Staying Sharp For Dummies E-Book

• Herausgeber: John Wiley & Sons
• Kategorie: Fachliteratur
• Sprache: Englisch

Seitenzahl: 944

Veröffentlichungsjahr: 2016

Beschreibung

Insight and actionable information on keeping your brain sharp as you age Your brain controls who you are--how you think, feel, and act. As you age, it's not uncommon to want to remain as sharp and "with it" as you were in your younger years. Whether you want to hone your memory, manage stress and anxiety, or simply eat brain-healthy food, Staying Sharp For Dummies shows you how to keep your mind sharp, agile, and creative well into your golden years. Research shows anyone can improve brain performance--and it's never too late to make changes to achieve your optimal brain health. While brain exercises certainly help, it's also vital to promote healthier living as a holistic way to support brain health. Staying Sharp For Dummies explains how keeping physically fit, eating right, managing stress, and even connecting with others helps give your brain the boost it needs to stay sharp--well into your golden years. * Build a better brain through nutrition, lifestyle changes, and brain workouts * Cope with a specific brain disorder, such as stroke, Dementia, Alzheimer's, and Parkinson's * Stay sharp and improve memory and concentration * Access an online bonus chapter from Alzheimer's For Dummies and Dementia For Dummies If you or a loved one are looking for authoritative, accessible guidance on staying sharp, this essential guide endorsed by the American Geriatric Society and the American Geriatric Society Health in Aging Foundation covers the gamut of lifestyle and activity changes that can maximize brain function and health.

Leseprobe

Staying Sharp For Dummies®

Published by: John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030-5774, www.wiley.com

Copyright © 2016 by John Wiley & Sons, Inc., Hoboken, New Jersey

Published simultaneously in Canada

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Library of Congress Control Number: 2016934504

ISBN: 978-1-119-18779-0 (pbk); 978-1-119-18781-3 (ebk); 978-1-119-18780-6 (ebk)

Staying Sharp For Dummies®

To view this book's Cheat Sheet, simply go to www.dummies.com and search for “Staying Sharp For Dummies Cheat Sheet” in the Search box.

Table of Contents

Cover

Introduction

About This Book

Foolish Assumptions

Icons Used in This Book

Beyond the Book

Where to Go From Here

Part 1: Getting Started with Staying Sharp

Chapter 1: Training Your Brain

Getting Ready to Train

Discovering How the Brain Works

Separating Fact from Fiction

Chapter 2: Improving Your Language Skills

Finding the Right Word

Remembering Your Shopping List and Other Important Things

Measuring Your Language Skills with IQ Tests

Chapter 3: Sparking Your Creativity

Boosting Your Brainpower with Creative Endeavors

Tapping out Tempo

Drawing Isn’t Just for Picasso

Looking at the Difference a Creative Brain Makes

Chapter 4: Recognizing Faces and Remembering Directions

Understanding Visual-Spatial Memory Skills

Banishing the “You Look Familiar, But I Can’t Remember You” Phenomenon

Working Your Memory Muscle

Measuring Your Brain’s Visual-Spatial IQ

Chapter 5: Getting a Handle on Brain Games

Pumping Up Your Synapses

Building a Cognitive Reserve

Taking a Whole-Body Approach to Brain Health

Getting Logical

Fiddling with Riddles

Decoding Cryptograms

Straightening Out Word Scrambles

Relaxing with Word Searches

Tackling the Crossword Grid

Chapter 6: Puzzles

Logic Puzzles

Riddles

Cryptograms

Word Scrambles

Word Searches

Answers

Part 2: Boosting Your Memory

Chapter 7: Cultivating Your Memory Skills

Wondering about Skips in Your Memory

Clearing the Air of Random Noise and Ridiculous Ideas

Improving Your Memory

Chapter 8: Discovering How Your Brain Remembers

Navigating Through Your Hemispheres and Lobes

Brain Cells: Zooming in for a Closer Look

Staging Your Memories: Long Term, Short Term

Sorting and Recovering Your Memories Down Pathways

Chapter 9: Memory Tricks and Tips

Introducing Mnemonics, Your Memory Sidekick

Hanging Memories on Pegs

Putting Memories into Familiar Places

Telling Yourself a Story to Link Memories

Choosing the Right Mnemonic at the Right Time

Chapter 10: Keeping Your Memory Sharp as You Grow Older

Mentally Noting How Memory Changes with Age

Making Full Use of a Vintage Brain

Mental Gymnastics: Inflating a Shrinking Brain

Becoming an Old Dog Who Remembers New Tricks

Chapter 11: Schooling Memory

Organizing Your Recall

Striving for Meaning Rather Than Rote

Taking Notes and Remembering What You’ve Heard

Remembering What You Read

Chapter 12: Honing Your Long-Term Memory

Remembering Your Past: Autobiographical Memory

Using Your Everyday Knowledge: Semantic Memory

Long-term Skills: Procedural Memory

Chapter 13: Improving Your Short-Term Memory

Speaking Your Brain’s Language: Verbal Memory

Seeing Your Brain’s Perspective: Visual Memory

Moving at Your Brain’s Pace: Spatial Memory

Chapter 14: Keeping Your Memory Intact in a High-Speed World

Staying Organized at the Center of the Cyclone

Dodging the Hazards of Multitasking

Breaking Away from a Media-Crazed World

Aiding Your Memory with External Cues

Part 3: Managing Stress: Relaxing Mind and Body

Chapter 15: Understanding Stress

So What Exactly Is Stress Anyhow?

Understanding Where All This Stress Is Coming From

Looking at the Signs and Symptoms of Stress

Breaking Down How Stress Can Make You Sick

Stressing Out Your Family and Friends

Can Stress Be Good?

How This Whole Stress Thing Got Started

Knowing the Signs of Stress

Understanding Stress Is As Simple As ABC

Managing Stress: A Three-Pronged Approach

How Stressed Are You? Finding Ways to Measure Your Stress Level

Monitoring Your Stress with a Stress Journal

Facing Roadblocks

Chapter 16: Relaxing Your Body

Stress Can Be a Pain in the Neck (and That’s Just for Starters)

Breathing Away Your Tension

Tensing Your Way to Relaxation

Mind over Body: Using the Power of Suggestion

Stretching Away Your Stress

Massage? Ah, There’s the Rub!

Taking a Three-Minute Energy Burst

Minding More Ways to Relax

Chapter 17: Stress-Reducing Organizational Skills

Figuring Out Why Your Life Is So Disorganized

Clearing Away the Clutter

Organizing Your Space

Organizing Information

Keeping Your Life Organized

Chapter 18: Meditation 101

Getting an Overview of How the Journey Unfolds

Developing and Directing Awareness: The Key to Meditation

Making Meditation Your Own

How Life Drives You to Meditate

How to Survive the 21st Century with Meditation

A Dozen More Great Reasons to Meditate

Part 4: Improving Your Lifestyle: Nutrition and Exercise

Chapter 19: Eating, Exercising, and Getting Your Zzzs

Surveying Stress-Effective Eating

Examining Stress-Reducing Exercise and Activity

Getting a Good Night’s Sleep

Chapter 20: Maintaining a Healthy Weight and Fitness Level

Understanding Healthy Body Weight

Weighing the Tolls of Extra Weight

Assessing Your Current Level of Health

Custom-Designing Your Plan with Balance in Mind

When Weight Just Won’t Come Off: Considering Weight-Loss Surgery

Succeeding at the Hardest Part: Maintaining Your Healthy Weight!

Chapter 21: Considering a Plant-Based Diet

What Does “Plant-Based” Mean?

Getting to the Root of a Plant-Based Diet

It’s Not a Diet, It’s a Lifestyle

Answering Common Questions about a Plant-Based Diet

A Quick Guide to Making Plant-Based Eating Part of Your Everyday Life

Eating According to a Plant-Based Food Guide

Feeling Good with Food

Becoming a Wellness Warrior

Chapter 22: The Skinny on Superfoods

Understanding the Difference between Foods and Superfoods

Boning Up on Basic Nutrition

Creating a Healthy, Balanced Superfoods Diet

Taking the First Steps toward a Healthier You with Superfoods

Boosting Your Immune System

Helping Your Heart

Losing Weight

Protecting Against Cancer

Improving Digestion

Easing Inflammation

Aging Beautifully

Part 5: Healthy Aging

Chapter 23: The Four Major Health Concerns as You Age

Life Expectancy in the 21st Century

The Basics of Pro-Aging: The Best Actions You Can Take

If Staying Young and Healthy Is So Easy, Why Isn’t Everyone Doing It?

Looking at Cancer: The Four Most Common Forms

Being Informed about Diabetes

Cardiovascular Disease

Osteoporosis

Chapter 24: Evaluating Your Health and History and Setting Goals for Wellness

Investigating and Writing Down Your Medical and Family History

Visiting the Doc

Determining Your Goals and Putting Them on Paper

Pushing for Persistence to Successfully Reach Your Goals

Chapter 25: Stroke Risk Factors and Prevention

Noting the Types of Stroke

Paying Attention to the Warning Signs of Stroke

Underscoring the Importance of Stroke Prevention

High Blood Pressure: Stalking the Silent Killer

Who’s at Risk for High Blood Pressure

Lowering Blood Pressure to Reduce Stroke

Drugs for Lowering Blood Pressure

Checking Out How Fat Works

Getting to Know the Two Types of Fat: Cholesterol and Triglycerides

Fat Transporters: HDL, LDL, and Others

Testing for Fat Trouble in Your Body

Keeping Fats in Check with Statin Drugs

Heart and Vascular Disease

Controlling Diabetes

Fighting Obesity with Diet and Exercise

Making a Plan for Reducing Stroke Risk

Chapter 26: Don’t Worry, Be Happy: The Keys to Maintaining Health and Vitality

Factoring In the Importance of a Positive Attitude

Embracing a Healthy, Balanced Approach to Life

Staying Active and In Touch with the World

Connecting with Your Spiritual Side

Connecting with Others: The Significance of Support

S-E-X: Why Getting It On May Help You Live Longer

Part 6: The Part of Tens

Chapter 27: Ten Ways to Make Your Home Safer as You Age

Take Precautions to Prevent Falls

In Case of Fire … Plan Ahead

Be Sure Your Meds are Safe

Stock Your Emergency Supply Kit

Update Your Life-Saving Skills

Let Lighting Lead Your Way

Reach Easily

Bathe Safely

Prevent Poisoning

Make Sure that You Can See Clearly Now

Chapter 28: Ten (Plus) Almost-Superfoods that Can Help Round Out Your Diet

Whole Grains

Poultry

Bison

Yogurt

Snap Beans

Cabbage

Winter Squash

Cauliflower

Canola Oil

Grapes

Mangos

About the Authors

Advertisement Page

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End User License Agreement

Guide

Cover

Table of Contents

Begin Reading

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Introduction

Welcome to Staying Sharp For Dummies!

Your brain plays a major role in almost everything you do, including thinking, feeling, communicating, breathing, remembering, working, playing, sleeping, and countless other activities. Maintaining and improving your brain’s health is vital to your quality of life — a fact that becomes even truer as you get older. Staying Sharp For Dummies focuses on understanding how to maximize your brain power within the context of your overall health. The book aims to provide you with information, tools, resources, and tangible steps to keep a healthy, active mind. The good news is that you can do a lot to keep your brain sharp throughout your life.

About This Book

This book weaves together up-to-date information from a range of For Dummies titles into a fresh take on helping keep your body and your brain working better and longer. You’ll find a wealth of tips and ideas not only for improving your memory and reasoning but also for practicing mindfulness, relaxing, eating right, exercising, and heading off common health problems as you get older.

Because this is a For Dummies book, the chapters are written and arranged so you can pick and choose whichever topics interest you most and dive right in. You don’t need to read the chapters in sequential order, although you certainly can if you like — the topics are organized to provide a rich experience should you just plow through starting at Chapter 1.

Foolish Assumptions

This book makes some assumptions about you, the reader. Hopefully, one of the following descriptions fits you:

You’re young, bright, and healthy and want to stay that way as much as possible your whole life.

You’re entering middle age, and it’s dawning on you that your past choices in lifestyle, habits, diet, and so on may be starting to affect your life in not entirely positive ways — and you want to turn things around.

You’re already experiencing health issues that seem to be affecting your brain function and quality of life, and you want to explore remedies and options for reversing some decline and/or staying as sharp as possible as you get older.

This book doesn’t assume any particularly advanced knowledge of medicine or physiology (or any other ology, for that matter). All you need is a desire to investigate how your brain and body can work together as beneficially as possible. When followed properly, much of the advice herein could add years to your life — not to mention sparking interest, spurring action, strengthening, and even calming your soul. Not a bad deal.

Icons Used in This Book

Throughout the book, several icons designed to point out specific kinds of information. Keep an eye out for them:

A Tip points out especially helpful or practical information about a topic. It may be hard-won advice on the best way to do something or a useful insight that may not be obvious at first glance.

A Warning highlights potential problems or trouble you may encounter and mistaken assumptions that can lead to difficulties.

Technical Stuff points out nonessential stuff that may be interesting if you’re really curious about something. You can safely skip these bits if you’re in a hurry or just looking for the basics.

Remember indicates stuff that you’ll do well to stash somewhere in your memory for future benefit.

Beyond the Book

In addition to what you’re reading right now, this product also comes with a free access-anywhere Cheat Sheet that provides tips on keeping your brain sharp through exercise, nutrition, reducing stress, and so on. To get this Cheat Sheet, simply go to www.dummies.com and search for “Staying Sharp For Dummies Cheat Sheet” in the Search box.

Where to Go From Here

You can approach this book from several different angles. You can start with Chapter 1 and read straight through to the end. But you may not have time for that, or maybe you feel like exploring, say, meditation or improving your diet or lowering your blood pressure. Try checking out the table of contents to see a map of what’s covered in the book and then flip to any particular chapter that catches your eye. Or if you’ve got a specific issue or topic you’re burning to know more about, try looking it up in the index.

When you’re done with the book, you can further your adventures in staying sharp by checking out other titles written by the authors of the original books this material comes from. Check out the “About the Authors” page to see what else these experts have written on topics of interest to you.

Ultimately, the phrase staying sharp should imply long-term commitment to changing some of your habits and making different lifestyle choices. Science has learned a whole lot about how the body and brain work and what you can do to make them work better. This book is an attempt to provide a kind of synthesis of a lot of different areas of study, all converging on this integrated topic. You should aim to do that, too. Part of staying sharp, then, should include maintaining an interest in continuing to stay sharp. Never stop trying to challenge and improve yourself — just that by itself can do wonders. Good luck to you!

Part 1

Getting Started with Staying Sharp

IN THIS PART …

Get an introduction to brain training and discover how keeping your brain alert and active can keep your thinking sharp.

Discover how to enhance your language skills and remember more.

Boost your brain power with music, drawing, and more kinds of creativity.

Focus on visual-spatial memory — learning how your eyes and your brain work together to help you remember names and directions.

Find out how games and training help your brain stay sharp.

Give your gray matter a workout with lots and lots of examples of real logic puzzles, riddles, cryptograms, and word scrambles.

Chapter 1

Training Your Brain

IN THIS CHAPTER

Finding out about your brain

Sorting through brain facts and legends

Introducing brain training for adults

You want your brain to work at its best, whether you want to stay sharp to keep up with your children or to excel at your work. The exciting thing is that science now provides evidence for what works and what doesn’t. Training your brain no longer has to be a case of trial and error. Staying Sharp For Dummies covers some cutting-edge, scientific research and examines how this research can influence your life and change your brain for the better.

The brain weighs a mere three pounds, yet it’s responsible for the smooth running of your whole body. With 100 billion cells, your brain is like the CEO of a giant corporation. How can something so small have so much responsibility? This chapter provides basic information on how your brain works. This understanding gives you the foundation for knowing how to best train your brain.

Getting Ready to Train

Brain training is a growing area of interest, both in research and in the public mind. Exciting emerging evidence indicates that you can train your brain and, as a result, change your circumstances. But what works and what doesn’t? Can everyone benefit from brain training? The final section of this chapter looks at this issue in some detail.

People who use their brains more efficiently tend to have better jobs, better relationships, and more happy and fulfilling lives. Although you may have heard that you’re stuck with the brain you have, scientific research has now found that this isn’t true!

You’re probably familiar with the left brain and the right brain. Well, it’s true that the brain is made up of left and right hemispheres, which do have different functions. However, the idea that some people are only left-brainers and others are only right-brainers isn’t entirely true. For example, language skills are located in the left hemisphere (see Chapter 2), and everyone uses this part of the brain! You don’t need to hide behind the excuse that you’re a right-brainer so you can’t do math calculations. With the activities included in this book, you can get both halves of your brain working at their optimum levels.

The different parts of the brain don’t work in isolation; they work together as a team. When you train one part of the brain, the whole brain benefits. You can think of the brain like an orchestra or a sports team. The message is the same — one star player can’t carry the rest of the team.

Developing a healthy brain

Mental health refers to your state of being. Are you happy? When do you find yourself frustrated? Do you feel stressed out? What makes you feel anxious? These questions are important in determining how well your brain functions, so make sure you pay attention to your mental health. Doing so can make the difference between living a fulfilled life or a frustrated one.

Don’t take your passions and hobbies for granted. Discover how they can make your brain more creative. A more creative brain is a smarter brain. Whether you’re a music lover, a budding writer, or a person with any of dozens of other interests, you can choose from a range of activities to help your brain.

Getting swept into myriad things that demand your attention on a daily basis is easy. Yet, in this ever-demanding environment, finding time to quiet your brain and create a space for contemplation is increasingly important. Calm time brings tremendous benefits for your brain. You don’t have to be a nun or a monk spending hours at a time to experience the benefits of contemplation. Scientific research has found that even ten minutes a day makes a big difference in improving how your brain functions.

One great way to train your brain is to keep it socially active. From picking up the phone to meeting for coffee to discussing the latest movie, growing research illustrates that friendships benefit the brain.

It’s not just face-to-face interactions that make a positive impact. Virtual friendships and actively engaging with others via digital technology or interacting within virtual experiences can also boost your brain power. Note that this brain benefit requires active involvement on your part. You don’t get that same cognitive benefit when you’re passively watching a video on a TV or a computer screen.

Getting healthy for life

A healthy lifestyle leads to a more efficient brain — one that can respond better to stress, remember information, and be more attentive. What you eat and drink, what exercise you do, how much sleep you get — all these actions affect your brain. Understanding how your daily decisions in these areas can make a big difference in your brain function is important. So before you take another bite of your sandwich or drink another glass of wine, find out what really is best for your brain.

Here are a few tips and strategies for tailoring your lifestyle to your brain’s advantage:

Eat for your brain.

Chocolate to boost your brain? Juice to help your memory? Steak to maintain your attention? Eating the right brain food doesn’t mean you end up eating only lettuce. On the contrary, many delicious and wonderful foods are packed with nutrients that are fantastic for your brain. See the chapters in

Part 4

for more information on the best foods for your brain.

Benefit from caffeine in moderation.

Caffeine is a double-edged sword. In some instances caffeine can help your brain work better. However, too much caffeine can impair other aspects of cognitive skills, such as the acquisition of new information, and increase your blood pressure. Best advice is to limit your caffeine intake.

Skip cocktail hour.

Alcohol has a negative effect on the brain. When you drink beer, wine, or liquor, your blood absorbs alcohol, which then circulates into your brain. It affects the parts of your brain that control your judgment, memory, speech, vision, and movement. Some impairments (think of the typical signs of drunkenness) are detectable after only one or two drinks. Check out the later section “

Does your brain shrink as you get older?

” for more on how alcohol impacts your brain.

Move it!

If you think

Chapter 19

, which is about exercise, is there to make you feel guilty for not getting a gym membership, don’t worry. It isn’t. Instead, you find out how the brain responds to physical activity, how you can keep depression and memory loss at bay, and even how to help your body heal more quickly.

Manage stress!

Learning to relax and thereby giving your brain a break from its daily grind is essential to mental health. Check out

Part 3

to find out about relaxation and the importance of managing stress to ensure that your brain is in great working shape.

Dispelling the myths of brain training

With the increase of brain training, people throw around many “facts.” The following list covers some of the more common statements about brain training:

You’re stuck with what you have.

A long-held view is that you’re born with the brain you have and you can’t do anything about it. For example, if you have a poor memory, then you’d better carry a notebook to help you remember! But exciting developments in scientific research show that you can train your brain. Studies show that at any age, you can do something to make a difference.

Your memory declines as you get older.

Here again, the general view is that memory gets worse as you get older. But recent evidence shows that this assumption isn’t necessarily true.

Working memory

skills (short-term memory skills concerned with temporarily storing and manipulating information) continue developing in the 20s and peak in the 30s. And very little decline in working memory skills actually occurs after that. Working memory in people in their 60s looks like working memory for those in their 20s. So now you don’t have an excuse for why you forgot to pick up milk on the way home.

All brain training is the same.

Unfortunately, this generalization isn’t the case. Many methods claim to train your brain, but not all methods work. Evaluate each method to decide whether evidence demonstrates that the method is effective. Check to make sure the method’s scientific trials showed transfer effects, had a control group, and used randomized samples.

Only one way to train your brain exists.

The brain has four main lobes, all of which are involved in making your brain work like a smooth-running machine. (Flip to the later section “

Discovering How the Brain Works

” for more on the parts of the brain.) This book is filled with different strategies for keeping your brain active, from what you eat to how you relax to how you exercise

.

Using what works for your brain

Make sure the brain-training programs you use have these key features:

Allow adaptive training.

Adaptive training

means that the training changes to your needs and your ability. So you won’t always work at the same level each time; if you’re doing well, you’re challenged with harder levels, and if you’re struggling, then you move to an easier level. Adaptive training is important to continue to challenge your brain.

Speed up.

Computer-based training often provides timed tests to help you improve your speed at solving problems. Studies have found that timed tasks make a difference by training your brain to work more quickly. Practicing timed tasks makes a difference to everyday activities as well. Try timing yourself when you solve a crossword or Sudoku. You’ll notice yourself getting faster and even eliminating that tip-of-the-tongue phenomenon (see

Chapter 2

for more strategies).

Keep it regular.

Training regularly is important. If you only use a program once a week, don’t expect to see results. Studies have found that you need to train at least three times a week to see maximum benefits for your brain. So get training!

The computer video game Tetris is an old favorite for many people. It requires you to rotate descending colored blocks so that they fit together without gaps rather than pile up. With each level, the blocks’ speed increases to challenge you. Now fans of Tetris can play with impunity — scientific evidence is on your side! Research shows that spatial memory improves after you play Tetris. Some scientists have also observed that physical changes occur in the brain after subjects play Tetris for an extended period — and that these players worked more efficiently in certain tasks. Not a bad result for just rotating some colored blocks on the screen!

In a recent survey, people reported that they preferred to use computerized products than puzzle books. This tendency may explain why brain-training products have skyrocketed in recent years. However, don’t give up on puzzles and board games. Strong evidence indicates that these activities keep your brain active. Even schoolchildren benefit more from playing board games like Scrabble than playing on a computer game. So don’t stop playing word games, doing crosswords, or challenging your spouse to late-night Scrabble; it’s great for your brain. (See Chapter 5 for a lot more about the science of brain games and Chapter 6 for plenty of actual games to try out.)

Discovering How the Brain Works

Understanding of the brain has come a long way since the notion of the four “humors” — black bile, yellow bile, phlegm, and blood. According to the ancient Greeks and Romans, an imbalance in one of these humors would result in illness and affect both mental and physical health. This dominant view remained firmly in place until the 19th century when modern medical research came on the scene.

Since then, scientists have made great strides in understanding how the brain works, and each day brings exciting new discoveries. In current understanding, the brain is divided into four parts.

The four-part brain

When Phineas Gage went to work on the morning of September 13, 1848, the 25-year-old probably had no idea that he was going to be immortalized in medical and psychology history for years to come.

Phineas was a railroad construction foreman who suffered severe head injuries as the result of a blast — a long iron rod was lodged in his head, entering the top of his skull and exiting through his cheek (see Figure 1-1). Remarkably, Phineas survived! He could walk, communicate, and seemed to be aware of his surroundings. However, his personality changed completely. He had great difficulty controlling his anger. After the accident, he transformed from a mild-mannered young man into a violent and hot-tempered individual. People who knew him before his accident said that he was no longer the same Phineas Gage they knew.

PD-US, Public Domain

FIGURE 1-1: The skull of Phineas Gage impaled with the iron rod.

Phineas’s injury provided the medical and psychological professions with great insight into how the brain works. By looking at the trajectory of the iron rod through his head, experts were able to begin to understand the link between different parts of the brain and everyday functioning.

Parts of the frontal lobe are linked to personality. Unfortunately for Phineas, this part of his brain sustained the most damage, resulting in his dramatic change in character. Other sections of the frontal lobe are associated with language and motor skills, which, thankfully for Phineas, remained intact.

Figure 1-2 shows the four major areas of the brain. Each of these lobes has a left and right side. The left and right sides of the brain are called the hemispheres of the brain.

Frontal lobe: As the name suggests, the frontal lobe is located in the front of the brain and makes up the largest part of the brain. A main function of the frontal lobe is to plan and organize incoming information. For example, if you have to plan a party, draw up the guest list, and organize the catering, your frontal lobe is critical in carrying out all these activities.

The frontal lobe is also instrumental in regulating behavior and emotions. This part of the brain, which is associated with a chemical known as dopamine, is sometimes called the brain’s pleasure center because it’s linked to attention, planning, motivation, reward, and enjoyment.

The frontal lobe doesn’t fully develop until people reach their 20s, which may explain why it’s so hard to convince a toddler to stop throwing a tantrum, or get a teenager to consider the long-term consequences of her decisions. Both of these scenarios involve the use of the frontal lobe to plan actions, consider consequences, and then alter actions as necessary.

Parietal lobe:

The

parietal lobe

is crucial to integrating and processing information from a range of different sources, including our senses and our vision. Information such as taste, temperature, and touch are processed here. The parietal lobe enables a person to integrate visual information in order to perceive spatial relationships such as where the body is located in relationship to other objects. It also enables drawing, writing, and calculating ability.

Temporal lobe:

The

temporal lobe

is the home of language processing

.

It’s responsible for auditory perception such as hearing and processing the sensory information from the ears into meaningful units such as words and sounds in our environment. The temporal lobe enables you to speak and to comprehend speech you hear. The temporal lobe is also home to another key player — the hippocampus, which allows the conversion of short-term memory to long-term memory and enables spatial navigation. (See the upcoming section “

Maintaining decision-making and memories

” for more.)

Occipital lobe:

The

occipital lobe

is the smallest of the four lobes and is located at the back of the brain. It’s home to the visual cortex and is responsible for processing visual information, perceiving motion, and detecting color differences. The occipital lobe lets you make sense of incoming visual information.

© John Wiley & Sons, Inc.

FIGURE 1-2: The four major lobes of the brain.

As mentioned earlier in the chapter, the parts of the brain don’t function in isolation; they work together like members of an orchestra. But sometimes all the parts don’t contribute the way they should. In some cases, certain parts underperform, but other parts overperform. One example is exhibited by individuals with attention-deficit hyperactivity disorder (ADHD). Research on ADHD has established that these people have underactive components in the part of their frontal lobes responsible for planning and controlling behavior but overactive parts of the frontal lobe’s motor cortex, which is necessary for managing motor functions. The combination of underperformance in one area and overperformance in another area results in the hyperactive and impulsive behavior that is characteristic of ADHD.

A LESSON FROM THE PAST: LOBOTOMIZING THE PREFRONTAL CORTEX

Your knowledge of a lobotomy may be based on Jack Nicholson’s excellent portrayal of a rebellious patient at a mental hospital in the film One Flew Over the Cuckoo’s Nest. In this movie, a lobotomy effectively reduces someone to the same mental state as a shop window mannequin — expressionless and unemotional.

The lobotomy procedure consists of cutting the brain connections that go in and out of the prefrontal cortex. Mid-20th century doctors considered a lobotomy the final step for modifying extreme behavior when other treatments, such as electrical shock therapy, failed. Doctors thought that a lobotomy calmed the patient, reduced aggressive behavior, and improved the patient’s quality of life. However, they now know that this procedure is barbaric and certainly not helpful.

Perhaps one of the youngest known recipients of a lobotomy is Howard Dully, who was only 12 years old at the time. As a result of a diagnosis of childhood schizophrenia (that was unconfirmed by other medical professionals at the time), Dully underwent the lobotomy procedure. His mental illness manifested itself in some ways as a typical teenage personality: He was moody, insolent, and contrary. However, the truth behind his behavior was harder to decipher. What was Dully really like, and was his behavior so extreme that a lobotomy was the only option? These questions have spawned Dully’s lifelong search for answers.

He took several decades to recover, drifting from a mental institute to prison and finally to the streets. He’s since overcome his setbacks and recounted his story in a harrowing tale of survival and redemption from a brutal procedure once considered acceptable by doctors but, thankfully, no longer in practice today.

Dully’s story is interesting because it reveals that our knowledge of the brain is evolving. His journey has also served to fuel many heated discussions about how the brain works and the impact of removing sections of the brain.

Maintaining decision-making and memories

The prefrontal cortex, located within the frontal lobe, is one of the most crucial parts of the brain. It’s linked with executive function skills, which you use for everyday tasks like decision-making and planning.

For example, say you’re driving down a busy road at rush hour and you’re late for a meeting. You’re alone in the car, but you see the carpool lane traffic is moving much more quickly. Should you switch to that lane so you can get to your meeting on time? You see a police car up ahead has pulled over a speeding car. You’re weighing the choice of staying out of the carpool lane and being late for your meeting versus illegally entering the carpool lane in order to get to your meeting on time but having the chance of getting pulled over. Complex decisions like this one, where you have to plan your actions and weigh the resulting consequences, require your prefrontal cortex to perform executive function.

Here’s another scenario: The phone rings, and it’s someone giving you important information about an event you’re attending. You’re busy writing down all this information when you hear a beep from your computer alerting you that an email has just come in from a friend. You decide to open your email, but as you’re skimming it you get distracted and miss some of the event information over the phone.

Both of these examples illustrate how you use your prefrontal cortex to make decisions daily. You have to keep a goal in mind (reaching your destination or writing down key information), juggle different scenarios (should you go in the carpool lane?) or tasks (should you check your email while on the phone?), and inhibit potentially distracting information to reach your goal (putting the thought of using the carpool lane out of your head; delaying the desire to read your email at that moment).

In addition to the prefrontal cortex, the hippocampus and amygdala are key players in keeping your brain active and alert.

Hippocampus

The name hippocampus comes from the Greek word for “seahorse,” and it’s called such because it looks very much like a seahorse. The hippocampus is located deep in the temporal lobe near the center of the brain.

The hippocampus has two main functions: long-term memory and spatial understanding. (See Chapter 10 for more information on long-term memory.) The brain stores two types of long-term memories in the hippocampus:

Autobiographical memory

stores meaningful events — birthdays, weddings, graduations, and so on. Such memory is based on personal experiences with specific objects, people, and events you’ve experienced at particular times and places in your life.

Declarative

or

semantic memory

is general knowledge and facts about the world.

The hippocampus also functions like a spatial map that helps with directions and navigation. So if you get lost often while you’re driving, blame your hippocampus!

Damage to the hippocampus can result from Alzheimer’s disease, oxygen deprivation, and epilepsy that affects the temporal lobe, where the hippocampus is located. People who sustain damage to the hippocampus experience difficulties in forming new memories, a condition known as anterograde amnesia. Hippocampus damage can also erode older memories (known as retrograde amnesia). However, if your hippocampus is damaged, you still retain procedural memory — that is, how to do things like walking, talking, or biking or other motor tasks. (See Chapter 12 for more on this topic.) The fact that long-term memories are stored in different parts of the brain can explain why an amnesic patient may not be able to remember important events from her life but may still remember how to play the guitar.

The hippocampus is also linked to mental health. Research into patients with depression has found that the hippocampus is usually smaller (by around 10 to 20 percent) compared with those not suffering from depression. The actual reduction of the hippocampus depends on the frequency of depressive episodes as well as the length of time the depression went untreated. This explains the cognitive deficits that are associated with major depression including declarative memory. Antidepressant medications work to treat the underlying neurochemical imbalances that occur in clinical depression that cause these symptoms.

Amygdala

The name amygdala comes from the Greek word for “almond” due to its physical similarity to that nut. The amygdala is located next to the hippocampus in both sides of the brain. It’s associated with emotional memories — those that make you laugh and those that make you cry or feel afraid. For instance if you ever were bitten by a vicious dog, the amygdala helps you process that event, making you more alert and fearful around dogs.

The amygdala also helps you store information over the long term. If you have an emotional connection to the information you’re trying to learn, you’re more likely to transfer this knowledge to your long-term memory. For example, if you’re trying to learn a new language, you can associate the new words with an emotional memory to help you make those words stick.

The amygdala is linked with higher creative activity (see Chapter 3 for more on boosting your creative skills).

TESTING YOUR PREFRONTAL CORTEX’S FUNCTION

Here’s an example of a test to measure how well your prefrontal cortex works.

Say these words as fast as you can:

Cat Dog Dog Cat Dog Cat Cat Dog Cat Dog

Now say them when you see the pictures

Now here’s the tricky part: Say the opposite word of what you see. If the word is Cat, say “Dog”; if the word is Dog, say “Cat.”

Cat Dog Dog Cat Dog Cat Cat Dog Cat Dog

How did you do? Here’s a final one: Say the opposite word of the picture.

It’s a lot harder than it looks, isn’t it? You had to suppress or inhibit your automatic response to say the word rather than its opposite. You may be familiar with a more common version (called the Stroop test) where you have to state the color that a word is printed in rather than the actual word itself — for example, the word blue written in green ink.

Separating Fact from Fiction

Some popular notions of certain “facts” about the brain persist. You’ve heard these so-called facts before, but, like urban legends, you must question whether they’re really true. This section discusses three widespread notions about the brain.

Do you really use only 10 percent of your brain?

No evidence supports the statement that humans use only a tenth of their brains. Although this idea has been highly popular (see the nearby sidebar “Bending the truth”), no research whatsoever demonstrates that it’s true.

Here are a few ways you can be sure that this statement is false.

Look inside.

Brain imaging techniques clearly reveal that people use their entire brains. Although you may use only a small part of your brain for a simple activity, whenever you engage in a complex activity, you’re using multiple parts of your brain simultaneously. A useful analogy is to think of your muscles. When you’re eating, you may only be using muscles relevant for chewing and swallowing. But that doesn’t mean that you only ever use 10 percent of your muscle group. In fact, it sounds ludicrous to suggest that! In the same way, you use all of your brain at one point or another every day.

Consider the widespread effects of localized brain damage.

The idea of using only 10 percent of the brain suggests that the brain has very specialized purposes — that you only need certain parts of the brain to function efficiently. This idea supposes that the other 90 percent of the brain is like your tonsils or your appendix — it’s there, but you don’t really need it for anything important. This assumption is

not

true. Even damage to a small area of the brain caused by a stroke, head injury, or certain disorders like Parkinson’s disease has a devastating impact on the brain; it can leave people with difficulty speaking, remembering loved ones, and even forming new memories. All of your brain is necessary to function successfully.

Say baaa.

The average human brain weighs about 3 pounds (1,400 grams). Removing 90 percent of the brain would leave only about 0.3 pounds of brain tissue (140 grams) — the size of a sheep’s brain. So the next time someone tells you that people use only 10 percent of the brain, say baaa!

BENDING THE TRUTH

The notion that people use only 10 percent of their brains was made especially popular in the 1990s by psychics who wanted to promote the idea that if you use only a small portion of your brain, you can develop the rest of the brain for psychic activities. You may have heard of a psychic named Uri Geller, whose claim to fame is his ability to bend spoons and make broken watches work again. How does he do it? In his writings, Geller attributed his fantastical “achievements” like spoon-bending and telepathic power to his ability to harness the unused 90 percent of his brain.

However, as is so often the case, the truth is much less sensational. The spoon-bending trick is thought to be the result of misdirecting the audience’s attention to focus on something else and then revealing an existing bend. In fact, when Geller was asked to perform his signature trick on silverware that he didn’t have access to previously, he failed. His famous clock-starting trick was thought to be the result of using magnets, as slow-motion television footage revealed.

Does your brain shrink as you get older?

The short answer is yes, but not as much as you think — and brain training can make a difference. As you get older, your brain does shrink around 2 percent every ten years. This shrinkage actually begins in early adulthood but is unlikely to be noticeable on brain imaging until you hit your 60s. A greater percentage of brain shrinkage is linked with dementia. In other words, a certain amount of brain shrinkage is normal, but too much is a telltale sign of problems like Alzheimer’s and dementia.

To keep your brain functioning effectively as you get older despite any age-related brain shrinkage, pay attention to these tips:

Pass on the alcohol. Studies confirm that alcohol isn’t great for your brain. In addition to all the negative health side effects, it makes your brain smaller. Alcohol dehydrates your tissues, and when this happens constantly, your most sensitive tissue — your brain — starts losing volume.

Multiple studies have found that the more a person drinks, the more his brain volume diminishes. However, even light drinkers (meaning those who consume one to seven alcoholic drinks per week) suffer these effects of alcohol on the brain. A study that looked at people in their 60s found that even light drinkers had a smaller brain volume compared with those who abstained from alcohol. Heavy drinkers — those who drank more than 14 drinks each week — suffered the most when it came to brain volume. However, research has shown that with abstinence, the brains of alcohol-dependent subjects return to nearly the same size as those of their non-drinking counterparts.

Take special care if you’re a woman — the brain volume of women is more affected by alcohol than men, meaning that the effects of light drinking can be more pronounced in women compared to men.

Relax. Stress can also impact your brain (see Part 3 for more on developing a positive mindset and learning to relax). Stress impact happens especially when you experience repeated stress, such as a prolonged illness or difficulty at work.

The prefrontal cortex, linked to decision-making and attention, and the hippocampus, linked to long-term memory, are most affected by stress (see the earlier section “Maintaining decision-making and memories”). Stress makes it harder for people to focus on the task at hand or take in new information. When people are overstressed, they lose their ability to be mentally flexible, meaning that they have trouble shifting a course of action according to the changing demands of a situation.

Teach yourself.

Some brain shrinkage is normal, but this shrinkage doesn’t have to impact the way your brain functions. In fact, studies have demonstrated that people in their 60s to 90s are able to “buffer” the effects of brain shrinkage. How? Simple: They kept their brains active by learning new things. People who spend time discovering and learning something they didn’t know give their brains more protection against dementia and memory loss. By keeping up your intellectual activity, you’re mentally exercising your brain to keep it fit as you grow older.

Can you change your brain?

Yes! Yes! Yes!

The exciting news is that you can alter the impact of aging on your brain. Read on to find out more about how you can maintain (and further develop) your mental agility.

The brain has a certain plasticity, which means that you can change. In fact, most of this book is dedicated to providing you with tips on what you can do to make a difference to your brain.

Brain plasticity or neuroplasticity refers to the changes that occur in your brain pathways and brain cell connections due to changes in your behavior, environment, and emotions. Your experiences actually reorganize the neural pathways in your brain, so persisting functional changes occur in your brain when you learn new things and have new experiences.

Scientific evidence has shown that performing certain activities can change your brain. Here are a few examples:

Train it.

The idea of brain training is a new and exciting area of research, and growing evidence suggests that you can do something to change your brain. However, be aware that not all brain-training processes give you the same results.

Get moving.

Exercise isn’t only good for your body — it’s great for your brain too! For starters, exercise increases the blood flow to your muscles and to your brain, which helps them work better. Physical activity can also renew parts of the brain that are damaged and lead to new brain stem cells. This change means better memory and an improved ability to learn.

Make time for bingo.

If exercise sounds like too much work for you, you’ll be happy to know that socializing is also great for your brain. Studies have found that when people spend time interacting, the brain releases a feel-good hormone —

oxytocin

— which can boost memory.

THE ACTIVE STUDY

In 2006, the National Institute of Aging and the National Institute of Nursing Research completed a study of cognitive training in older adults. This study, called Advanced Cognitive Training for Independent and Vital Elderly (ACTIVE), was the first randomized controlled trial to show long-lasting positive benefits of brief cognitive training in older adults.

The study subjects were 2,802 healthy seniors over age 65 that were living independently. Participants were randomly assigned to the four study groups. Three of these groups attended up to ten computer-based training sessions that emphasized a particular cognitive ability, including memory, reasoning, and processing speed (or how quickly subjects could respond to prompts on a computer screen). The fourth group served as a control group and didn’t participate in any cognitive training. Eleven months later, 60 percent of those who completed the initial training also participated in 75-minute “booster” sessions designed to help maintain cognitive improvements gained from the earlier training.

Participants were given cognitive tests before the training, after both the initial and booster training sessions, and annually for the following five years. The researchers found that the cognitive improvements gained from the training basically counteracted the degree of decline in cognitive performance that would be expected over a 7-to-14- year period in seniors without dementia.

The study showed significant improvements in the skills taught after the initial training in the study groups, including 26 percent of the memory group, 74 percent of the reasoning group, and 87 percent of the processing-speed group. After five years, the participants in the study groups all performed better on tests in their respective areas of training than did people in the control group who received no training. The greatest improvement was seen in the reasoning and processing-speed groups who received the booster training.

The researchers also looked at the effects of the study on subjects’ everyday lives. After five years, all three study groups who received cognitive training reported less difficulty than the control group in daily tasks such as preparing meals, managing money, and doing housework. However, these results were only statistically significant in the group with reasoning training.

The ACTIVE study showed that cognitive training is useful —that even a relatively brief intervention with targeted cognitive exercises can produce lasting improvements in the skills taught. Based on this study, you can see the benefit of brain-training to help you stay sharp as you age.