iBrain

Surviving the Technological Alteration of the Modern Mind

Dr. Gary Small, Gigi Vorgan

• Publisher: HarperCollins e-books
• Year: 2009
• ISBN:
  9780061981708
• Topic: Design
• Subtopic: UI/UX Design

Their insights are extraordinary, their behaviors unusual. Their brains—shaped by the era of microprocessors, access to limitless information, and 24-hour news and communication—are remapping, retooling, and evolving. They're not superhuman. They're your twenty-something coworkers, your children, and your competition. Are you keeping up?

In iBrain, Dr. Gary Small, one of America's leading neuroscientists and experts on brain function and behavior, explores how technology's unstoppable march forward has altered the way young minds develop, function, and interpret information. iBrain reveals a new evolution catalyzed by technological advancement and its future implications: Where do you fit in on the evolutionary chain? What are the professional, social, and political impacts of this new brain evolution? How must you adapt and at what price?

While high-tech immersion can accelerate learning and boost creativity, it also has its glitches, among them the meteoric rise in ADD diagnoses, increased social isolation, and Internet addiction. To compete and thrive in the age of brain evolution, and to avoid these potential drawbacks, we must adapt, and iBrain —with its Technology Toolkit—equips all of us with the tools and strategies needed to close the brain gap.

One

YOUR BRAIN IS EVOLVING RIGHT NOW

The people who are crazy enough to think they can change the world are the ones who do.

Steve Jobs, CEO of Apple

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You’re on a plane packed with other business people, reading your electronic version of the Wall Street Journal on your laptop while downloading files to your BlackBerry and organizing your PowerPoint presentation for your first meeting when you reach New York. You relish the perfect symmetry of your schedule, to-do lists, and phone book as you notice a woman in the next row entering little written notes into her leather-bound daily planner book. You remember having one of those…What? Like a zillion years ago? Hey lady! Wake up and smell the computer age.

You’re outside the airport now, waiting impatiently for a cab along with a hundred other people. It’s finally your turn, and as you reach for the taxi door a large man pushes in front of you, practically knocking you over. Your briefcase goes flying, and your laptop and BlackBerry splatter into pieces on the pavement. As you frantically gather up the remnants of your once perfectly scheduled life, the woman with the daily planner book gracefully steps into a cab and glides away.

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The current explosion of digital technology not only is changing the way we live and communicate but is rapidly and profoundly altering our brains. Daily exposure to high technology—computers, smart phones, video games, search engines like Google and Yahoo—stimulates brain cell alteration and neurotransmitter release, gradually strengthening new neural pathways in our brains while weakening old ones. Because of the current technological revolution, our brains are evolving right now—at a speed like never before.

Besides influencing how we think, digital technology is altering how we feel, how we behave, and the way in which our brains function. Although we are unaware of these changes in our neural circuitry or brain wiring, these alterations can become permanent with repetition. This evolutionary brain process has rapidly emerged over a single generation and may represent one of the most unexpected yet pivotal advances in human history. Perhaps not since Early Man first discovered how to use a tool has the human brain been affected so quickly and so dramatically.

Television had a fundamental impact on our lives in the past century, and today the average person’s brain continues to have extensive daily exposure to TV. Scientists at the University of California, Berkeley, recently found that on average Americans spend nearly three hours each day watching television or movies, or much more time spent than on all leisure physical activities combined. But in the current digital environment, the Internet is replacing television as the prime source of brain stimulation. Seven out of ten American homes are wired for high-speed Internet. We rely on the Internet and digital technology for entertainment, political discussion, and even social reform as well as communication with friends and co-workers.

As the brain evolves and shifts its focus toward new technological skills, it drifts away from fundamental social skills, such as reading facial expressions during conversation or grasping the emotional context of a subtle gesture. A Stanford University study found that for every hour we spend on our computers, traditional face-to-face interaction time with other people drops by nearly thirty minutes. With the weakening of the brain’s neural circuitry controlling human contact, our social interactions may become awkward, and we tend to misinterpret, and even miss subtle, nonverbal messages. Imagine how the continued slipping of social skills might affect an international summit meeting ten years from now when a misread facial cue or a misunderstood gesture could make the difference between escalating military conflict or peace.

The high-tech revolution is redefining not only how we communicate but how we reach and influence people, exert political and social change, and even glimpse into the private lives of co-workers, neighbors, celebrities, and politicians. An unknown innovator can become an overnight media magnet as news of his discovery speeds across the Internet. A cell phone video camera can capture a momentary misstep of a public figure, and in minutes it becomes the most downloaded video on YouTube. Internet social networks like MySpace and Facebook have exceeded a hundred million users, emerging as the new marketing giants of the digital age and dwarfing traditional outlets such as newspapers and magazines.

Young minds tend to be the most exposed, as well as the most sensitive, to the impact of digital technology. Today’s young people in their teens and twenties, who have been dubbed Digital Natives, have never known a world without computers, twenty-four-hour TV news, Internet, and cell phones—with their video, music, cameras, and text messaging. Many of these Natives rarely enter a library, let alone look something up in a traditional encyclopedia; they use Google, Yahoo, and other online search engines. The neural networks in the brains of these Digital Natives differ dramatically from those of Digital Immigrants: people—including all baby boomers—who came to the digital/computer age as adults but whose basic brain wiring was laid down during a time when direct social interaction was the norm. The extent of their early technological communication and entertainment involved the radio, telephone, and TV.

As a consequence of this overwhelming and early high-tech stimulation of the Digital Native’s brain, we are witnessing the beginning of a deeply divided brain gap between younger and older minds—in just one generation. What used to be simply a generation gap that separated young people’s values, music, and habits from those of their parents has now become a huge divide resulting in two separate cultures. The brains of the younger generation are digitally hardwired from toddler-hood, often at the expense of neural circuitry that controls one-on-one people skills. Individuals of the older generation face a world in which their brains must adapt to high technology, or they’ll be left behind—politically, socially, and economically.

Young people have created their own digital social networks, including a shorthand type of language for text messaging, and studies show that fewer young adults read books for pleasure now than in any generation before them. Since 1982, literary reading has declined by 28 percent in eighteen-to thirty-four-year-olds. Professor Thomas Patterson and colleagues at Harvard University reported that only 16 percent of adults age eighteen to thirty read a daily newspaper, compared with 35 percent of those thirty-six and older. Patterson predicts that the future of news will be in the electronic digital media rather than the traditional print or television forms.

These young people are not abandoning the daily newspaper for a stroll in the woods to explore nature. Conservation biologist Oliver Pergams at the University of Illinois recently found a highly significant correlation between how much time people spend with new technology, such as video gaming, Internet surfing, and video watching, and the decline in per capita visits to national parks.

Digital Natives are snapping up the newest electronic gadgets and toys with glee and often putting them to use in the workplace. Their parents’ generation of Digital Immigrants tends to step more reluctantly into the computer age, not because they don’t want to make their lives more efficient through the Internet and portable devices but because these devices may feel unfamiliar and might upset their routine at first.

During this pivotal point in brain evolution, Natives and Immigrants alike can learn the tools they need to take charge of their lives and their brains, while both preserving their humanity and keeping up with the latest technology. We don’t all have to become techno-zombies, nor do we need to trash our computers and go back to writing longhand. Instead, we all should help our brains adapt and succeed in this ever-accelerating technological environment.

IT’S ALL IN YOUR HEAD

Every time our brains are exposed to new sensory stimulation or information, they function like camera film when it is exposed to an image. The light from the image passes through the camera lens and causes a chemical reaction that alters the film and creates a photograph.

As you glance at your computer screen or read this book, light impulses from the screen or page will pass through the lens of your eye and trigger chemical and electrical reactions in your retina, the membrane in the back of the eye that receives images from the lens and sends them to the brain through the optic nerve. From the optic nerve, neurotransmitters send their messages through a complex network of neurons, axons, and dendrites until you become consciously aware of the screen or page. All this takes a miniscule fraction of a second.

Perception of the image may stir intense emotional reactions, jog repressed memories, or simply trigger an automatic physical response—like turning the page or scrolling down the computer screen. Our moment-to-moment responses to our environment lead to very particular chemical and electrical sequences that shape who we are and what we feel, think, dream, and do. Although initially transient and instantaneous, enough repetition of any stimulus—whether it’s operating a new technological device, or simply making a change in one’s jogging route—will lay down a corresponding set of neural network pathways in the brain, which can become permanent.

Your brain—weighing about three pounds—sits cozily within your skull and is a complex mass of tissue, jam-packed with an estimated hundred billion cells. These billions of cells have central bodies that control them, which constitute the brain’s gray matter, also known as the cortex, an extensive outer layer of cells or neurons. Each cell has extensions, or wires (axons) that make up the brain’s white matter and connect to dendrites allowing the cells to communicate and receive messages from one another across synapses, or connection sites.

The brain’s gray matter and white matter are responsible for memory, thinking, reasoning, sensation, and muscle movement. Scientists have mapped the various regions of the brain that correspond to different functions and specialized neural circuitry. These regions and circuits manage everything we do and experience, including falling in love, flossing our teeth, reading a novel, recalling fond memories, and snacking on a bag of nuts.

The amount and organizational complexity of these neurons, their wires, and their connections are vast and elaborate. In the average brain, the number of synaptic connection sites has been estimated at 1,000,000,000,000,000, or a million times a billion. After all, it’s taken millions of years for the brain to evolve to this point. The fact that it has taken so long for the human brain to evolve such complexity makes the current single-generation, high-tech brain evolution so phenomenal. We’re talking about significant brain changes happening over mere decades rather than over millennia.

YOUNG PLASTIC BRAINS

The process of laying down neural networks in our brains begins in infancy and continues throughout our lives. These networks or pathways provide our brains an organizational framework for incoming data. A young mind is like a new computer with some basic programs built in and plenty of room left on its hard drive for additional information. As more and more data enter the computer’s memory, it develops shortcuts to access that information. Email, word processing, and search engine programs learn the user’s preferences and repeated keywords, for which they develop shortcuts, or macros, to complete words and phrases after only one or two keys have been typed. As young malleable brains develop shortcuts to access information, these shortcuts represent new neural pathways being laid down. Young children who have learned their times tables by heart no longer use the more cumbersome neural pathway of figuring out the math problem by counting their fingers or multiplying on paper. Eventually they learn even more effective shortcuts, such as ten times any number simply requires adding a zero, and so on.

In order for us to think, feel, and move, our neurons or brain cells need to communicate with one another. As they mature, neurons sprout abundant branches, or dendrites, that receive signals from the long wires or axons of neighboring brain cells. The amount of cell connections, or synapses, in the human brain reaches its peak early in life. At age two, synapse concentration maxes out in the frontal cortex, when the weight of the toddler’s brain is nearly that of an adult’s. By adolescence, these synapses trim themselves down by about 60 percent and then level off for adulthood. Because there are so many potential neural connections, our brains have evolved to protect themselves from “over-wiring” by developing a selectivity and letting in only a small subset of information. Our brains cannot function efficiently with too much information.

The vast number of potentially viable connections accounts for the young brain’s plasticity, its ability to be malleable and ever-changing in response to stimulation and the environment. This plasticity allows an immature brain to learn new skills readily and much more efficiently than the trimmed-down adult brain. One of the best examples is the young brain’s ability to learn language. The fine-tuned and well-pruned adult brain can still take on a new language, but it requires hard work and commitment. Young children are more receptive to the sounds of a new language and much quicker to learn the words and phrases. Linguistic scientists have found that the keen ability of normal infants to distinguish foreign language sounds begins declining by twelve months of age.

Studies show that our environment molds the shape and function of our brains as well, and, it can do so to the point of no return. We know that normal human brain development requires a balance of environmental stimulation and human contact. Deprived of these, neuronal firing and brain cellular connections do not form correctly. A well-known example is visual sensory deprivation. A baby born with cataracts will not be able to see well-defined spatial stimuli in the first six months of life. If left untreated during those six months, the infant may never develop proper spatial vision. Because of ongoing development of visual brain regions early in life, children remain susceptible to the adverse effects of visual deprivation until they are about seven or eight years old. Although exposure to new technology may appear to have a much more subtle impact, its structural and functional effects are profound, particularly on a young, extremely plastic brain.

Of course, genetics plays a part in our brain development as well, and we often inherit cognitive talents and traits from our parents. There are families in which musical, mathematical, or artistic talents appear in several family members from multiple generations. Even subtle personality traits appear to have genetic determinants. Identical twins who were separated at birth and then reunited as adults have discovered that they hold similar jobs, have given their children the same names, and share many of the same tastes and hobbies, such as collecting rare coins or painting their houses green.

But the human genome—the full collection of genes that produces a human being—cannot run the whole show. The relatively modest number of human genes—estimated at twenty thousand—is tiny compared with the billions of synapses that eventually develop in our brains. Thus, the amount of information in an individual’s genetic code would be insufficient to map out the billions of complex neural connections in the brain without additional environmental input. As a result, the stimulation we expose our minds to every day is critical in determining how our brains work.

NATURAL SELECTION

Evolution essentially means change from a primitive to a more specialized or advanced state. When your teenage daughter learns to upload her new iPod while IM’ing on her laptop, talking on her cell phone, and reviewing her science notes, her brain adapts to a more advanced state by cranking out neurotransmitters, sprouting dendrites, and shaping new synapses. This kind of moment-to-moment, day-in and day-out brain morphing in response to her environment will eventually have an impact on future generations through evolutionary change.

One of the most influential thinkers of the nineteenth century, Charles Darwin, helped explain how our brains and bodies evolve through natural selection, an intricate interaction between our genes and our environment, which Darwin simply defined as a “preservation of favorable variations and the rejection of injurious variations.” Genes, made up of DNA—the blueprint of all living things—define who we are: whether we’ll have blue eyes, brown hair, flexible joints, or perfect pitch. Genes are passed from one generation to the next, but occasionally the DNA of an offspring contains errors or mutations. These errors can lead to differing physical and mental attributes that could give certain offspring an advantage in some environments. For exam...

Table of contents

• Cover
• Title Page
• Dedication
• Contents
• Acknowledgments
• Part One
• Part Two
• Part Three
• Part Four
• Part Five
• Part Six
• Part Seven
• Part Eight
• Part Nine
• Appendix
• Notes
• Searchable Terms
• About the Authors
• Other Books by Gary Small, M.D.
• Credits
• Copyright
• About the Publisher