13+ Things You Never Knew About Your Brain

I'm the engine that keeps you running all day long, and I'm here to share the mysteries of how I really work.

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I have a lot on my plate: 100 billion nerve cells.

I have a lot on my plate: 100 billion nerve cells.
So you might want to take a moment before you blame me for not being fast enough, failing to get easy math right, or even forgetting your friend's birthday. It's not really my fault: Information travels through me between the rates of 0.5 meters per second and 120 meters per second. Even though I weigh about three pounds, I’m a fuel guzzler that uses 20% of your body’s energy.

Google is making me weak.

Google is making me weak.
A 2011 study from Columbia University found that you've been relying more on the Internet, less on me. That means I'm going to forget more over time. Study author Betsy Sparrow, PhD suggests we should focus on "greater understanding of ideas and ways of thinking," and less on memorization.

Some of us crave junk food. Some of us don't.

Some of us crave junk food. Some of us don't.
In one study, subjects were shown the names of foods they liked, and the parts of me that got excited were the same parts activated in drug addicts. This may have to do with dopamine, the hormone linked to motivation and pleasure, say researchers. The thinking goes that those with fewer dopamine receptors may need more food to make me happy. 

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There's a powerful link between music, nostalgia, and me.

There's a powerful link between music, nostalgia, and me.
In a 2010 study, researchers found just listening to a meaningful song from childhood brought on a happiness triggered by the fond memories.

I can predict future events.

I can predict future events.
Findings from a 2012 study reveal exciting new evidence that my front-most region, the frontopolar cortex, helps predict future events from past experiences. It's not exactly psychic-superpowers, but I am able to make short-term predictions and think strategically about the future by drawing conclusions from recent patterns. For instance, the study's participants could anticipate slot machine payoffs based on previous trends in the games. 

I get distracted easily when we go shopping.

I get distracted easily when we go shopping.
Two cool new studies: One looked at the MRIs of participants watching deceptive ads (think: late-night infomercials). When I was cloudy from stress, lack of sleep, or low awareness, I was most likely to urge you to buy. Another study on shoppers noticed I may subconsciously push you to more expensive products if attractive, potential mates are nearby, so we impress them. 

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Sometimes, even I think you should trust your gut.

Sometimes, even I think you should trust your gut.
Conscious thought doesn't always lead to the better choice: One study showed students to be happier when they used me for simple decisions, and used their "gut" for more complex ones. In another study, participants let my unconscious state do the grunt work, and they showed less buyer's remorse. So: When you think hard on a big decision (new job), don't get stuck on one of the factors (salary, long-term potential, location, et cetera) and instead, sleep on it.

Brain games might not do much for me. Seriously.

Brain games might not do much for me. Seriously.
In a recent study, 11,430 volunteers aged 18 to 60 completed a series of online tasks for a minimum of 10 minutes a day, three times a week, for six weeks. Even though participants improved at the tasks, researchers believe that there wasn't a boost in general memory and learning abilities. Want to get sharp in your downtime? Listen to more music: Stanford University researchers found that it helps me better organize chaos, pay attention, make predictions, and update memory.

I get stimulated easily, and not by what you might expect.

I get stimulated easily, and not by what you might expect.
A 2011 study in Addiction Biology found that frequent tanning will fire off the same "reward" response for me as drug addiction (ie, I  want to do it again and again). Ditto for binge eating, being popular on Facebook (!), or other obsessive activities. Find healthy ways to stimulate me: exercise, spending time with friends, treating yourself to a day of relaxation.

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Ladies: I'm more moody with you. Sorry.

Ladies: I'm more moody with you. Sorry.
Physically, I'm about ten percent larger in men than women. It doesn’t make guys smarter, it just lets me control their different bodies. Neurologically, it’s more common for women to suffer from mood disorders—but men are more likely to have ADHD or language disabilities.

I peak in my 20s.

I peak in my 20s.
Memory starts declining at around 27! Even though my ability to function doesn't start deteriorating until as early as 45, we will start losing some of my cells in your 20s. Beat the odds: Eat your way sharp with these seven research-backed foods like blueberries, that help reduce the risk of Alzheimer’s, maintain your memory, and boost my acetylcholine levels (which helps improve memory function).

Drinking yourself stupid? It's all myth.

Drinking yourself stupid? It's all myth.
Yes, alcohol disrupts brain function and hurts motor activity, like speaking or walking in a straight line. But it doesn’t kill off entire cells; and adults who drink in moderation do not risk losing brain cells. As a bonus, a glass of red wine a night might protect me from stroke damage, according to a 2010 study.

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You can train me to be less impulsive.

You can train me to be less impulsive.
In an isolated 2012 study, researchers found that people in a simulated gambling task could teach themselves to be more cautious bettors. With more research, scientists believe they can help with new developments in treating addiction and impulse-control disorders like ADHD.

Your cell phone scares me.

Your cell phone scares me.
New research from the National Institute of Health showed that less than an hour of cellphone use can speed up my activity in the area closest to the phone antenna. Although the verdict isn't out yet on cell phone usage and cancer, many more studies reveal cellphone radiation to be linked with other disturbances, like sleep problems. Do us both a favor and limit use, or try a headset or earpiece.

Some parts of me never sleep.

Some parts of me never sleep.
It's important for you to get a good night's sleep, even if I'm busy: Sleep helps stabilizes memories. It also may help me process them, by encoding the emotional bits and ditching the unnecessary details to remember the order of events. 

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I can be reprogrammed to be happier.

I can be reprogrammed to be happier.
In one study, adults classified as pessimists showed higher death rates over a 30-year period than those who were optimists. To rewire me to become more optimistic, take positive actions! Recent research shows that genes play only a 30 to 40% role in your life outlook, and you can shift from being a pessimist to an optimist over time.

Meditation is groovy.

Meditation is groovy.Photodisc/Thinkstock
A recent report found that those who meditated for about 30 minutes a day for eight weeks showed significant changes in my parts linked to memory, sense of self, empathy, and stress. Try silently repeating a calming word again and again to prevent distracting thoughts from inundating your brain, or focus on your breathing to be more in the moment.

I can trick you into thinking busy means fit.

I can trick you into thinking busy means fit.
But being swamped at the office or home isn’t the kind of activity I need to stay healthy. People lose concentration by being immobile; exercise helps me rewire and shield against Alzheimer’s disease, among many other health benefits. Help me by fitting in at least three to five sessions of cardio for 30 minutes a week. Can’t swing that? Walk to work, park your car farther from the supermarket, take the stairs, or try dozens of other ways to get more movement in your day.

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Here's what I like you to eat: omega-3s, vitamin B, complex carbs, antioxidants.

Here's what I like you to eat: omega-3s, vitamin B, complex carbs, antioxidants.
Omega-3 fatty acids help my intellectual performance. Choline (the fat-like B vitamin in eggs and other foods) minimizes fatigue and increases my alertness without a trip to the closest Starbucks. It also helps with memory and stress resistance. Complex carbs are useful to improve my mental performance. 

Laughter really is the best medicine for me.

Laughter really is the best medicine for me.
My amygdala and hippocampus (two parts linked to depression) light up when I hear laughter, as does my nucleus accumbens, which is a key player in pleasurable feelings. Chuckling reduces stress hormones and lowers blood pressure too, decreasing your chance of heart attack and stroke. In one 2012 study, researchers found an increase in oxytocin (also known as the “love hormone”, which enhances my reward centers), when subjects listened to infant laughter. This may just explain the YouTube popularity of laughing baby videos.

I get better with exercise.

I get better with exercise.
Exercise helps more than just keeping your bones strong and heart pumping. Art Kramer, from the University of Illinois, found that memory—one component of my many functions that declines with age—can improve with treadmill usage just three days a week, working up to an hour a day. Exercise increases blood flow to me, which delivers vital oxygen and glucose. MRIs revealed that areas pivotal for decision-making, planning, and multitasking also improved in those who went on the treadmill.

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Watch your blood pressure.

Watch your blood pressure.
There's a large body of research connecting high blood pressure and how I function. Hypertension (high blood pressure) puts a constant stress on me and your cardiovascular system, and it can physically be spotted on MRIs as white matter lesions. Don’t ignore warning signs like having a “high-normal” reading, blood pressure creeping up slowly, or only getting high readings at the doctor’s office.

Prevent (or better manage) diabetes to keep me healthy.

Prevent (or better manage) diabetes to keep me healthy.
In June 2012, a nine-year longitudinal study showed that participants with diabetes who didn't control their blood sugar levels suffered from cognitive decline. Take control of your diabetes or prevent the disease completely by swapping everyday foods high in sugar for healthier choices, staying active with exercise, and seeing your doctor regularly.

Sources: “The Odd Brain: Mysteries of Our Weird And Wonderful Brains Explained,” Reader’s Digest Magazine, Emotion, USA Today, New York Times, Science , NewsObserver.com, Addiction Biology, NPR.org, PsychCentral.com, faculty.washington.edu, brainfacts.org, Boston.com, PsychologyToday.com, BMJ.com, bbc.co.uk, news.columbia.edu, prevention.com, nature.com, cbsnews.com

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19 thoughts on “13+ Things You Never Knew About Your Brain

  1. THE KNOWLEDGE IN SIDE THE BRAIN IS MIND ABOUT A THING, UN KNIWN ABOUT THAT THING IS IN THE EXTERNAL WORLD AS KNOWLEDGE IN THE ABUNDANCE.

  2. #7, you SHOULD trust your gut.  

    Read the Gift of Fear, by Gavin de Becker.  

  3. Relying more on the internet makes the brain weaker?  If I already had the “answer” in my head, I wouldn’t be using Google…  Back in  my day we had to remember where things were located in a stack of old dusty books that hadn’t been updated in 20 years when we wanted to find out something; we didn’t need an unlimited supply of information and ideas at our fingertips making our brains weak….

  4. Re “Some parts of me never sleep, line 3, you wrote: “Sleep helps stabilizes memories.” Shouldn’t it be “Sleep helps stabilize…”?  

  5. Would texting more reduce the risks as well as headphones or less usage?

  6. I survived a Stroke a year ago. I very slowly type (with 1 finger in the afternoon), no memory and so. I am what at doc says 1 in a million since few if any focus on what I can do- like this, smell taste and so on.p If you’de like to more you can reach me by e-mail that this magazine (Reader’s Digest) has. Good bye and god Bless
    Greg in NM

    1. I too am a stroke survivor. I am retraining my brain to things I have never done before. It is really exciting. I can’t wait to start learning something new. It is like I have erased the bad habits with the loss of memory. So I make new memories that are different. It is like learnin from your grandchildren. Don’t say “we didn’t do it that way” say isn’t that interesting. Keep on learning
      Paulette in Alabama

  7. It seems that circulation of blood is more important.
    America as always will be late accepting the idea.

  8. It seems that circulation of blood is more important.
    America as always will be late accepting the idea.

  9. An article backuu with a big name. The study fails to mention the realities of society. Understanding of ideas is the key.

  10.  The article says that “the study’s participants could anticipate slot machine payoffs based on previous trends in the games.”  But if the slot machine payoffs are random, this makes no sense. And if they are not random, they are not “games of chance,”

    1. Incorrect.  Games of chance can be predictable.  Typically they are.  Human behavior, for example, is highly dynamic, subject to chance, and yet we can predict human behavior with varying reliability.  

      1.  Andrew you can believe that if you want. A coin flip cannot be predicted. The coin can come up heads 100 times in a row or any other combination. There is no predictability. Humans are predictable, some more than others. Scam artists use this against us all the time, mostly they use our greed to scam us out of our money.

        1. actually, a coin is more likely to come up tails.  they way its designed makes the “face” (heads side) heavier, and more likely to land face (heads) down.

          No, it won’t land tails-up every time (obviously), but there is a slightly greater chance for it coming up ‘tails’.

          1. Good counterpoint, PJ.  There is random chaos in some instances, but know the physics that make certain situations less random and lend some predictability.  Basic training for oddsmakers, loan amortization specialists and con artists.

    2. Out of pure curiosity, my son and I flipped a quarter several hundred times, a while back. We didn’t initially plan to spend that much time flipping the quarter, but it actually became very interesting as it progressed. I had predicted what (PJ, who commented below) states; that the “heads side” would tend to fall face-down more often, due to a weight imbalance. However, I was wrong, and so was my son! We found that a trend would appear initially, which suggested a tendency for the coin to land on one side or the other, but given enough tosses, the coin showed no statistical preference, regarding which side it would land on.
      If you have an hour, with nothing else to do; you can verify this for yourself. Otherwise, you could just take my word for it. What are the chances that I’m wrong?

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