Myths About the Brain

1. We use only 10 percent of our brains.

This one sounds so compelling – a precise number, repeated in pop culture for a century, implying that we have huge reserves of untapped mental powers. But the supposedly unused 90 percent of the brain is not some vestigial appendix. Brains are expensive – it takes a lot of energy to build brains during fetal and childhood development and maintain them in adults. Evolutionarily, it would make no sense to carry around surplus brain tissue. Experiments using PET or fMRI scans show that much of the brain is engaged even during simple tasks, and injury to even a small bit of brain can have profound consequences for language, sensory perception, movement or emotion.

True, we have some brain reserves. Autopsy studies show that many people have physical signs of Alzheimer’s disease (such as amyloid plaques among neurons) in their brains even though they were not impaired. Apparently we can lose some brain tissue and still function pretty well. And people score higher on IQ tests if they’re highly motivated, suggesting that we don’t always exercise our minds at 100 percent capacity.

Read more on Smithsonianmag.com

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13 Responses to “Myths About the Brain”

  1. Raphaelly May 31, 2011 2:00 PM #

    Oh really? You believe in fact that our brains are just for the 6 senses, physical commands of the other limbs and for storing memories?
    you have no ideea! and you are still pretty in the mist so that you would understand that we can achieve ANYTHING if we just propose ourself! for example if we can propose ourself something and really we wish to accomplish it, we would dream of it and the next day we after we have experienced the dream, we would be able to do it in real life, like we are learning during the dream. did it ever occured to you? try to remember.

    because to me it happened few times. Have you ever dreamt that you were flying in your dream? that’s he first sign. if not you might still be….banned. you can call me crazy but crazy nowadays is just fine with me!

  2. Raphaelly May 31, 2011 2:01 PM #

    ourselves

  3. Critic May 31, 2011 2:33 PM #

    fail troll is fail.

  4. Ionut Puerava May 31, 2011 2:35 PM #

    Rapheally firts read, and after comment.

    4. We have five senses.

    Sure, sight, smell, hearing, taste and touch are the big ones. But we have many other ways of sensing the world and our place in it. Proprioception is a sense of how our bodies are positioned. Nociception is a sense of pain. We also have a sense of balance—the inner ear is to this sense as the eye is to vision—as well as a sense of body temperature, acceleration and the passage of time.

    Compared with other species, though, humans are missing out. Bats and dolphins use sonar to find prey; some birds and insects see ultraviolet light; snakes detect the heat of warmblooded prey; rats, cats, seals and other whiskered creatures use their “vibrissae” to judge spatial relations or detect movements; sharks sense electrical fields in the water; birds, turtles and even bacteria orient to the earth’s magnetic field lines.

    By the way, have you seen the taste map of the tongue, the diagram showing that different regions are sensitive to salty, sweet, sour or bitter flavors? Also a myth.

  5. Raphaelly May 31, 2011 3:45 PM #

    WHO

  6. lulu May 31, 2011 3:56 PM #

    who sais we only have 5 senses? I don’t have the time now to demonstrate you anything, nor the will since you blog sais I type too quickly :D but we have 6 senses!
    And there is no doubt for me anymore since last year, when,one morning, a person who actually died that morning, came to me! I was between the realm of sleep and awakening. She entered my room, gently rubbed my shoulder saying that I’m late for work. and then just got out the door. I was amazed because I really felt the touch. chills ran all over my body. guess what? half an hour later i received a call. she has just died that very morning. explain that!

  7. lulu May 31, 2011 3:57 PM #

    how nice of u to ban people!

  8. lulu May 31, 2011 5:07 PM #

    you R so limited…

  9. said May 31, 2011 5:07 PM #

    who sais we only have 5 senses? I don’t have the time now to demonstrate you anything, nor the will since you blog sais I type too quickly :D but we have 6 senses!
    And there is no doubt for me anymore since last year, when,one morning, a person who actually died that morning, came to me! I was between the realm of sleep and awakening. She entered my room, gently rubbed my shoulder saying that I’m late for work. and then just got out the door. I was amazed because I really felt the touch. chills ran all over my body. guess what? half an hour later i received a call. she has just died that very morning. explain that!

  10. Ionut Puerava May 31, 2011 6:13 PM #

    drugs?

  11. Critic May 31, 2011 6:54 PM #

    :lol:

  12. paispe net May 31, 2011 8:26 PM #

    Daca doar 10% inseamna ca oricine poate sa fie mai destept decat acum, inclusiv prostii …
    Apropo vad ca ai renuntat sa-i mai faci ceva blogului cum era teaserul ….nu stiu de ce, cateodata cand i se scoala da bad gateway

  13. Ionut Puerava May 31, 2011 8:37 PM #

    daca iti zic cat de ocupat am fost in ultimele 2 sapt si cum luna care incepe de maine va fi un chin continuu, nu o sa ma crezi. efectiv nu am avut timp. dupa cum vezi si in arhiva, media postarilor a scazut cu 50% … si inca e putin ca am mai postat ba o poza, ba o muzica.

    am in draft 11 postari pe care n-am avut timp sa le cosmetizez, sa le corectez & co. revin, oricum. blestemata fie munca, atat am de zis.

    legat de bad gateway, sa-i pis in freza!

    ps: una tare, despre care o sa scriu cand am timp, stii ca au arestat americanii alt bancher smecher ca cica a pipait o camerista? deci teoria conspiratie curge! :D

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