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Amazing Facts

Fun facts about human brain





  1. Average dimensions of the adult brain: Width = 140 mm/5.5 in,
    Length = 167 mm/6.5 in, Height = 93 mm/3.6 in.

  2. How much does human brain weigh? At birth our brains weigh
    and average of 350-400g (about 4/5 lbs), as adults the brain
    averages 1300-1400g (about 3 lbs).

  3. If Stretched out the cerebral cortex would be 0.23 sq.
    m(2.5sq.ft), the area of a night table.

  4. Total surface area of the cerebral cortex is 2,500 cm2 or 2.69
    sq.ft.


  5. Composition


  6. The composition of the brain = 77-78% water, 10-12% lipids, 8%
    protein, 1% carbs, 2% soluble organics, 1% inorganic salt.

  7. The breakdown of intracranial contents by volume (1,700 ml,
    100%): brain = 1,400 ml (80%); blood = 150 ml (10%);
    cerebrospinal fluid = 150 ml (10%).

  8. The cerebellum contains half of all the neurons in the brain
    but comprises only 10% of the brain.

  9. The cerebral cortex is about 85% of the brain.

  10. Percentage of total cerebral cortex volume = frontal lobe 41%,
    temporal lobe 22%, parietal lobe 19%, occipital lobe 18%.

  11. There are about 100 billion neurons in the human brain, the
    same number of stars in our galaxy.

  12. The left hemisphere of the brain has 186 million more neurons
    than the right hemisphere.

  13. 750-1000ml of blood flow through the brain every minute or
    about 3 full soda cans.

  14. In that minute the brain will consume 46cm3 (1/5 cups) of
    oxygen from that blood.

  15. Of that oxygen consumed, 6% will be used by the brain's white
    matter and 94% by the grey matter.

  16. Times


  17. The brain can stay alive for 4 to 6 minutes without oxygen.
    After that cells begin die.

  18. The slowest speed at which information travels between neurons
    is 416 km/h or 260 mph, thats as "slow" as todays supercar's top
    speed (the Bugatti EB 16.4 Veyron clocked at 253 mph).

  19. 10 seconds is the amount of time until unconsciousness after
    the loss of blood supply to the brain.

  20. Time until reflex loss after loss of blood supply to the
    brain, 40-110 seconds.

  21. During early pregnancy the rate of neuron growth is 250,000
    neurons a minute.

  22. Other Fun Facts About The Human Brain


  23. Results from cognitive tests show 30% of 80-year-olds perform
    as well as young adults.

  24. Your brain is about 2% of your total body weight but uses 20%
    of your body's energy.

  25. The energy used by the brain is enough to light a 25 watt
    bulb.

  26. More electrical impulses are generated in one day by a single
    human brain than by all the telephones in the world.

  27. How much does human brain think? 70,000 is the number of
    thoughts that it is estimated the human brain produces on an
    average day.

  28. After age 30, the brain shrinks a quarter of a percent (0.25%)
    in mass each year.

  29. Albert Einsteins brain weighed 1,230 grams (2.71 lbs),
    significantly less then the human average of 1,300g to 1,400g (3
    lbs).

  30. Each year Americans consume 50 billion aspirin tablets or 15.5
    million tons.

  31. 89.06 is the percentage of people who report normally writing
    with their right hand, 10.6% with their left and 0.34% with
    either hand.





   
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