School of Thinking

Ten Facts About Your brain …

Posted on March 7th, 2008 by Michael

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Facts:
1 • Your brain weighs about 3 pounds (1,300-1,400 g).

2 • Your brain has about 100,000,000,000 (100 billion) neurons.

3 • The total surface area of your cerebral cortex is about 2500 sq. cm

4 • Unconsciousness will occur after 8-10 seconds after loss of blood supply to your brain.

5 • Neurons multiply at a rate 250,000 neurons/minute during early pregnancy.

6 • You have 12 pairs of cranial nerves.

7 • You have 31 pairs of spinal nerves.

8 • There are about 13,500,000 neurons in your spinal cord.

9 • You can hear in the range of 20 Hz to 20,000 Hz.

10 • There are 1,000 to 10,000 synapses for your “typical” neuron.

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One Response to “Ten Facts About Your brain …”


  1. George Kruszewski Says:

    The optic nerve contains 1.2 million nerve fibers. This number is low compared to the roughly 100 million photoreceptors in the retina, and implies that substantial pre-processing takes place in the retina before the signals are sent to the brain through the optic nerve. (Wikipedia)
    Do eyes block 99% of reality, in favour of current memes, perceptions?
    We see what we want to see and resist reality which changes our mind.