Your Necktop Computer: Facts

  • Brain Facts:

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

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

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

  • Total surface area of your cerebral cortex is about 2500 sq. cm.

  • Unconsciousness occurs 10 seconds after loss of blood supply.

  • You have 12 pairs of cranial nerves.

  • You have 31 pairs of spinal nerves.

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

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


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