Amazing Facts About Our Nerves and Brain

1.) If all the body's nerves were joined end to end they would stretch about 100 km.

2.) A single nerve signal lasts 1/700th of a second.

3.) Most nerve fibres can carry up to 300 signals per second.

4.) The nerve fibres in the human body are less than 1/1000th of one millimetre wide.

5.) The average adult brain has more than 100 billion nerve cells.

6.) The outer layer or cortex of the brain, spread out flat, would cover the area of a pillowcase.

7.) The brain has no sense of touch or pain. During surgery, it cannot feel the surgeon's cutting scalpels or laser beams.