how fast do messages travle through our nerval system

Question: how fast do messages travle through our nerval system
- Keywords:
  action potential,
  nerve cell,
  nervous system
Asked by minecraftguy to Sam on 22 Nov 2012.
- Sam Godfrey answered on 22 Nov 2012:
  
  I think I read that they travel at an average of 20mph, which is about 9 meters a second. But I know that the fastest are more than 100m per second or 225mph! It all depends on the thickness of the nerves and whether they are covered in something calledmyelin which insulates the nerve and speeds up the signal.

Question: how fast do messages travle through our nerval system