why is it when some people hit their head they develop new skills like knowing how to play the piano or a totally new

Question: why is it when some people hit their head they develop new skills like knowing how to play the piano or a totally new language?
- Keywords:
  head,
  skill
Asked by Katie Dixon to Sebastian on 16 Nov 2016.
- Sebastian Gornik answered on 16 Nov 2016:
  
  I think this is a myth and does not happen. It can be though that people with head injuries change substantially after receiving such an injury. The most famous example is Phineas Gage:
  
  http://www.smithsonianmag.com/history/phineas-gage-neurosciences-most-famous-patient-11390067/

Question: why is it when some people hit their head they develop new skills like knowing how to play the piano or a totally new language?