If you can still see around 3 seconds after being beheaded, then are you practically still alive for a few seconds even

Question: If you can still see around 3 seconds after being beheaded, then are you practically still alive for a few seconds even though you are headless?
- Keywords:
  death,
  neuroscience
Asked by gloomybear to Kat, Andrew, Katie, Sadaf on 19 Jun 2013.
- Andrew Swale answered on 19 Jun 2013:
  
  it’s not entirely impossible for someone to still be conscious after being decapitated – cut off from the heart (and therefore, from oxygen), the brain immediately goes into a coma and begins to die. Consciousness is probably lost within 2-3 seconds

wonderman commented on 21 Jun 2013:

Does that mean you still feel pain after your head has been severed?

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Question: If you can still see around 3 seconds after being beheaded, then are you practically still alive for a few seconds even though you are headless?