Do nerves grow back after injury or not?

  1. I've understood that if somebody gets paralyzed as result of injury to the spine, then there is no change of recovery if the injury has been bad enough. (Recovery can occur if the injury is sufficiently mild.) When I've asked about why don't the nerves grow back, I've learned that it simply is the case that they don't grow back.

    But then I see stuff like this: First double arm transplant patient recovering well

    If nerves grow back to arms, then why not the the spine too?
  2. jcsd
  3. Astronuc

    Staff: Mentor

    Peripheral nerves do regenerate. I know this from personal experience - after I sliced into my left thumb. Initially there was numbness around the deep cut. After a couple of years or so, the feeling had more or less completely returned.

    Then there is this:
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