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Author2 Posts
  #1

I have a question about lesion at spinal cord. If someone injury spinal cord at C5 level. How is segmental sign lesion of C5? Loss all sensation at C5 dermatome or just some of them?

Thank



  #2

You mean total transection? Then in term of sensory, everything is gone below the segment of transection.

If you are talking about hemisection, then irl its not totally black and white. If you want to fit the symptoms in the system, then hemisection will result in, at the segment of lesion, loss of both sense of pain/temp, tactile, propioception ipsilateral to the site of lesion at the injured segment; and contralateral loss of pain/temp distal to the site of lesion, ispilateral loss of propio/tactile ipsilateral distal to the site of lesion.

However, again, it's not that simple, some pain/temp don't decussate directly at the entry to the spinal cord but accend then decussate, some even decussate first in the cervical region, so you MAY lose some pain/temp ipsilaterally to the site of lesion below the segement of transection as well. Unconcious pripio eg. spinocerebellar is even more complicated.

Motor is another story as well.

Edited by Jackofknives on 04/29/07 - 01:43 PM

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