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Kaplan Qbank USMLE



Author2 Posts
  #1

Why is there flaccid paralysis in lower motor neuron lesion but spastic paralysis in upper motor neuron lesion???

thanks in advance.

  #2

lmn lesion- loss of inervation to the muscles so there is no resistance whatsoever to any movments- flaccid

umn lesion-lmn innervation is still intact to there is mild resistance at first and then later becomes more flaccid- spastic paralysis








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