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Kaplan Qbank USMLE



Author4 Posts
  #1

Does anybody know why the extension of index and middle fingers is lost in CTS?

Thanks


  #2

the median nerve control the first and second lumbricals which function is to flex digits 2, 3 at the metacarpophalangeal joints and also extend interphalangeal joints of digits 2, 3

___________________
fight possessed

  #3

usuaaly one get only sensory symptoms and in severe cases APB weakness. Lumbrical weakness quite rare but can occur. Vallia's explanation tells the reason.

HP


  #4

Thanks Vallia.

This also explains the claw hand in ulnar nerve injury.








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