Prevalence of ulnar-to-median nerve motor fiber anastomosis (Riché-Cannieu communicating branch) in hand: An electrophysiological study

Authors

  • Lobat Majidi Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
  • Masood Yavari Panzdah Khordad Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
  • Tannaz Ahadi Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
Abstract:

Background: Two main muscles studied in the hand for evaluation of median nerve injuries are opponens pollicis (OP) and abductor pollicis brevis (APB). However, Riché-Cannieu communicating branch (RCCB) may limit the use of these muscles in electrodiagnosis. This condition is confusing in the case of median nerve injuries. This study was conducted to evaluate the prevalence of RCCB.   Methods: Twenty-three consecutive cases of complete median nerve injury were studied. Evoked responses via stimulation of median and ulnar nerves in the wrist and recording with needle in the thenar area were studied.   Results: Of the patients, 82.6% exhibited RCCB.  In 14 (60.8%) cases the OP and in 19(82.6%) cases APB was supplied by the ulnar nerve.   Conclusion: RCCB was detected to be 60.8% in OP and 82.6% in APB, so OP is preferable to APB in the study of median nerve. 

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prevalence of ulnar-to-median nerve motor fiber anastomosis (riché-cannieu communicating branch) in hand: an electrophysiological study

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prevalence of ulnar-to-median nerve motor fiber anastomosis (riché-cannieu communicating branch) in hand: an electrophysiological study

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Journal title

volume 30  issue 1

pages  105- 109

publication date 2016-01

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