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Related Experiment Videos

Musculocutaneous nerve entrapment: a case report

R Swain1

  • 1West Virginia University-Charleston Division 25301, USA.

Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine
|July 1, 1995
PubMed
Summary

Isolated musculocutaneous nerve injuries, though rare, are increasingly reported. Two distinct syndromes exist: a mixed motor/sensory lesion and a pure sensory lesion affecting the forearm.

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Area of Science:

  • Neurology
  • Orthopedic Surgery

Background:

  • Atraumatic isolated musculocutaneous nerve injuries are uncommon but reported with increasing frequency.
  • These injuries present distinct clinical syndromes.

Observation:

  • Two distinct syndromes involve the musculocutaneous nerve: a proximal lesion causing mixed motor/sensory deficits and a distal sensory lesion.
  • Proximal lesions manifest as biceps weakness (potentially coracobrachialis) and forearm numbness.
  • Distal lesions (lateral cutaneous nerve syndrome) present with forearm numbness and elbow crease tenderness.

Findings:

  • Diagnosis of proximal lesions relies on specific muscle weakness patterns and sensory examination.
  • Lateral cutaneous nerve syndrome is identified by sensory changes and localized tenderness.
  • Treatment for mixed lesions involves 8-12 weeks of rest; sensory lesions may be treated with splinting, injections, or decompression.

Implications:

  • Accurate diagnosis of these distinct syndromes is crucial for appropriate management.
  • Understanding the specific nerve involvement guides targeted therapeutic interventions.
  • Further research into treatment efficacy for lateral cutaneous nerve syndrome is warranted.

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