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Suprascapular neuropathy in pitchers.

S P Ringel1, M Treihaft, M Carry

  • 1Department of Neurology, University of Colorado School of Medicine, Denver.

The American Journal of Sports Medicine
|January 1, 1990
PubMed
Summary

Suprascapular neuropathy in pitchers may not always stem from nerve entrapment. Progressive nerve conduction slowing suggests other causes, like vascular issues, could be involved.

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Area of Science:

  • Sports Medicine
  • Neurology
  • Anatomy

Background:

  • Suprascapular neuropathy is a recognized condition in overhead athletes.
  • Nerve entrapment at the suprascapular or spinoglenoid notches is the commonly proposed cause.

Observation:

  • Clinical and electrodiagnostic studies of two professional pitchers revealed denervation of the infraspinatus and/or supraspinatus muscles.
  • Progressive slowing of suprascapular nerve conduction was observed in healthy pitchers as the season advanced.
  • Cadaveric analysis identified five potential sites of suprascapular nerve trauma during the pitching motion.

Findings:

  • Denervation is not exclusively caused by nerve entrapment at specific anatomical notches.
  • Biomechanical and anatomical factors may contribute to progressive, potentially reversible, nerve changes.
  • An alternative hypothesis suggests microemboli, resulting from intimal damage to the axillary or suprascapular artery, may cause suprascapular neuropathy.

Implications:

  • This research challenges the prevailing understanding of suprascapular neuropathy in pitchers.
  • It highlights the need to consider vascular compromise and biomechanical stress as potential causes.
  • Further investigation into these alternative mechanisms could lead to improved diagnostic and treatment strategies for athletes.

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