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Cubital tunnel syndrome pathophysiology

D J Bozentka1

  • 1Department of Orthopaedic Surgery, Hospital of the University of Pennsylvania, Philadelphia 19104, USA.

Clinical Orthopaedics and Related Research
|July 1, 1998
PubMed
Summary

Cubital tunnel syndrome, a common nerve compression, arises from ulnar nerve stress at the elbow. Understanding its anatomy and causes aids diagnosis and treatment.

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Area of Science:

  • Neurology
  • Orthopedics
  • Anatomy

Background:

  • Cubital tunnel syndrome is the second most frequent peripheral compression neuropathy.
  • The ulnar nerve's anatomical position at the elbow makes it susceptible to injury from compression, traction, and friction during movement.
  • Elbow flexion significantly alters the cubital tunnel, decreasing volume by 55% and increasing pressure to over 200 mm Hg.

Purpose of the Study:

  • To elucidate the anatomical and biomechanical factors contributing to cubital tunnel syndrome.
  • To provide a foundation for improved patient evaluation and treatment strategies.

Main Methods:

  • Review of anatomical relationships and biomechanical forces acting on the ulnar nerve during elbow motion.
  • Analysis of pressure and excursion changes within the cubital tunnel.

Main Results:

  • Elbow flexion causes significant changes in the cubital tunnel, including decreased volume and increased intraneural/extraneural pressures.
  • Ulnar nerve excursion and elongation occur with elbow flexion.
  • Factors like repetitive motion, prolonged flexion, and direct compression contribute to cubital tunnel syndrome.

Conclusions:

  • A thorough understanding of the ulnar nerve's anatomy and the pathophysiology of cubital tunnel syndrome is crucial.
  • This knowledge supports accurate patient assessment and guides the selection of effective treatments.

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