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Related Experiment Videos

Painful extensor digitorum brevis manus muscle.

M R Patel1, S S Desai, L Bassini-Lipson

  • 1Department of Orthopedics, Hand Surgery Service, Maimonides Medical Center, Brooklyn, N.Y.

The Journal of Hand Surgery
|July 1, 1989
PubMed
Summary

Pain in the extensor digitorum brevis manus muscle may stem from compression within the wrist's fourth dorsal compartment. Surgical release of the extensor retinaculum is the recommended treatment for this condition.

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Area of Science:

  • Anatomy
  • Orthopedics
  • Surgical Pathology

Background:

  • The extensor digitorum brevis manus (EDBM) muscle is an anatomical variant located on the dorsum of the hand.
  • Understanding the EDBM's location and biomechanics is crucial for diagnosing hand pain.

Observation:

  • Ten EDBM muscles were identified in seven patients presenting with hand pain.
  • The EDBM is most prominent with the wrist flexed to 30 degrees and fingers extended.
  • Pain is hypothesized to result from EDBM compression within the rigid fibro-osseous fourth dorsal compartment.

Findings:

  • Diagnosis of EDBM was confirmed in symptomatic patients.
  • Compression within the fourth dorsal compartment is proposed as the etiology of EDBM pain.
  • Extensor retinacular release is identified as the primary treatment modality.

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Implications:

  • This study clarifies the anatomical basis for EDBM-related hand pain.
  • It highlights the importance of considering the EDBM in differential diagnoses of dorsal wrist pain.
  • Surgical intervention via extensor retinacular release offers a targeted treatment approach.