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Updated: Mar 12, 2026

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Unilateral Variation in Extensor digitorum longus muscle.

A Banerje1, S Singh2, K Raza3

  • 1Junior Resident, Department of Anatomy, A.I.I.M.S. New Delhi, Delhi, India.

La Clinica Terapeutica
|November 16, 2016
PubMed
Summary

A rare unilateral variation of the extensor digitorum longus (EDL) muscle was discovered in an adult male cadaver. This anatomical anomaly involved a split EDL tendon, offering potential applications in reconstructive surgery and understanding leg compartment syndrome.

Keywords:
Extensor digitorum longus muscleLegTendon

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Area of Science:

  • Anatomy
  • Human Morphology
  • Surgical Anatomy

Background:

  • Anatomical variations are crucial for understanding human morphology.
  • The extensor digitorum longus (EDL) is a key muscle in the anterior compartment of the leg.
  • Routine dissections provide valuable insights into anatomical anomalies.

Purpose of the Study:

  • To document and describe a rare unilateral variation of the extensor digitorum longus (EDL) muscle.
  • To highlight the clinical significance of this anatomical variation.

Main Methods:

  • A routine dissection of an adult embalmed male cadaver was performed.
  • The anterior compartment of the left leg was meticulously examined for muscular and tendinous variations.

Main Results:

  • A unilateral variation of the extensor digitorum longus (EDL) muscle was identified in the left leg.
  • The EDL tendon exhibited a split in the anterior compartment, forming a common tendon before the ankle, which then divided into four slips for the lateral four toes.

Conclusions:

  • This anatomical variation of the EDL tendon has implications for diagnosing and treating conditions like compartmental syndrome.
  • The split EDL tendon can potentially be utilized as a graft in tendon replacement surgeries.
  • The anomaly may enable precise toe movements, warranting further investigation.