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Anomalous retrogressive palmaris longus.

Suyashi Sharma1, Ravi Shankar Sharma2, Sonali Adole1

  • 1Department of Anatomy, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India.

Annals of African Medicine
|February 15, 2024
PubMed
Summary
This summary is machine-generated.

A rare variation of the palmaris longus (PL) tendon was observed, featuring two distinct muscle bellies and differing distal insertions. This finding enhances understanding of forearm muscle morphology and its clinical relevance.

Keywords:
Palmaris longustendon graftvariationvolkmann's ischemic contracture

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Area of Science:

  • Anatomy
  • Morphology
  • Human Variation

Background:

  • The palmaris longus (PL) is a superficial forearm muscle originating from the medial epicondyle.
  • It plays a role in wrist flexion and is a common tendon graft source.
  • Understanding its anatomical variations is crucial for medical and evolutionary contexts.

Observation:

  • An unusual unilateral variant of the palmaris longus tendon was identified.
  • This variant presented with two distinct muscle bellies originating from a single common flexor tendon origin.
  • The two bellies subsequently formed two separate long tendons with different distal insertions.

Findings:

  • The observed palmaris longus variant exhibited a unique dual-belly structure.
  • Distinct insertions for each of the two distal tendons were noted.
  • This represents a significant morphological deviation from the typical palmaris longus anatomy.

Implications:

  • These findings contribute to the detailed understanding of palmaris longus morphological variations.
  • Awareness of such anomalies is vital for healthcare practitioners in diagnosing and managing forearm and hand conditions.
  • Knowledge of PL variations is also relevant for evolutionary biology studies.