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Musculus comitans nervi mediani (M. palmaris profundus)

K Sahinoglu1, M D Cassell, R Miyauchi

  • 1Department of Anatomy, University of Iowa College of Medicine, Iowa City 52242.

Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft
|June 1, 1994
PubMed
Summary

Rare palmaris profundus muscles were discovered in two cadavers, presenting unique anatomical variations. These muscles, closely associated with the median nerve, suggest a potential new classification: "musculus comitans nervi mediani".

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Area of Science:

  • Anatomy
  • Human Anatomy
  • Upper Limb Anatomy

Background:

  • The palmaris longus muscle is a superficial forearm muscle.
  • Variations in forearm muscles can impact anatomical studies and surgical procedures.

Purpose of the Study:

  • To document and describe the rare palmaris profundus muscle.
  • To highlight the anatomical relationship between this muscle and the median nerve.

Main Methods:

  • Routine cadaveric dissection of the upper limb.
  • Gross anatomical observation and description of muscle morphology and relationships.

Main Results:

  • The palmaris profundus muscle was identified in two cadavers.
  • Two distinct forms of the muscle were observed, both differing from the typical palmaris longus.

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  • In both cases, the muscle shared a fascial sheath with the median nerve, and in one instance, the median artery.

    • Conclusions:

    • The palmaris profundus muscle exhibits significant anatomical variations.
    • Its intimate association with the median nerve warrants consideration for a new name, such as "musculus comitans nervi mediani".
    • This finding has implications for understanding forearm anatomy and neurovascular relationships within the carpal canal.