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An axillary arch

M Yüksel1, E Yüksel, S Sürücü

  • 1Faculty of Medicine, Department of Anatomy, Marmara University, Istanbul, Turkey.

Clinical Anatomy (New York, N.Y.)
|January 1, 1996
PubMed
Summary

A rare axillary arch (axillopectoral muscle) was found connecting the latissimus dorsi and pectoralis major muscles. Additionally, the pectoralis major muscle showed an unusual complete insertion into the deltoid tendon.

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Area of Science:

  • Anatomy
  • Human Morphology
  • Surgical Anatomy

Background:

  • The axillary arch, or axillopectoral muscle, is an anatomical variation.
  • Variations in the pectoralis major muscle insertion are infrequently reported.
  • Understanding these variations is crucial for surgical procedures in the shoulder and chest regions.

Purpose of the Study:

  • To document and describe an observed axillary arch.
  • To report an unusual complete insertion of the pectoralis major muscle into the deltoid tendon.
  • To contribute to the anatomical literature regarding variations in the pectoral and axillary regions.

Main Methods:

  • Gross anatomical dissection of a 48-year-old male cadaver.
  • Observation and documentation of muscular variations.
  • Detailed examination of the axillary arch and pectoralis major muscle insertion.

Main Results:

  • An axillary arch was identified, extending between the latissimus dorsi and pectoralis major muscles.
  • The pectoralis major muscle demonstrated a complete insertion into the distal part of the deltoid muscle's tendon.
  • These findings represent significant anatomical variations.

Conclusions:

  • The presence of an axillary arch and the aberrant pectoralis major insertion highlight the importance of recognizing anatomical variations.
  • Such variations can have implications for surgical planning and interpretation of imaging studies in the thoracic and shoulder girdle.
  • Further studies are warranted to determine the prevalence of these specific combined variations.

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