An unusual finding of the pectoralis major muscle: decussation of sternal fibers across the midline
Burley Halle, Georgiev Georgi P., Iwanaga Joe, Dumont Aaron S., Tubbs R. Shane,
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( Burley Halle ) - Western University of Health Sciences College of Osteopathic Medicine
( Georgiev Georgi P. ) - Medical University of Sofia University Hospital Queen Giovanna-ISUL Department of Orthopedics and Traumatology
( Iwanaga Joe ) - Tulane University School of Medicine Department of Neurosurgery
( Dumont Aaron S. ) - Tulane University School of Medicine Department of Neurosurgery
( Tubbs R. Shane ) - Tulane University School of Medicine Department of Neurosurgery
Abstract
Variations of the pectoralis major muscle are commonly seen. However, during the routine dissection of an adult male cadaver, an apparently uncommon muscular variant was identified. In this cadaver, the sternal heads of the left and right pectoralis muscles crossed the midline and interdigitated with one another. In addition, the clavicular heads of both pectoralis major muscles were separated from the remaining parts of the muscles. Such anatomical variants such be kept in mind by clinicians and surgeons during patient evaluation and treatment.
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Pectorais muscles; Anatomic variation; Anatomy; Cadaver
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