Bilateral Chondroepitrochlearis Muscle: Incidence, Phylogenetic And Clinical Significance
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Correspondence
R HANNAH SUGIRTHABAI RAJILA
M.S., Assistant Professor,
Department of Anatomy, Chettinad Hospital & Research Institute, IT Highway, Kelambakkam,
Kanchipuram District, Tamil Nadu – 603103, India. Email- ashrajsanada@gmail.com
Phone- 9791178269
To study the incidence and the phylogenetic and the clinical implications of a rare variant muscle slip arising from the pectoralis major muscle in the Indian population.. In this article, we have described a muscle slip which is present bilaterally, which originates from the lower ribs along with the lower fibres of the pectoralis major muscle. This muscle slip arches across the axilla and then inserts to the medial epicondlye of the humerus. The phylogenetic relationship of the muscle to the abdomino humeralis or to the xiphihumeralis in quadrapeds and to the patagii muscle in birds is discussed. The clinical significance of this muscle is also discussed, as the chondro epitrochlearis muscle forms an important differential diagnosis for ulnar nerve entrapment. It is also an important but a rare cause of the restriction of movements at the shoulder joint.