axillary arch


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pec·to·ro·dor·salis mus·cle

an anomalous muscle or tendinous slip that passes across the axilla from the pectoralis major to insert with the latissimus dorsi onto the humerus. Thought to be a vestige of the panniculus carnosus muscle of lower mammals.

axillary arch

An anomalous muscular slip across the axilla, between the pectoralis major and latissimus dorsi muscles.
See also: arch