pectorodorsalis muscle

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.

Synonym(s): axillary arch muscle, axillary arch, Langer arch, Langer muscle, pectorodorsal muscle