[TA] origin, axillary; distribution, muscles and skin of shoulder and upper chest; anastomoses, branches of superior thoracic, internal thoracic, lateral thoracic, posterior and anterior circumflex humeral, and suprascapular. SYN: arteria thoracoacromialis [TA], ramus deltoideus arteriae thoracoacromialis [TA], acromiothoracic artery, thoracic axis (1), thoracoacromial trunk.