The thoracoacromial trunk (acromiothoracic trunk, thoracoacromial artery) is a branch of the axillary artery.
|Branches:||Pectoral, acromial, clavicular, deltoid|
|Arterial supply:||Pectoralis minor, pectoralis major, the breast, deltoid, acromioclavicular joint, sternoclavicular joint, subclavius|
|Search for Thoracoacromial trunk in Gray's.|
The thoracoacromial trunk is a branch of the second part of the axillary artery. It is a relatively short branch which soon divides into its own branches. It arises behind pectoralis minor, traversing its medial border to pierce the clavipectoral fascia and divide into its branches.
There are four branches: the pectoral, acromial, clavicular and deltoid.
Descends medially between the pectoral muscles to enter the breast tissue.
Crosses the coracoid process beneath the deltoid, before piercing the muscle and ending on the acromion.
Moves superiorly and medially between the clavicular head of pectoralis major and the clavipectoral fascia.
In addition the acromial and deltoid branches anastamose with each other.
Arterial Supply to