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Confirmation of the diagnosis can be done by blocking the pectoralis minor muscle or injecting botulinium. [5] First-line treatment for patients with PMS but without TOS is self-stretching of the pectoralis minor muscle. [6] Other treatments include injection of botulinium, or surgery that cuts the pectoralis minor tendon. [7] [8] [2]
Pectoralis minor muscle (/ ˌ p ɛ k t ə ˈ r æ l ɪ s ˈ m aɪ n ər /) is a thin, triangular muscle, situated at the upper part of the chest, beneath the pectoralis major in the human body. It arises from ribs III-V; it inserts onto the coracoid process of the scapula. It is innervated by the medial pectoral nerve.
Pectoralis minor is a thin, triangular muscle located beneath the pectoralis major. It attaches to the ribs, and serves to stabilize the scapula, the large bone of the shoulder. The pectoral fascia is a thin layer of tissue over the pectoralis major, extending toward the latissimus dorsi muscle on the back.
The axillary artery is often referred to as having three parts, [1] with these divisions based on its location relative to the pectoralis minor muscle, which is superficial to the artery. First part – the part of the artery superior to the pectoralis minor; Second part – the part of the artery posterior to the pectoralis minor
It then enters the deep surface of the pectoralis minor muscle, where it divides into a number of branches, which supply the muscle. Two or three branches pierce the muscle and end in the sternocostal head of the pectoralis major muscle. The medial pectoral nerve pierces both the pectoralis minor and the sternocostal head of the pectoralis ...
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It arises opposite the lower border of the pectoralis minor. [1] It provides motor innervation to the muscles of the anterior compartment of the arm: the coracobrachialis, biceps brachii, and brachialis. [2] It provides sensory innervation to the lateral forearm (via its terminal branch). [3]
The thoracoacromial artery (acromiothoracic artery; thoracic axis) is a short trunk that arises from the second part of the axillary artery, its origin being generally overlapped by the upper edge of the pectoralis minor.