the pectoralis minor is located deep beneath the pectoralis major muscle.
the pectoralis minor is located deep beneath the pectoralis major muscle.
the pectoralis minor is located deep to which muscle?
beneath the pectoralis major
pectoralis minor









































the pectoralis minor () is a thin, triangular muscle, situated at the upper part of the chest, beneath the pectoralis major in the human body.









































section::::structure.









































it arises from the upper margins and outer surfaces of the third, fourth, and fifth ribs, near their cartilages and from the aponeuroses covering the intercostalis.









































the fibers pass superior and lateral and converge to form a flat tendon, which is inserted into the medial border and upper surface of the coracoid process of the scapula.









































section::::structure.:relations.
pectoralis minor
the first surgical patient was a bilateral shoulder disarticulation amputee. both arms were entirely amputated at the shoulder level, with only the shoulder blades remaining. the pectoral muscles were chosen targets because they were close to the shoulder, and they were also biologically non-functional due to detachment from the amputated arm. the pectoral muscles were first denervated by cutting the original nerves that innervate them. the proximal ends of the original nerves were ligated to prevent them from reinnervating the pectoral muscle. then the remnant arm nerves (brachial plexus) were transferred into the pectoral muscles. the musculocutaneous nerve was transferred to the clavicular head of the pectoralis major muscle; the median nerve was transferred to the upper sternal of the pectoralis major muscle; the radial nerve was transferred to the lower sternal head of the pectoralis major muscle. the pectoralis minor muscle was translocated from under the pectorialis major muscle to the lateral chest wall, so that its emg signals would not interfere with those of the pectoralis major muscle, and it is also a fourth muscle target. the ulnar nerve was then transferred to the moved pectoralis minor muscle. the musculocutaneous, median, radial, and ulnar nerves (brachial plexus) were sewn onto the distal ends of the original pectoral muscle nerve fascicles and onto the muscle itself. subcutaneous fat over the pectoral muscle was removed so that the electrodes can be as close to the muscle as possible to obtain optimal emg signals.
targeted reinnervation