Trapezius Muscle Anatomy The trapezius (or trapezoid) is a large paired surface muscle that extends longitudinally from the occipital bone to the lower thoracic vertebrae of the spine and laterally to the spine of the scapula. It moves the scapula and supports the arm. The descending (superior), ascending (inferior), and middle sections make up the…
Subclavius Muscle Anatomy The subclavius is a small triangular muscle, placed between the clavicle and the first rib. Along with the pectoralis major and pectoralis minor muscles, the subclavius muscle makes up the anterior wall of the axilla. Origin The subclavius muscle originates from the first rib. Specifically, this muscle begins in the area between…
Pectoralis minor muscle Anatomy The pectoralis minor muscle is triangular in shape and is located under the pectoralis major, and both form the anterior wall of the axilla. Origin It originates from the, Insertion It inserts on the medial border and upper surface of the coracoid process. Nerve supply It is supplied by the medial…
