Subclavius - Musculus subclavius

Description

Origin: First rib

Insertion: Subclavian groove of clavicle

Artery: Thoracoacromial artery, clavicular branch

Nerve: Nerve to subclavius

Action: Depression of clavicle

Description:
The Subclavius is a small triangular muscle, placed between the clavicle and the first rib. It arises by a short, thick tendon from the first rib and its cartilage at their junction, in front of the costoclavicular ligament; the fleshy fibers proceed obliquely upward and lateralward, to be inserted into the groove on the under surface of the clavicle between the costoclavicular and conoid ligaments.
Variations.—Insertion into coracoid process instead of clavicle or into both clavicle and coracoid process. Sternoscapular fasciculus to the upper border of scapula.Sternoclavicularis from manubrium to clavicle between Pectoralis major and coracoclavicular fascia.


This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).

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