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Subclavius

Other Terms: Musculus subclavius, Muscle subclavier

Muscle parts

None

Latin name

Musculus subclavius

Latin muscle parts

None

Group

Pectoral girdle muscle

Etymology

In English, this muscle’s name literally translates as the muscle under the key. The Latin prefix sub- meaning “under” is added to the Latin clavis meaning “key.” The Latin term clavis was used to describe the clavicle because of fancied resemblance of this bone to an ancient key.

Origin

Superior surface of the junction of the first rib with its costal cartilage.

Insertion

Groove on the inferior surface of the middle portion of the clavicle.

Action

By depressing the lateral end of the clavicle it assists the pectoralis minor and the rhomboideus major with downward rotation of the glenoid cavity of the scapula. It possibly also helps to brace the clavicle against the sternum.

Nerve supply

Nerve to subclavius (C5 and C6)

Blood supply

Suprascapular artery and thoraco-acromial artery via its clavicular branch.

Latin

Musculus subclavius

French

Muscle subclavier

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