Name

# Subclavius

Pronunciation

(sub-CLA-vee-us)

Origin/Proximal Attachment

First rib about the junction of bone & cartilage

Insertion/Distal Attachment

Lower surface of the clavicle

Action/Relevance

Assists to stabilize the clavicle

Innervation

Nerve to the subclavius (C5, 6)

Notes

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.