Name
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.