The subclavius is a small triangular muscle, placed between the clavicle and the first rib.
The subclavius muscle originates from the first rib. Specifically, this muscle begins in the area between the bone and the cartilage of the first rib. From this location, the subclavius muscle travels outward.
the bottom surface of the middle part of the clavicle. There is a groove in the area of the clavicle where the subclavius inserts.
Nerve supply :-
nerve to subcolavius from upper trunk of brachial plexus .