Anatomy
Origin:
Junction of first rib and costal cartilage.
Insertion:
Inferior surface of middle third of clavicle in subclavian groove.
Key Relations:
-Separated posteriorly from the first rib by the subclavian vessels and brachial plexus.
-Its insertion is located between the costoclavicular and conoid ligaments.
Functions
Stabilises the clavicle in the sternoclavicular joint during shoulder activity.
Supply
Nerve Supply
Nerve to the subclavius (C5, C6) (this is a small branch from the brachial plexus).
Blood Supply:
-Clavicular branch of thoracoacromial trunk
-Suprascapular artery.
Clinical
Fracture of the clavicle is one of the most common fractures in the body. The subclavius muscle protects the underlying neurovascular structures such as the brachial plexus and subclavian vessels from a fractured clavicle.
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