Subclavius muscle

Subclavius muscle is a small triangular muscle, located in the upper chest region beneath the clavicle, playing a crucial role in the functioning of the shoulder. It originates from the first rib and inserts into the lower surface of the clavicle.

Anatomy

The Subclavius muscle is a small muscle situated at the junction of the thorax and upper limb. It is triangular in shape and lies beneath the clavicle, or collarbone. The muscle originates from the first rib and its costal cartilage and inserts into the groove on the under surface of the clavicle.

Function

The primary function of the Subclavius muscle is to stabilize the clavicle in its position. It depresses the lateral clavicle, drawing it downward and forward. This action is important in movements where the arms are extended above the head.

Clinical significance

Injury or strain to the Subclavius muscle can result in pain and limited range of motion in the shoulder. It can also contribute to conditions such as thoracic outlet syndrome and pectoralis minor syndrome.

See also

• List of muscles of the human body
• Thoracic outlet syndrome
• Pectoralis minor syndrome

References

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