The pectoralis minor is a thin, triangular muscle, situated at the upper part of the chest, beneath the pectoralis major in the human body.
Together with the pectoralis major, they are commonly known as the pectorals or “pecs”.
The pectoralis minor has several actions which are primarily responsible for movement of the scapula (shoulder blade) — drawing the scapula forwards and downwards:
- Protraction (abduction) of the scapula, moving the scapula away from the spine during prostration of the shoulder girdle, forwards and away the midline of the body.
- Downward (inferior) rotation of the scapula, moving the inferior angle of the scapula forwards (medially) and downwards.
- Depression, moving the scapula down — the downwards (inferior) movement of the shoulder girdle .
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