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FIGURE 13 PECTORALIS MINOR

The pectoralis minor is a small but important muscle beneath the pectoralis major. It originates on the third to fifth ribs and inserts at the coracoid process. The coracoid process is part of the scapula (shoulder blade), but reaches forward, underneath the clavicle (collar bone), to the anterior aspect of the rib cage.

As it contracts, the pectoralis minor moves the shoulder forward. It works together with the serratus anterior in performing Chaturanga Dandasana, but it is the prime mover of the shoulder during the transition into Upward Dog and the jump through into the sitting postures.

A permanent collapsing of the shoulders forward indicates a tight pectoralis minor muscle.