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Actions of Pectoralis Minor
depress the scapula, abduct (protract) the scapula, downwardly rotate the scapula, with scapula fixed, elevate the thorax during forced inhalation.
Actions of Pectoralis Major
Adduct the shoulder, medially rotate the shoulder, assist to elevate the thorax during forced inhalation. Flex the shoulder, horizontally adduct the shoulder, lower fibers extend the shoulder
Actions of Rhomboids
Adduct (retract) the scapula, elevate the scapula
Attachments of Pectoralis Minor
Origin: ribs 3 through 5, insertion: coracoid process of the scapula.