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3 Cards in this Set
- Front
- Back
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General attachments, innervations, blood supply, and actions of the muscles of Pectoralis major
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Attachments: arises from the anterior surface of the sternal half of the clavicle and as low as the 7th rib. End in a flat tendon which is inserted into the lateral lip of the bicipital groove of the humerus
Innervations: medial and lateral pectoral nerve Blood Supply: pectoral branch of the thoracoacromial trunk Function: flexion, adduction, and medial rotation of humerus, and deep inspiration |
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General attachments, innervations, blood supply, and actions of the muscels of Pectoralis minor
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Attachment: outer surface of 3rd to 5th rib. Pass upward to form a flat tendon that is inserted into the medial border and upper surface of the coracoid process of the scapula
Innervation: medial and lateral pectoral nerve Blood Supply: pectoral branch of the thoracoacromial trunk Function: depresses point of the shoulder, drawing scapula inferior and medially towards the thorax |
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What are the effects of a lesion to the nerves innervating the muscles of the anterior chest wall?
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Atrophy of pectoral muscle, inability to flex and adduct the humerus; difficulty in deep inspiration
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