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7 Cards in this Set
- Front
- Back
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Pectoralis Major
(Clavicular Portion) |
O: sternal ½ of clavicle
I: crest of greater tubercle of humerus N: medial and lateral pectoral nerves A: horizontal adduction, flexion, and medial rotation of humerus |
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Pectoralis Major
(Sternocostal Portion) |
O: anterior surface of sternum
Costal cartilages of upper 6 ribs I: crest of greater tubercle of humerus N: medial and lateral pectoral nerves A: adduction, extension, and medial rotation of humerus |
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Pectoralis Minor
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O: anterior surface of ribs 3-5
I: coracoid process N: medial pectoral nerve A: draws scapula into anterior tilt Raises ribs with forced inhalation (fixed shoulder) |
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Subscapularis
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O: subscapular fossa
I: lesser tubercle of humerus N: upper and lower subscapular nerve A: adduction and medial rotation of arm Stabilizes head of humerus |
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Serratus Anterior
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O: finger-like slips from outer surface of upper 8 ribs
I: costal surface of medial border of scapula N: long thoracic nerve A: scapular abduction (protraction) and upward rotation Holds scapula against thoracic wall |
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Subclavius
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O: first rib and its cartilage
I: groove on the lower surface of the clavicle N: nerve from the brachial plexus (nerve to subclavius) A: draws clavicle inferiorly and anteriorly Elevates first rib (inhalation) Restrains excessive elevation and protraction of clavicle Stabilizes the sternoclavicular joint |
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Rotator Cuff Muscles
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S: Supraspinatus
I: Infraspinatus T: Teres Minor S: Subscapularis |
