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9 Cards in this Set
- Front
- Back
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pectoralis minor
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O=ant. surface of ribs 3-5
I=coracoid process of scapula A=w/ribs fixed, draws scapula forward & downward; w/scapula fixed, draws rib cage superiorly (inspiration) N=medial pectoral nerve (C6-C8) |
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subclavius
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O=costal cartilage of rib 1
I=clavicle A=helps stabilize & depress pectoral girdle N=nerve to subclavius (C5-C6) |
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serratus anterior
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O=ribs 1-8 or 9
I=vertebral border & inf. angle of scapula A=rotates scapula upward & laterally; elevates ribs when scapula is fixed; abduction & raising of arm (pushing & punching); called "boxer's muscle" N=long thoracis nerve (C5-C7) |
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trapezius
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O=occipital bone, ligamentum nuchae, & spines of C7 & all thoracic
I=continuous insertion along acromion & spine of scapula & lat. third of clavicle A=elevates clavicle & shoulder girdle; adducts, rotates upward, elevates, or depresses scapula; helps extend head N=CN XI and C3-C4 |
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levator scapulae
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O=transverse processes of C1-C4
I=sup. vertebral border of scapula A=elevates scapula in concert w/trapezius & slightly rotates it downward N=dorsal scapular nerve & C3-C5 |
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minor rhomboid
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O=spinal processes of C7 & T1
I=medial border of scapula A=retracts scapula ("squaring shoulders"); rotates scapulae so that glenoid cavity rotates downward (as when arm is lowerd against resistance); stabilizes scapula N=dorsal scapular nerve (C5) |
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major rhomboid
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O=spinal processes of T2-T5
I=medial border of scapula A=retracts scapula ("squaring shoulders"); rotates scapulae so that glenoid cavity rotates downward (as when arm is lowerd against resistance); stabilizes scapula N=dorsal scapular nerve (C5) |
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serratus posterior
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O=spinous processes and supraspinous ligaments of C7-T2
I=post. aspect of ribs 2-5 A=assists forced inspiration (not muscle of shoulder girdle) N=ant. primary rami (T2-5) |
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levatores costarum
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O=transverse processes C7-T11
I=post. surface & angle of rib below A=elevates ribs (not muscle of shoulder girdle) N=post. primary rami |
