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9 Cards in this Set

  • Front
  • Back
pectoralis minor
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)
subclavius
O=costal cartilage of rib 1
I=clavicle
A=helps stabilize & depress pectoral girdle
N=nerve to subclavius (C5-C6)
serratus anterior
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)
trapezius
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
levator scapulae
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
minor rhomboid
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)
major rhomboid
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)
serratus posterior
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)
levatores costarum
O=transverse processes C7-T11
I=post. surface & angle of rib below
A=elevates ribs (not muscle of shoulder girdle)
N=post. primary rami