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9 Cards in this Set
- Front
- Back
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pectoralis major
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O=clavicle, sternum, cartilages of ribs 1-6, and aponeurosis of external oblique
I=greater tubercle of humerus A=prime mover of arm flexion N=lat. & med. pectoral nerves |
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latissiumus dorsi
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O=spines of lower 6 thoracic & vert., lumabar vert, crests of sacrum & ilium, lower 4 ribs
I=intertubercular sulcus of humerus A=prime mover of arm extension; adducts & rotates arm medially; draws arm downward & backward; important in the power stroke N=thoracodorsal |
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deltoid
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O=acromial extremity of clavicle & acromion & spine of scapula
I=deltoid tuberosity of humerus A=ant-flexes & medially rotates humerus; middle-chief abductor of humerus; post-extends & laterally rotates humerus N=axillary nerve (C5-C6 |
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subscapularis
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O=subscapular fossa of scapula
I=lesser tubercle of humerus A=chief medial rotator of humerus; stabilizes shoulder joint N=subscapular nerve (C5-C7) |
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supraspinatus
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O=supraspinatus fossa of scapula
I=sup. part of greater tubercle of humerus A=stabilizes shoulder joint; assists deltoid in abducting arm N=suprascapular nerve |
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infraspinatus
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O=infraspinatus fossa of scapula
I=greater tubercle of humerus A=rotates arm laterally; adducts arm N=suprascapular nerve |
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teres minor
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O=lat. border of dorsal scapular surface
I=greater tubercle of humerus A=rotates arm laterally; extends and adducts arm N=axillary nerve |
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teres major
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O=post. surface of scapula at inf. angle
I=intertubercle sulcus of humerus A=extends, medially rotates, and adducts humerus; synergist of latissimus dorsi N=lower supscapular nerve |
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coracobrachialis
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O=coracoid process of scapula
I=medial surface of humerus shaft A=flexes & adducts arm; synergist of pectoralis major; prevents shoulder dislocations N=musculocutaneous nerve |
