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10 Cards in this Set
- Front
- Back
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Trapezius
(Upper Fibers) |
O: external occipital protuberance
Superior nuchal line Ligamentum nuchae I: lateral one-third of clavicle N: CN XI – spinal accessory A: elevation of scapula Rotates head & neck (opp. side) Lateral flexion (same side) |
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Trapezius
(Middle Fibers) |
O: spinous process of lower cervical and upper thoracic vertebrae
I: acromion process and spine of scapula N: CN XI – spinal accessory A: adduction of scapula (retraction) Stabilizes |
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Trapezius
(Lower Fibers) |
O: spinous processes of lower thoracic vertebrae
I: medial (and base) of spine of scapula N: CN XI – spinal accessory A: depression and adduction of scapula |
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Rhomboid Major & Minor
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O: lower ligamentum nuchae and spinous processes of C7-T5
I: medial border of scapula from base of spine to inferior angle N: dorsal scapular A: adduction (retraction), elevates, and downward rotation of scapula |
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Levator Scapula
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O: transverse processes of upper four cervical vertebrae
I: superior angle of scapula N: dorsal scapular A: elevation and downward rotation of scapula rotate neck to same side and laterally flex the neck (fixed scapula) |
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Supraspinatus
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O: supraspinous fossa
I: superior facet on the greater tubercle of humerus N: suprascapular nerve A: essential for normal abduction of arm Stabilizes head of humerus by pulling over top of head |
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Infraspinatus
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O: infraspinous fossa
I: middle facet on greater tubercle of humerus N: suprascapular nerve A: rotates arm laterally, adduction, horizontal abduction, extension Stabilizes head of humerus |
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Teres Minor
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O: superior ½, lateral border of infraspinous fossa of scapula
I: inferior facet on greater tubercle of humerus N: axillary A: rotates arm laterally, adduction, horizontal abduction, extension Stabilizes head of humerus |
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Teres Major
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O: lower 1/2 border of dorsal surface of scapula near inferior angle
I: crest of lesser tubercle of humerus N: lower subscapular A: adduction and medial rotation, extension from flexed position Stabilizes proximal end of humerus during abduction |
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Latissimus Dorsi
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O: crest of ilium
Lower 3-4 ribs Spinous process of lower 6 thoracic vertebrae All lumbar and upper sacral spines via thoracolumbar fascia Inferior angle of scapula I: floor of intertubercular groove of humerus N: thoracodorsal A: adduction, extension, and medial rotation of arm elevate trunk & pelvis (fixed humerus) |
