Muscles 1-5 - • Insertion Medial border of scapula •...

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Muscles 1-5
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Trapezius Origin: Superior nuchal line, external occipital protuberance, spinous processes of thoracic vertebrae Insertion: Upper – lateral clavicle; middle – acromion; lower – medial scapular spine Action: Elevates, retracts, and depresses scapula Innervation : Accessory (11 th cranial nerve, C3, C4)
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Latissimus Dorsi Origin: spinous processes of T6-S5 Insertion: Bicipital groove of humerus Action: extension, adduction, IR of arm Innervation : thoracodorsal nerve
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Rhomboid Major Origin: spinous processes of T2-T5
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Unformatted text preview: • Insertion: Medial border of scapula • Action: retracts and stabilizes scapula • Innervation : dorsal scapular nerve Rhomboid Minor • Origin: spinous processes of C7-T1 • Insertion: Medial border of scapula • Action: retracts and stabilizes scapula • Innervation : dorsal scapular nerve Levator Scapulae • Origin: Transverse processes of C1-C4 • Insertion: Medial border of scapula above spine • Action: elevates medial border of scapula • Innervation : dorsal scapular nerve...
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