February 07, 2012
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MuscleOriginInsertionActionNerve
trapeziusexternal occipital protuberance (EOP); medial side of superior nuchal line; nuchal ligament; SPs of C7-T12lateral 1/3 of clavicle; acromion; spine of scapulastabilization of scapula; elevation scapula; upward rotation of scapula (upper fibers); downward rotation of scapula (lower fibers); retraction (adduction) of scapula; lateral flexion of head (unilateral); extension of head (bilateral)spinal accessory (CN XI), ventral rami of C2-C4
latissimus dorsiSP T7-L5; thoracolumbar fascia; iliac crest; posterior sacrum, ribs 9-12; inferior angle of scapula (occasionally)medial lip of bicipital groove of humerusadduction, medial rotation & extension of humerus; anterior pelvic tilt, elevation of pelvis; depression of scapula; downward rotation of scapulathoracodorsal nerve (C6, C7, C8)
levator scapulaeTP of C1-C4medial border of scapula (superior part)elevation of scapula; extension & lateral flexion of neckdorsal scapular nerve (C3, C4, C5)
rhomboid majorSPs of T2-T5; supraspinous ligamentmedial border of scapula from scapular spine to inferior angleretraction (adduction) of scapula; elevation & downward rotation of scapuladorsal scapular nerve (C4-C5)
rhomboid minorSPs of C7 & T1; ligamentum nuchae; supraspinous ligamentmedial border of scapula (medial angle/root of spine)retraction (adduction) of scapula; elevation & downward rotation of scapuladorsal scapular nerve (C4-C5)
serratus posterior inferiorSPs of T11-L2ribs 9-12 (inferior external border)depression of ribsintercostal & sub costal nerves
serratus posterior superiorSPs of C7-T3ribs 2-5 (superior external border)elevation of ribsintercostal & sub costal nerves
©Dr. Nikita Vizniak. All Rights Reserved
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