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Muscle Tables Unit 1
WSU SOM Anatomy Unit 1
Muscle | Origin | Insertion | Action | Innervation |
---|---|---|---|---|
Trapezius | Sup. nuchal line, ext. occipital pertuberance, ligament nuchae, spinous processes of C7-T12 | Lateral 1/3 clavicle, acromian, spine of scapula | Elevates, depresses, retracts, and rotates scapula (shrug of shoulders) | Accessory n. (CN 11) |
Latissimus dorsi | Spinous processes of T6-L5, sacrum, iliac crest, ribs 10-12 | Intertubercular groove | Extends, adducts, and medially rotates humerus | Thoracodorsal n. |
Levator scapulae | Transverse processes of C1-C4 | Superior angle of scapula | Elevates scapula | Dorsal scapular n. |
Rhomboid major and minor | Spinous processes of C7-T5 | Medial border of scapula | Retracts and elevates scapula | Dorsal scapular n. |
Deltoid | Lateral 1/3 clavicle (ant fibers) Acromian (mid fibers) Spine of scapula (post fibers) | Deltoid tubersoity | Flexion (ant fibers) Abduction (mid fibers) Extension (post fibers) | Axillary n. |