Muscles of the Back

Second layer of muscles of the back. Labels: 1, trapezius; 2, a portion of the ten dinous ellipse formed by the trapezius on both sides; 3, spine of scapula; 4, latissimus dorsi; 5, deltoid; 6, infra-spinatus and teres minor; 7, external oblique; 8, gluteus medius; 9, gluteus magnus; 10, levator scapulae; 11, rhomboideus minor; 12, rhomboideus major; 13, splenius capitis; 14, splenius colli; 15, portion of origin of latissimus dorsi; 16, serratus inferior posticus; 17, supra-spinatus; 18, infra-spinatus; 19, teres minor; 20, teres major; 21, long head of triceps extensor cubiti; 22, serratus major anticus; 23, internal oblique.

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