206 



THE MUSCLES OF THE UPPER LIMB. 



occasionally given downwards to the long 1 head of the triceps, to the fascia, or to the internal 

 intermuscular septum of the arm, corresponding 1 to the dorto-epttrockloari* muscle of apes and 

 many other mammals : a vestige of this muscle is generally present in man as a fibrous band 



Fig. 226. SUPERFICIAL VIEW OP THE MUSCLKS 



OF THE TRUNK, SHOULDER AND HIP. (Allen 



Thomson, after Bourgery.) | 



o, external occipital protuberance ; C, trans- 

 verse process of the atlas ; D, first dorsal ver- 

 tebra ; L, first lumbar vertebra ; S, first piece 

 of the sacrum ; Co, first piece of the coccyx ; 

 n t acromion ; b. base of the scapula ; i, crest of 

 the ilium ; 1, sterno-tuastoid muscle ; 2, splenius ; 

 3, 3, upper and lower ends of the line of origin 

 of the trapezius muscle ; 3', triangular tendon 

 attached to the inner end of the spine of the 

 scapula ; + , half of the oval tendon in the lower 

 cervical and upper dorsal region ; 4, 4, latis- 

 .sitnus dorsi ; 4', 4", line along which the latis- 

 simus dorsi takes origin from the lumbar fascia ; 

 5, infraspinatus ; 6, teres minor ; 7, teres major ; 

 8, deltoid ; 9, external oblique muscle of the 

 abdomen ; 10, glutens medins, covered by the 

 fascia lata ; 11, 11, line of origin of the glutens 

 maximus from the posterior part of ilium to the 

 coccyx ; 11', its insertion into the fascia lata 

 over the great trochanter ; 11", a part of its in- 

 sertion into the femur ; 12, biceps ; 13, semi- 

 tendinosus ; 14 adductor magnus ; 15, gracilis. 



passing from the lower border of the tendon 

 of the latissimus to the fascia of the arm 

 and the long- head of the triceps. 



The rhomboideus minor, a com- 

 paratively narrow muscle, arises from 

 the spinous processes of the seventh 

 cervical and first dorsal vertebrae and 

 from the ligamentum nuchse. It in- 

 clines downwards and outwards, and is 

 inserted into the base of the scapula 

 opposite the triangular surface at the 

 commencement of the spine. 



The rhomboideus major, much 

 broader than the preceding muscle, lies 

 immediately below and in contact with 

 it. It arises from the spinous processes 

 of the four or five upper dorsal ver- 

 tebrae and the supraspinous ligament, 

 and is inserted into that part of the 

 base of the scapula which is included 

 between the spine and the inferior 

 angle. A considerable part of the 

 attachment at the insertion is only 

 by firm connective tissue, and the 

 greater portion of the fibres, instead 



of being fixed directly to the bone, end in a tendon which is connected 

 to the scapula near the lower angle ; in consequence of this arrangement, 

 the muscle may in part be separated from the bone without division of its 



