MUSCLES OF THE ÏBUNK. 



n 



wards and slig-htly backwards^ towards the outer border of the 

 tn. rectus; there they pass into a tendon which, for the most part, 

 runs on the upper surface of the rectus to the linea allja. 



II. Muscles op the Back. 



The muscles of the back are covered by a fascia, the fascia dor- 

 salis (Fig-. 66 fd), attached to the spinous processes of the vertebrae. 

 Anteriorly, where it covers the m. temporalis, it is attached to the 

 frontoparietal and squamosal bones, posteriorly to the superior border 

 of the iliac bones and the extremity of the urostyle. The posterior part, 

 which covers the origins of the 

 m. lonr/issimits (torsi, of the m. 

 coccijgeo-iliacus, and of the 

 cocc^(jeo-lurntjaris, is especially 

 strong". From the anterior 

 part several muscles arise la- 

 terally, viz. a portion of the 

 m. otjliquus atjdoniinatis exter- 

 nns, of the m. latissimus dorsi, 

 and of the m. depressor maxillae 

 inferioris. In the uppermost 

 layer, immediately covered by 

 \he fascia dorsalis, lie the m. 

 cucullaris, the m. retrahens 

 scapulae, the m. latissimns 

 dorsi arising from the fascia 

 itself, and the scapula with 

 its muscles; then come the 

 long muscles of the back ; and 

 in the third and deepest layer 

 the short muscles of the back. 



The individual muscles are as follows : — 



A. Limb Muhcles of the Back (for moving the shoulder- 

 girdle and arm). 

 31. 31. cucullaris (Fig. 66 c). 



Cuvisr, angularis. — Dugès, n. 38, sous-occipito adscapulaire. — Zenker, 

 levator scapulae suhlimis. 



In order to see this muscle, it is necessary to separate the fascia 

 dorsalis from the spines of the vertebrae and to turn it back with 

 the m. depressor maxillae inf. arising from it. It is then seen to 



M. obliquus internus, showing its attachments 

 superiorly. 

 Xiphisternum. 

 Oesophagus. 

 Î1. obliquus internus. 



Fibres of m. obliq. int., which are inserted into 

 the oesophagus. 

 oi'" Fibres of same, which are attached to coracoid 

 and xiphisterntim. 

 Pericardium. 

 M. rectus abdominis. 



