362 A MANUAL OF ANATOMY. 



of the lateral cutaneous branches of the intercostal nerves 

 at the side, and the dorsal branches from the same source 

 along the spine. The arteries are minute branches from 

 the intercostals and the other vessels which will appear 

 later. 



The Deep Fascia. 



This is a well-marked layer of dense connective tissue 

 which covers in all the structures of the back. Above, it 

 is attached to the base of the occipital bone along the supe- 

 rior curved line, and to the mastoid process of the temporal 

 bone ; laterally, in the neck, it becomes the outer layer of 

 the deep cervical fascia, and is attached to the transverse 

 processes of the cervical vertebrae ; in the middle line it is 

 attached to the spinous process of all the vertebrae from the 

 skull to the coccyx, in the neck forming the ligamentum 

 nuchae ; back of the shoulder it is attached to the spine 

 and acromion process of the scapula, and becomes continu- 

 ous with the fascia covering the deltoid ; lower down it 

 covers in the latissimus dorsi muscle, and at its anterior 

 border becomes continuous with the axillary fascia (see 

 page 268) ; below it is attached to the crest of the ilium, 

 and above the bone reaches around the body, covering in 

 the external oblique muscle. 



DISSECTION. 

 Remove the deep fascia, exposing the first layer of muscles. 



The Trapezius. Fig. 77. 



Origin. From the inner third of the superior curved 

 line of the occipital bone and occipital protuberance, from 

 all the spines of the cervical vertebrae by means of the liga- 

 mentum nuchae, from the spines of all the dorsal vertebrae 

 and the supraspinous ligament. 



