TRACHELO-MASTOID MUSCLE. 



627 



processes of the upper dorsal vertebrae (from four to six), and is 

 'in.<r~rt>:d into the po-terior tubercles of the transverse processes of 

 the cervical vertebrae except the first and the last. 



The TRACHELO-MASTOID MUSCLE (transversalis capitis ; fig. 191, and to head 

 c arises in common with the preceding, and receives additional 

 from the articular processes of the lower three or four cervical 



FIG. 191. DISSECTION OF THE MUSCLES BENEATH THE SPLENIUS. 



Semispinalis dorsi. 



A. Longissimus dorsi. 



B. Trausversalis colli. 

 c. Trachelo-mastoid. 

 D. Complexus. 



F. Splenius capitis, cut. 



G. Splenius colli, cut. 



a. Occipital artery. 



1. Great occipital nerve. 



2. External branch of the second 

 nerve. 



3. Outer branch of the third nerve. 



vertebrae. It is inserted beneath the splenius capitis into the 

 posterior margin of the mastoid process, where it is about three 

 quarters of an inch wide. 



The SPINALIS DORSI is a special innermost part of the erector Spinalis 

 spiuse ; it is very narrow, and springs from the tendinous slips of 

 the erector which arise from the lower dorsal and upper two or 

 three him bar spines. Its fibres are inserted into a variable number insertion 

 (from four to nine) of the upper dorsal spines. 



dorsi : 



