DISSECTING MANUAL. 



DEEP MUSCLES. 

 First Group. 



Splenius. Origin; ligamentum nuchae below fourth cer- 

 vical vertebra; spines of last cervical and upper four to six 

 thoracic vertebra?. Course ; separates in two parts. Splenius 

 capitis (upper part): Insertion; mastoid process; cuter part 

 of superior curved line of occipital. Splenius colli (lower 

 part) : Insertion ; posterior tubercles of the upper three or four 

 cervical transverse processes. [392] 



Second Group. 



Cervicalis Ascendens (prolongs the Accessorius) . Origin; 

 six upper ribs, by six slips. Insertion ; posterior tubercles of 

 transverse processes of fourth to sixth cervical vertebrae, be- 

 hind the Scalenus posticus. [393] 



Transversalis Cervicis (prolongs the Longissimus dorsi). 

 Origin; transverse processes of upper six thoracic vertebrae. 

 Insertion ; posterior tubercles of second to sixth cervical trans- 

 verse processes. [394] 



Trachelo-mastoid (prolongs the Longissimus dorsi). Ori- 

 gin; transverse processes of upper six thoracic vertebras; ar- 

 ticular processes of lower four cervical vertebrae. Insertion ; 

 mastoid process. [395] 



Complexus. Origin; transverse processes of upper six 

 thoracic and lower four cervical vertebrae ; spine of last cervical 

 vertebra. Insertion; occipital, between superior and inferior 

 curved lines. The inner part is separate, as the Biventer 

 cervicis, with two bellies and an intervening tendon. [395] 



Third Group. 



Semispinalis Colli. Origin; transverse processes of upper 

 six thoracic vertebrae ; articular processes of lower four cervi- 

 cal vertebra?. Insertion; spines of second to fifth cervical 

 vertebrae. [395] 



[104] 



