404 MUSCLES. 



dons from the three, four, or five, superior transverse processes 

 of the neck, between the scaleni muscles and the splenius colli. 

 It is inserted, fleshy, into that part of the base of the scapula 

 above the origin of its spine. As its name expresses, it draws 

 the scapula upwards. A good view of this muscle may be ob- 

 tained in the front dissection of the neck.* 



The Splenius, 



Has its inferior extremity beneath the serratus superior pos- 

 ticus, but the principal part of it is covered by the trapezius. 

 It arises from the spinous processes of the five inferior cervical, 

 and of the four superior dorsal vertebrae. 



It is inserted into the back of the mastoid process and into a 

 small part of the adjacent portion of the os occipitis, also into 

 the transverse processes of the two superior cervical vertebras. 

 It is customary to consider)- the part which goes to the head as 

 Splenius Capitis, and the part below as Splenius Colli: the lat- 

 ter, in that case, is said to arise from the third and fourth dor- 

 sal vertebrae. It draws the head and neck backwards. 



Between the spinous processes of the vertebras and the angles 

 of the ribs, on either side, the deep fossa is filled up entirely by 

 muscles. Some of them are large and powerful, and the most 

 striking are the Sacro-Lumbalis and the Longissimus Dorsi. 



The Sacro-Lumbalis and Longisnimus Dorsi, 



Have a common origin from the back of the pelvis and of the 

 lumbar vertebrae, and extend to the top of the thorax. They 

 arise, tendinous posteriorly, and fleshy, anteriorly, from the pos- 

 terior surface of the sacrum by its external margin and spinous 

 processes: they arise, also, tendinous, from the spinous processes, 

 and fleshy, from the ends of the transverse processes of all the 



* Varieties. Sometimes it arises from only two superior transverse processes; 

 occasionally its fasciculi are separated from the neck to the scapula; or, a long one 

 is detached towards the spine, thereby presenting a disposition similar to what 

 is met with in the dolphin. 



f Albinus, loc. cit. 



