342 



DR. C. F. SONNTAG ON THE ANATOMY, 



The seonispinalis (text-fig. 34 B) has an origin from the arti- 

 cular processes of the lower five cervical vertebrfe by broad bands, 

 and from the transverse processes of all dorsal vertebia^ the lower 

 five origins being tendinous. It is inserted into the spinous 

 processes of cervical vertebrae two to six by muscle fibres 

 (semispinalis colli) and to the seventh cervical and first three 

 dorsal spines by tendons (semispinalis dorsi). It is practically 



Text-figure 34. 



Muscles of the back. A : complexus ; B : semispinalis and suboccipital muscles. 

 A. A : postevior arch of atlas ; C.No and C.N3 : posterior divisions of the 

 second and third cervical nerves ; Lo.C : longus colli ; S.C : spinalis ; S.O.T : 

 suboccipital triangle. Other letters in text. 



impossible to distinguish accurately the limits between these 

 muscles in the combined origins. 



A well-marked muscular slip runs from the third articular 

 process to the transverse process of the atlas and forms a triangle 

 with the inferior oblique and semispinalis (text-fig. 34, A.O.T). 

 It alters the course of the second and third cervical nerves. The 

 mass of the transverse process of the atlas separates it from the 



