HEAD AND NECK OF THE HORSE 



21 



The more ventral of the two muscles, m. longissimiis otld/ntis, ends 

 in a strong tendon that joins the flattened tendon common to the brachio- 

 cephalic and splenius muscles, and is thus inserted to the wing of the 

 atlas. 



The longlssimus capitis viuscle is inserted into the mastoid part of 

 the temporal bone in common with the splenius. 



Parotid gland. 



2nd cervical i 

 M. splenius. 



M. longissimus capitis. 

 M. longissimus atlantis. 



M. semispinalis capitis. 



M. longissimus cervicis. 

 ■ Ligamentum nuchic. 



Ramus- colli. 

 V. maxillaris externa. 

 M. brachiocephalicus. 



\ M. omohyoideus. 

 V. jugularis. 

 A. carotis communis. 



Mm. intertransversarii. 



M. scalenus. 

 N. phrenicus (roots of). 



Truncus omocervicalis. 

 A. axillaris. 



Brachial plexus. 



Fig. 9.— Dissection of the lateral aspect of tlie neck. Fourth stage. 

 M. SEMISPINALIS CAPITIS.!— Covered by the thin splenius muscle, 



1 In animals like the dog, the semispinalis capitis muscle is readily separated 

 into two parts :— (1) M. bivenfer cervicis, the more dorsal in position, marked by 

 tendinous intersections ; and (2) 31. complexus. The common practice of referring 

 to the semispinalis capitis of the horse as the "complexus" is, therefore, not 

 without objection. 



