140 SPECIAL ANATOMY. 



transversi). Ins. : Pars basilaris occipilis. Use: to bend the 

 head somewhat to the side and forwards. 



b. Lateral. 



206. 4. Rectus capitis later alls. 



Pos. : vertical (behind, V. jugularis, before, Art. vertebral.}; 

 behind the pharynx, before obliq. capit super. , to the inside of 

 biventer maxillss. Or. : Proc. transvers. Atlantis, outside the 

 last muscle. Ins.: os occipitis ; between foram. jugular e and 

 stylo-mastoid. Use : bends the head to the side. 



207. 5. Scalenus anticus. 



Pos. : below and behind Muse, and Ven. subclavia, above and 

 behind m. sterno-mastoid, Omo-hyoid., n. phrenicus, art. cerv. 

 trans, and ascend.; before, a triangular space, at the base of 

 which, below, Art. subclavia; in the apex: Plexus brachialis. 

 Internally, Art. vertebr. and m. longus colli ; externally, scalen. 

 ined.; rests upon the apex of the pleura. Or. : Proc. trans, vertebr. 

 3 to 6. Ins. : Costa I. (superior border) even to the centre. Fig. : 

 conical, the apex above. Act. : bends the neck forwards ; or 

 raises the first rib. 



208. 6. Scalenus medius (the strongest of the three 



supporters of the ribs). 



Pos. : behind the last muscle, Art. subclavia and Plex. bra- 

 chialis ; upon it lie : omo-hyoid, and above, the m. Sterno-cleido- 

 mast. Or.: Proc. transv. Vv. 1 to 7 (the anterior tubercles). 

 Ins. : Costa I. (superior border, outside the last muscle), and Costa 

 II. Use : to raise the first and second rib ; to incline the neck 

 laterally ; both fix the neck. 



209. 7. Scalenus posticus. 



Pos. : behind and outside the last muscle, before, cervical, 

 descendens. Or. : Proc. transv. Vv. 5 to 7. Ins. : Costa II. 

 (behind the centre). Use: bends the neck sideways, or raises 

 the second rib. 



Nerves : (1 7) rr. anterior): n. cervicall. 



210. fascia cervicalis. 



Arises from the anterior belly of digastric, as far as the chin, 

 from the os. hyoides, from the lower jaw, below gland, submaxil- 

 lar., to the angle between it and Parotis ; from proc. styloid. and 

 its muscles. Insertion : the superior border of the chest. Posi- 

 tion : covered by platysmam. and jugularis extern. ; upon the 



