INFERIOR CERVICAL GROUP. 



RECTUS CAPITIS ANTICUS MINOR. 



(A tloido-guboccipitaKs. ) 



(Fie. 75. c.) 



This, the short flexor of the head, is situated on the inner and 

 upper side of the preceding muscle, and is short, slender, and 

 almost entirely fleshy. 



Origin. Posteriorly, from the lower part of the body of the 

 atlas. 



Insertion. To the basilar process of the occipital, and body 

 of the sphenoid bone, by the preceding muscle. 



Relation. Infero- externally with the rectus major ; supe- 

 riorly with the capsular ligament of the occipito-atloid articu- 

 lation. 



Action. It assists in flexing the head. 



RECTUS CAPITIS LATERALIS, 



(A tloido-styloideus. ) 



(FiG. 75. 5.) 



This muscle, still smaller than the last and like it in structure, 

 is placed rather more externally. 



Origin. From the inferior part of the ring of the atlas, on 

 the outer side of the rectus minor. 



Insertion. To the styloid process of the occipital bone. 



Relation. Inferiorly with the rectus major : superiorly with 

 the capsular ligament of the occipito-atloid articulation; exter- 

 nally with the parotid gland. 



Action. It assists the preceding muscles, 



SCALENUS. 



(Costo-cervicalis. ) 



(PL. TIL 6.) 



Situated at the postero-inferior part of the region, at the side 

 of the anterior aperture of the thoracic cavity, the scalenus is 

 triangular in shape, and divided into a superior or posterior, and 

 an inferior or anterior portion ; the fibres run forwards and 

 upwards, and form several fleshy masses, with strong tendinous 



