LATERAL CERVICAL GROUP. 189 



Origin. From the lateral surface and superior spine of the 

 dentata, and the capsular ligament. 



Insertion. To the upper surface of the wing and body of the 

 atlas. 



Relation. Externally with the splenius, trachelo-mastoideus, 

 and complexus major ; internally with the atlas, axis, and the 

 atlo-axoid capsular ligament ; superiorly with the rectus posticus, 

 and inferiorly with the rectus anticus major muscles, 



Action. It is the rotator muscle of the head. 



SPINALIS COLLI. 

 (Dorso-spinalis. ) 



Deep-seated on the side of the neck, it consists of six short 

 fleshy bundles, intersected by tendons, whose fibres extend 

 obliquely upwards and inwards. 



Origin. Posteriorly, from the oblique processes of the first 

 dorsal and the last five cervical vertebrae. 



Insertion. To the neural spines of all the cervical vertebrae 

 but the first. 



Relation. Externally with the complexus major and trachelo- 

 mastoideus ; internally with the ligamentum nuchse and the. 

 vertebrae. 



Action. To extend and curve the neck. 



LNTERTRAXSVERSALIS COLLI. 

 (Intercervicalis. ) 

 (Fie. 73. c c c c.) 



Placed along the lateral part of the cervical vertebras, it 

 consists of six distinct bundles with strong tendinous intersections, 

 the fibres passing obliquely outwards and upwards. 



Origin. The oblique process of one vertebra. 



Insertion. The transverse process of the vertebra in front, 

 filling up the interspaces of all, excepting those of the first and 

 second. 



Relation. With several deep-seated muscles of the neck, the 

 vertebrae, the vertebral artery, and vein. 



Action. -To assist in flexing the neck laterally. 



