104 



TOPOGRAPHICAL ANATOMY OF THE 



M. RECTUS CAPITIS DORSALIS MAJOR. — The greater dorsal straight 

 muscle of the head is flattened and narrow. Its origin is from the 

 border of the spinous process of the epistropheus, and its insertion is 

 into the occipital bone in company with the m. semispinalis capitis. 

 A very little care in dissection will show that, at its origin, the muscle 

 consists of two strata, a long superficial part more or less blended with 

 the semispinal muscle, and a shorter deep portion. 



M. frontoscutularis. -_<rl 



M. interscutularis 



M. temporalis. 

 Middle levator. 



Rotators. 

 ^Long abductor. 



Short levator. 

 Long levator 



M. splen 



M. rhomboideus 

 cervicalis. 



M. obliquus capitis cranialis. 



M. obliquus capitis caudalis. 



, M. semispinalis capitis. 



--M. longissimus capitis. 

 - M. brachiocephalicus. 



Fig. 42. — Dissection of the occipital region. First i left) and second (right) stages. 



M. OBLIQUUS CAPITIS CAUDALIS. — The caudal oblique muscle is 

 strongly developed. Its fibres arise from the lateral aspect of the 

 spinous process and the caudal articular process of the epistropheus, and 

 run in an oblique cranio-lateral direction to be inserted into the dorsal 

 surface of the wing of the atlas. 



M. OBLIQUUS CAPITIS CRANIALIS. — The cranial oblique muscle is 

 very much shorter, merely filling the narrow interval between the atlas 

 and the skull. The muscle arises from the cranial edge of the wing of 

 the atlas and the adjacent part of fossa atlantis. Its insertion is to 



