284 



THE SPINAL NERVES. 



The loop is also united by short filaments to the superior cervical ganglion of the 

 sympathetic and to the trunk-ganglion of the vagus. 



Filaments of this nerve are distributed to the articulation of the occipital bone with the 

 atlas, and, according to Valentin, also to the mastoid process of the temporal bone. 



SECOND CERVICAL NERVE 



The anterior division of the second cervical nerve, beginning between the arches 

 of the first two vertebrae, is directed forwards between their transverse processes, 



R.A.M*. 



l(/ 9 SUPRACUAVICUUAR 



Fig. 190. PLAN OF THE CERVICAL PLEXUS AND ITS CONNECTIONS. (Gr. D. T.) 



I to V, anterior divisions of the first to fifth cervical nerves ; Sy, communicating branches to the 

 upper cervical ganglion of the sympathetic ; branches to muscles are indicated as follows : R. L. , 

 rectus lateralis ; R.A.Mi., rectus anticus minor ; R.A.Ma., rectus anticus major ; L.C., longus colli ; 

 St.M., sterno-mastoid ; Sc.A., scalenus anticus ; Sc.M., scalenus medius ; L.S., leva tor scapulae. 



passing round the outer side of the vertebral artery, and beneath the posterior 

 intertransverse and other muscles fixed to those processes. In front of the 



