922 



NEUROLOGY 



and the Semispinalis capitis. A filament from the branch to the Obliquus inferior 

 joins the posterior division of the second cervical nerve. 



The nerve occasionally gives off a cutaneous branch which accompanies the occipital artery 

 to the scalp, and communicates with the greater and lesser occipital nerves. 



FIQ. 801. Diagram of the distribution of 

 the cutaneous branches of the posterior 

 divisions of the spinal nerves. 



Fio._ 802. Areas of distribution of the cutaneous branches of the 

 posterior divisions of the spinal nerves. The areas of the medial 

 branches are in black, those of the lateral in red. (H. M. Johnston.) 



The posterior division of the second cervical nerve is much larger than the 

 anterior division, and is the greatest of all the cervical posterior divisions. It 

 emerges between the posterior arch of the atlas and the lamina of the axis, below 

 the Obliquus inferior. It supplies a twig to this muscle, receives a communicating 

 filament from the posterior division of the first cervical, and then divides into a 

 large medial and a small lateral branch. 



