UPPER NINE SPINAL NERVES. 489 



prostate of the male; and, in place of the two latter in the fe- 

 male, upon the vagina and the uterus. 



The last sacral ganglion detaches downwards one or more 

 filaments, which lie upon the front of the os coccygis, and 

 anastomose with the corresponding filaments from the-other 

 side, to form a sort of arch, the convexity of which is down- 

 wards. In this manner, terminates the chord of the sympa- 

 thetic nerve. 



CHAPTER III. 



OF THE NERVES OF THE MEDULLA SPINALIS. 



THE nerves of the medulla spinalis, with the exception of 

 the first, which, from its position, is generally called the Sub- 

 occipital by anatomists, are arranged into cervical, dorsal, lum- 

 bar, and sacral, according to the order of the inter-vertebral 

 foramina, through which they pass out: but a much better di- 

 vision would be Cervical,* Thoracic, and Abdominal. Their 

 mode of origin, and the ganglions formed by them, have been 

 pointed out in the account of the medulla spinalis. 



SECT. I OF THE UPPER NINE SPINAL NERVES. 



These are spent upon the neck, upon the upper extremities, 

 and upon the diaphragm. They consist in the Sub-occipital 

 Nerve, the Cervical, and the First DorsaL 



Of the Sub-occipital Nerve. 



The Sub-occipital Nerve (Nervus Infra-occipitalis, decimus 

 cerebri) is one of the smallest that proceeds from the medulla 



* In this case, the term Cervical would include the first eight. 



