NERVES. 13 



jugula'ris exter*na (draining superficial muscles of back of 

 neck), supra-scapuia'ris , transver'sa. cervi'cis. 



Ante'rior jugula'ris ! drains integument and superficial mus- 

 cles of anterior and middle portion of neck, emptying into 

 subclavian. No valves. 



JnguL'riS Lter'ni: from jugular foramen at junction of lat- 

 eral and inferior petrosal sinus, vertically down the side of 

 neck (outer side of main arteries), uniting with subclavian tc 

 form vena innominata ; i pr. valves, ^ inch above termination. 

 Receives//V/z.r, lingua' Us, pharynge'cz^ superior thyroid*' a t 

 rue 1 dia thyroide'a. 



Vcrtebra'llS : drains occipital region and deep muscles of 

 back of neck ; enters foramen in transverse process of atlas 

 down through similar foramina of the cervical vertebrae to 6th 

 (or jth) where it passes out to enter v. innominata. Receives 

 posterior condyloi' da, imtscula'rcs, dorso-spina'les, menin'gio- 

 racktdza'nfr, ascen' dens and prof un' da cervica'les. i pr. valves 

 guard its mouth. 



NERVES. 



CRANIAL. Isi or Nsr'vus olfac'wUS. From corpus striatum, 

 middle and anterior lobes of cerebrum. Supplies the Schnei- 

 derian membrane. Special function, smelling. 



2cl or Qp'ticus. From optic thalami and the corpora genic- 

 ulata ct quadrigemina, out through optic foramen to retina. 

 Special function, sight. 



3d or Moto'rius Cc'uli. From crus cerebri and pons (?) out 

 through foramen lacerum anterius to all the muscles of the 

 orbit, save the superior oblique and external rectus; a few 

 filaments pass to the iris. Is a motor nerve. 



4. h cr Pathet'icu:. From valve of Vieussens, through fora- 

 men l.icerum anterius to superior oblique. Is a motor. 



5.h or Trigeni'iniS. The sensory, or posterior root, from the 

 lateral tract of the medulla, the pons, and cerebellum (middle 

 peduncle). The motor root from the pyramidal body. The 

 sensory supplies are to the eye-ball (iris, ciliary body, etc), 

 lachrymal gland, conjunctiva, Schneiderian membrane, all 

 the muscles and integument about the eye-ball, o:bit, cs fron- 

 talis, nose, mouth, cheek, lips, temple, superior portion of 

 pharynx, tongue, gums, and teeth. Motor filaments are 

 given to the external and internal pterygoid, temporal, bucci- 

 nator, and masseter muscles. Special sensation (taste) to 

 mucous membrane of mouth, gums, tongue (anterior and mid- 

 dle portion), sub-lingual gland, conical and fungiform papillae. 



