OCULOMOTOR NERVE. 



68l 



of accommodation. The fibers mentioned under 2 and 3 are given off 

 from the branch for the inferior oblique muscle as the short root of the 

 ciliary ganglion (Fig. 343, 3) and pass from the latter through the short 

 ciliary nerves into the bulb. v. Trauwetter, Adamuk, Hensen, and 

 Volckers observed on irritation of the nerve that the eye underwent 

 change as in near vision, and the pupil diminished in size. Details as to 

 the origin of the individual portions of the nerve are given on p. 833 



Pulvinar. 



Corpus f anticum. 



quadri-K 



gemina. (.posticum. 



Locus coeruleus. 



Eminentia teres. 



Crus cerebelli 

 ad pontem. 



Conarium or pineal gland. 

 Brachium conjunctivum 

 anticum. 



Brachium conjuncti- 

 vum posticum. 



Corpus geniculatum 

 mediale. 



Pedunculus cerebri. 



ad corpora 

 quadri- 

 gemina. 



ad medul- 

 lam ob- 

 longatam. 



Crura 

 cere- 

 belli. 



Ala cinerea. 

 Accessorius nucleus. 



Funiculus cuneatus. 



Funiculus gracilis 



FIG. 241. Medulla Oblongata and Quadrigeminate Bodies, Magnified: The figures from IV to XII indicate 

 the superficial origin of the cerebral nerves; the figures from 3 to 12 indicate the position of their nuclei of 

 origin; t, funiculus teres. 



The center for reflex stimulation of the fibers of the pupillary sphinc- 

 ter by light is situated in the quadrigeminate bodies near the aqueduct 

 of Sylvius. A detailed description is given on p. 842. The contraction of 

 the pupil that occurs in conjunction with the act of accommodation is 

 to be looked upon as an associated movement. 



In man, the nerve anastomoses at the cavernous sinus with the first branch 

 of the trigeminus, in this way receiving muscle-sense fibers; further with the 



