. Diseases of the nervous system . In contrast to the veryprolonged sensory nucleus its origin is somewhat circumscribed, lying ver-tically above the place where the nerve emerges from the pontal fibers. Wefind its nucleus not far below the anterior third of the rhomboid fossa at itslateral border in the region of the locus cceruleus. Naturally the locus coeru-leus must be divided, i. a part of the sensory trigeminal nucleus whichhas been stained by pigment, and which during its prolonged course lies lat-erally in the rhomboid fossa, is situated just below the surface. The fiberspass from
. Diseases of the nervous system . In contrast to the veryprolonged sensory nucleus its origin is somewhat circumscribed, lying ver-tically above the place where the nerve emerges from the pontal fibers. Wefind its nucleus not far below the anterior third of the rhomboid fossa at itslateral border in the region of the locus cceruleus. Naturally the locus coeru-leus must be divided, i. a part of the sensory trigeminal nucleus whichhas been stained by pigment, and which during its prolonged course lies lat-erally in the rhomboid fossa, is situated just below the surface. The fiberspass from the motor nucleus without crossing and almost horizontally (a Nucl. n. IllNucl. n. IVRad. n. IV s Nucl. rad. desc. n. V ^Nucl. mot. n. VNucl. sens. n. VvPars sec. rad. n. VII _Nucl. n. int. n. VII —Nucl. n. VI-Nucl. n. VIIIPars prim. rad. n. VIINucl. n. VII Nucl. sens. n. IX Nucl. sens. n. X - Nucl. n. XII SNucl. mot. n. IX et X Nucl. n. XI Tract, Nucl. tr. solit. Rad. asc. n. V / „ Aquicd. Sylvi uci. ruber. n. IllFascic. longitud. Brach. pontie. Port, major n. VPort, minor n. V--^g,-^ Gangl. Gasseri V>Ram. n. trigm. I, II, III ..Rad. n. VII ,„.- N. interm. Gangl. spirale et rad. n. VIII—Gangl. vestibul. et rad. n. VIIIRad. n. VIangl. petros. et rad. n. XI Gangl. jugul. et Rad. sens. n. X mot. n. XXII Rad. post. n. spin. *Fig. -43.—Nuclear Origix of the Cerebral Nerves. (After Edinger.) little outwardly) through the pontal fibers at the point where these run tothe cerebellum as its superior peduncles. Its nerve fibers are situated withinthis longitudinal fiber layer through which they pass to those of the sensorytrigeminal roots; thus we see at the base of the brain between the pons andsuperior peduncles a common root emerging from the cerebellum. 56 HISTOLOGY OF THE CENTRAL NERVOUS SYSTEM Close to the motor origin of the fifth nerve, and upon about the sameplane, but extending rather caudally than ventrally, is the lengthy origin ofthe facial n
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