The anatomy of the nervous system, from the standpoint of development and function . ngs to the exteroceptive portion ofthe somatic ajferent division of the nervous system. 1 Kohnstamm and Hindelang (1910) and von Monakow (1°13) have described a secondaryvisceral afferent path which arises from the gray matter in and around the tractus solitarius andterminates in the thalamus. THE CRANIAL NERVES AND Till Ik \i I u i l83 Secondary Afferent Paths.—From the cells of the mail] sensor) and spinalnuclei of the trigeminal nerve arise fibers which enter the reticular formationand are there grouped int
The anatomy of the nervous system, from the standpoint of development and function . ngs to the exteroceptive portion ofthe somatic ajferent division of the nervous system. 1 Kohnstamm and Hindelang (1910) and von Monakow (1°13) have described a secondaryvisceral afferent path which arises from the gray matter in and around the tractus solitarius andterminates in the thalamus. THE CRANIAL NERVES AND Till Ik \i I u i l83 Secondary Afferent Paths.—From the cells of the mail] sensor) and spinalnuclei of the trigeminal nerve arise fibers which enter the reticular formationand are there grouped into Longitudinal bundles from which collaterals are given off to the motor nuclei of the brain stem ( Fig. 131 ). There are at least two su< lilongitudinal bundles in each lateral half of the brain. The ventral secondaryafferent path of the trigeminal nerve consists for the most part of crossed liber-and is located in the ventral part of the reticular formation, close to the spinothalamic tract in the medulla, and dorsal to the medial lemniscus in the pons Mesencephalon Pons-. Ventral cochlear nucleus Medulla oblongata -**j Cerebral aqueduct - - Inferior eollirulus Mesencephalic nucleus of N. V Sensory nucleus of N. V-/^Fourth ventricle ?-?Vestibular nucleus Dorsal cochlear nucleus Nucleus of tractus solitarius Nucleus of spinal trad X. V Central canal Fig. 130.—Sensory nuclei projected upon a median sagittal section of the human brain lines, general somatic sensory nuclei; cross-hatching, visceral sensory nucleus; stipple,special somatic sensory nuclei. and mesencephalon (Fig. 132). It is composed in large part of long fibers whichreach the thalamus. The dorsal secondary afferent path of the trigeminal nerveconsists chiefly of uncrossed fibers and lies not far from the floor of the fourthventricle and the central gray matter of the cerebral aqueduct. It consist- inconsiderable part of short fibers (Cajal, 1911; Wallenberg, 1905; Economo,1911; Dejerine, 19
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectnervoussystem, bookye
