. The anatomy of the domestic animals. Veterinary anatomy. 794 NERVOITS SYSTEM OF THE HORSE part of the thalamus, and (3) the anterior quach'ifjeniinal body (indirectly). The fibers which go to the medial geniculate body appear to belong to Cuulden's conmiissiu'e and to be non-\dsual in function. Tlie \'isual fibers, which come from the lateral part of the retina of the same side and tlie medial part of the retina of the opposite side, terminate aliout cells in the anterior quad- rigeminal body and the part of the thalamus which corresponds to the pulvinar and lateral genicu- late body of man.
. The anatomy of the domestic animals. Veterinary anatomy. 794 NERVOITS SYSTEM OF THE HORSE part of the thalamus, and (3) the anterior quach'ifjeniinal body (indirectly). The fibers which go to the medial geniculate body appear to belong to Cuulden's conmiissiu'e and to be non-\dsual in function. Tlie \'isual fibers, which come from the lateral part of the retina of the same side and tlie medial part of the retina of the opposite side, terminate aliout cells in the anterior quad- rigeminal body and the part of the thalamus which corresponds to the pulvinar and lateral genicu- late body of man. From the cells of the former fibers ]iass to the nuclei of the motor nerves of the eyeball, and complete tlie reflex arc. Fibers procei^d from the cells of the thalamus to the visual area of the cortex in the occipital i^art of the hemisphere. THE OCULOMOTOR NERVE The oculomotor nerve (N. oonlomotoritis) arises by several radicles from the basal surface of the cercljral peduncle, a little lateral to the interpetluncular furrow. It turns sharply outward and for- ward, crosses over the cavernous sinus, and continues above the maxillary iterve and in company with the ophthalmic nerve to the foramen orbitale. It emerges throtigh the foramen with the lat- ter nerve and the abducens and divides into two branches. The dorsal branch is short and divides into two twi<!;s which stipply the dorsalis and levator pal- ]3t'lirap stiperioris. The ventral branch (Figs. 563, 564) is larger and much longer. It supplies the motor fibers to the ciliary gan- glion (which lies directly on this braitch in the horse) and short branches to the rectus medialis and rectus ventralis, and con- tinues forward on the latter to end in the ventral oblique mus- cle. The deep origin of the fibers of the oculomotor nerve is in the oculo- motor nucleus, situated in the gray mat- ter of the floor of the cerebral aque- duct in the region of the anterior cor- pora ,viTv OF Horse. shown on
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectveterinaryanatomy
