Diseases of the nervous system .. . FiG. 45.—Diagram of Fig. 44. (After Toldt.) Fig. 46.—Section through the An-terior Corpora Quadrigemina. M. obliquu? superior Ganglion ciliare —N. trochlearisSmall cell median nucleus (for the M. sphincter pupilla?) AquacHuctus cerebri (Sylvii) Colliculus superior of thecorpora quadrigemina —: M. sphincter pupillse~ M. ciliaris —t M. rectus lateralis For the external ocularmuscles For the internal ocular muscles(Radix brevis ganglii ciliaris) Tract of the pupillaryfibers of the N. opticus \ I^orpus geniculatumraediale Gyrus angu-Jaris (?) 7- Central tract fo
Diseases of the nervous system .. . FiG. 45.—Diagram of Fig. 44. (After Toldt.) Fig. 46.—Section through the An-terior Corpora Quadrigemina. M. obliquu? superior Ganglion ciliare —N. trochlearisSmall cell median nucleus (for the M. sphincter pupilla?) AquacHuctus cerebri (Sylvii) Colliculus superior of thecorpora quadrigemina —: M. sphincter pupillse~ M. ciliaris —t M. rectus lateralis For the external ocularmuscles For the internal ocular muscles(Radix brevis ganglii ciliaris) Tract of the pupillaryfibers of the N. opticus \ I^orpus geniculatumraediale Gyrus angu-Jaris (?) 7- Central tract forthe nerves ofthe ocular muscles Thalamus ?orpus genicuitum laterale Tractus opticus 11 i1=1. Rectus superiorRectus medialis Obliguus inferior Rectus inferior Nucleus n. trochlearisNucleus n. abducentis Fasciculus longitudinalis raedialis Fig. 47.—Tlie nuclear origin of the oculomotor and trochlear in the middle brain; their centraltract (blue) and their union with each other, as well as with the nucleus of the abducensthrough the median longitudinal bundle (red). The division of the nucleus of the oculo-motor in the lateral principal nucleus, the small-celled median nucleus, and the large-celledmedian nucleus; the localization of the different fiber groups of the oculomotor in thisnuclear area. The central course of the so-called pupillary fibers of the optic nerve (tractfor the reflex contraction of the pupil), (Diagram based on Bernheimers description.) 53 54 HISTOLOGY OF THE CENTRAL NERVOUS SYSTEM mined, the reader being referred to the works of Edinger, Westphal, Pick andStarr. The united fibers (among these a few crossed ones also) pass trans-versely through the tegmen
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