. Diseases of the nervous system . tothe sinuses of the fourth ventricle and into open spaces the largest of whichis the foramen of Magendie, permits communication with the arachnoid space;this is of importance in equalizing variations of pressure. The manifoldcommunications of the cerebellum with most of the other structures of thecentral nervous system by means of the brachium conjunctivum cannot herebe mentioned; they have become known only by minute comparative anatom- MACROSCOPIC ANATOMY OF THE CENTRAL NERVOUS SYSTEM 23 ical investigations in degeneration. It is certain that the cerebellu
. Diseases of the nervous system . tothe sinuses of the fourth ventricle and into open spaces the largest of whichis the foramen of Magendie, permits communication with the arachnoid space;this is of importance in equalizing variations of pressure. The manifoldcommunications of the cerebellum with most of the other structures of thecentral nervous system by means of the brachium conjunctivum cannot herebe mentioned; they have become known only by minute comparative anatom- MACROSCOPIC ANATOMY OF THE CENTRAL NERVOUS SYSTEM 23 ical investigations in degeneration. It is certain that the cerebellum is indi-rectly connected with the cortex of the cerebrum by the pontal arms, to thebrachium conjunctivum by the red nucleus and thalamus opticus, and thusindirectly with the cerebrum, while the corpus restiformia communicates withthe cerebrum from the spinal cord and medulla. The cerebellum has recently acquired a special importance because, owingto tumors and suppurations in this region or in its immediate vicinity, it has \Vma. Pos Fig. 16.—Combined Sagittal Section through the Stem of the Brain-, Twice Enlarged. (After Obersteiner.) Brcj, Brachium conjunctivum; Cm, corpus niammillare; Cop, posterior commissure; DLm,Lemniscus decussation; DPy, pyramidal decussation: F)ig, funiculus gracilis; Jf, infun-dibulum; Lm, lemniscus; Na, anterior nucleus of the thalamus; Xg, nucleus gracilis; No,olivary nucleus; Ntg, red nucleus; Oaa and Oac, ventral and dorsal secondary olive; Po,pons; Pp, pes pedunculi; Py, pyramid; Qa and Qp, anterior and posterior corpora quad-rigemina; SnS, substantia nigra; Tho, thalamus opticus; Yg, anterior column groundbundle; Vma, velum medullare anterins. been laid bare, and has been operated upon. Experimental and pathologicobservations have conclusively shown that the cerebellum serves to maintainequilibrium, for which it is especially designed by its connection with thevaried sensory and motor apparatus of the central nervous system. Disturb-ances ar
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectnervoussystem, bookye
