Diseases of the nervous system : a text-book of neurology and psychiatry . function of these olivocerebellar paths is still in question. Asto definite localization for other receptor paths (chemical, etc.) exactknowledge is absolutely wanting at the present time. So far as localization of motor functions in the nuclei is concerned,this seems to have received definite confirmation by the work ofHorsley {loc. cit.). Cerebellar tumors are relatively frequent. Almost one-third ofthe brain tumors occurring in childhood and adolescence are of cere-bellar origin. In order of frequency one finds gliom


Diseases of the nervous system : a text-book of neurology and psychiatry . function of these olivocerebellar paths is still in question. Asto definite localization for other receptor paths (chemical, etc.) exactknowledge is absolutely wanting at the present time. So far as localization of motor functions in the nuclei is concerned,this seems to have received definite confirmation by the work ofHorsley {loc. cit.). Cerebellar tumors are relatively frequent. Almost one-third ofthe brain tumors occurring in childhood and adolescence are of cere-bellar origin. In order of frequency one finds glioma, tubercle, sarcoma,and fibroma. The chief general symptoms of cerebellar tumors are headache, 1 Williamson, Review of Neurology and Psychiatry, March, 1910, for literature, 2 Stewart and Holmes, Brain, 1904, xxvii, 522. 3 See Van Rynberk, Ergebnisse d. Physiol., 1907. 4 Brain, 1908. sjbid., 1909. e Ibid., 1908. TUMORS OF CEREBELLUM 417 usually severe, occipital or frontal, and apt to be confined to asagittal plane; papilledema and later optic atrophy, which is rapidly. Fig. 219


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