Diseases of the nervous system .. . Ftg. 112.—Friedreichs Disease. (After P. Marie.)9 111 112 HISTOLOGY OF THE CENTRAL NERVOUS SYSTEM there are a few large ones whose dendrites pass upward into the molecular layer,but the nerve processes within the granular layer after running a short dis-tance split up around many cells. Neuron fibers from the medullary massof the cerebellum, whose origin is not yet known, end in the granular are chiefly indebted for our knowledge of the finer structure of the cortexof the brain to the investigations of Ramon and van Gehuchten, and thisknowledge has
Diseases of the nervous system .. . Ftg. 112.—Friedreichs Disease. (After P. Marie.)9 111 112 HISTOLOGY OF THE CENTRAL NERVOUS SYSTEM there are a few large ones whose dendrites pass upward into the molecular layer,but the nerve processes within the granular layer after running a short dis-tance split up around many cells. Neuron fibers from the medullary massof the cerebellum, whose origin is not yet known, end in the granular are chiefly indebted for our knowledge of the finer structure of the cortexof the brain to the investigations of Ramon and van Gehuchten, and thisknowledge has been acquired by the Golgi method. F. NEURON DISEASES OF THE CEREBELLUM. FRIEDREICHS ATAXIA We know as jet of no diseases in which the tracts which lead to the cere-bellum or originate from it are alone affected. Such pure neuron diseasesof the cerebellum cannot arise independently, because the cerebellar tractsare most intimately connected both anatomically and functionally withother spinal and cerebral fiber systems, and in pat
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