Geriatrics : the diseases of old age and their treatment, including physiological old age, home and institutional care, and medico-legal relations . Pseudo-pagets Disease. Xouvelle Iconographie de la Salpetriere,, 1905. SENILE DEGENERATION OF THE BRAIN 139 culty shows diminished power even before the completion ofdevelopment. Etiology.—The diminution in the weight of the brain beginsnormally about the end of the fourth decade of life, soon afterit has reached its greatest weight and years before the atrophycould reasonably be charged to diminished nutrition fromcerebral arterioscleros
Geriatrics : the diseases of old age and their treatment, including physiological old age, home and institutional care, and medico-legal relations . Pseudo-pagets Disease. Xouvelle Iconographie de la Salpetriere,, 1905. SENILE DEGENERATION OF THE BRAIN 139 culty shows diminished power even before the completion ofdevelopment. Etiology.—The diminution in the weight of the brain beginsnormally about the end of the fourth decade of life, soon afterit has reached its greatest weight and years before the atrophycould reasonably be charged to diminished nutrition fromcerebral arteriosclerosis. The causes that prevail in old age,such as impaired nutrition and neurophages, do not prevailwhen the atrophic changes begin and no theory has been ad-vanced to explain it. As most of the psychic and somaticfunctions increase for a time after the brain begins to atrophy,it is reasonable to assume that the waste begins in those cellscontrolling the functions that are lessened about this what portion of the brain these cells are located is unknown. We find that organs and tissues which have been insufficientlyemployed and those wh
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