Geriatrics : the diseases of old age and their treatment, including physiological old age, home and institutional care, and medico-legal relations . ir the loss of elasticity in the arteries causedby activity, and sees therein a general fault in the organism tomake good the losses occasioned by activity. The virgin uterusat the menopause and the brain of the idiot in old age dispose ofthat part of his theory. He also says that the local loss of heatfrom the surface causes general loss of heat. In maturity thisloss is replaced through muscular activity, and this in turn createsthe necessity for
Geriatrics : the diseases of old age and their treatment, including physiological old age, home and institutional care, and medico-legal relations . ir the loss of elasticity in the arteries causedby activity, and sees therein a general fault in the organism tomake good the losses occasioned by activity. The virgin uterusat the menopause and the brain of the idiot in old age dispose ofthat part of his theory. He also says that the local loss of heatfrom the surface causes general loss of heat. In maturity thisloss is replaced through muscular activity, and this in turn createsthe necessity for food to replace the waste of muscle. Insenility the heat regulation is weakened and the loss of local heatdoes not arouse the same necessity for muscular activity nor isthere the same desire for food. Lessened food produces lessenednutrition to repair waste and less fuel for combustion. Theobjection to this theory is that lessened muscular activity is dueto the anatomical changes in muscles and joints making motionmore difficult, and that the desire for food, though stimulated bymuscular activity, exists without the necessity for such stimu-. Colonic Pouch. (From Tyson and Fussells Practice of Medicine.) Pho-tograph of colonic dilatation in a young man. Used here to illustrate the senilecolonic pouch, which it resembles. CAUSES OF AGEING 43 lation as is seen in the paralyzed person, while forced feeding inold age does not increase the repair of waste. The slightly-lower temperature found in the aged can be accounted for bythe lessened muscular activity and also by lessened metabolism.(The senile individual requires only from 75 to 80 per cent, ofthe calories required in maturity.) The diminished surfacetemperature is due to impaired surface circulation and changesand not to weakened heat regulation. There are several theoriesbased upon cell changes. Ever since Schwann presented hisfamous cell theory, investigators have sought in the cell thesolution of the problems of life, of
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Keywords: ., bookcentury1900, bookdecade1910, bookidger, booksubjectgeriatrics
