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The intensity of SSR abnormalities in AD. 0 = normal; 1 = increased latency in one limb; 2 = increased latency in the upper and lower limb or absence of the response from one limb;3 = increased latency in one limb or absence of the response from the other limb; 4 = absence of the response from the upper and lower limb. AD indicates Alzheimer’s disease; SSR, sympathetic skin response.
