ISCHAEMIC AND POST-ISCHAEMIC PARAESTHESIAE: NORMAL RESPONSES IN THE UPPER LIMB WITH SPECIAL REFERENCE TO THE EFFECT OF AGE

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Abstract
A group of 93 subjects in 4 age classes from 12 to 84 years were given paraesthesiae tests following a 10-minute period of ischemia caused by above-elbow compression. A comparable group including subjects with anemia, hypertension or cold limbs, the presence of non-sensory abnormalities from manifest nervous disease, or who took a test not of the standard 10-minute type, or whose tests were incompletely evaluated was also examined. In the first group there was a tendency for paraesthesiae to occur in fewer subjects with advancing age. It was always present in the youngest age group (12-30 years) but only in 1/3 of the oldest group (61-84 years). Post ischemic paraesthesiae occurred with greater constancy. It was absent in all but 4 subjects of the oldest group. Essentially the same lessened frequency of ischemic paraesthesiae with advancing age was seen in the second group. Certain features of the results appear sufficiently constant to provide clinical criteria of normality provided age is taken into account.

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