Using a room kept at a constant temperature, vasomotor tone was evaluated in a series of elderly subjects. Although partial defects in vasoconstriction were found in some, 78% had normal reactions to body cooling and heating. None had orthostatic hypotension. Vasomotor reflexes tend to be well maintained with aging.
Gorgy AN, David SB, Friedman SA. Vasomotor Tone in the Aged. Arch Neurol. 1973;29(6):439–440. doi:10.1001/archneur.1973.00490300101016
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