Accession Number : AD0695565

Title :   THE EFFECT OF REPEATED COLD EXPOSURE OF THE HAND ON THE REACTIVITY OF DIGITAL VESSELS,

Corporate Author : MANITOBA UNIV WINNIPEG DEPT OF PHYSIOLOGY

Personal Author(s) : Gaskell,Peter ; Long,Kathleen L.

Report Date : 27 JAN 1968

Pagination or Media Count : 6

Abstract : One hand of each of 10 subjects was immersed in stirred water at 4C for 1 h per day, 5 days per week, for 3 weeks, to produce local acclimatization to cold. The opposite hand was immersed at the same time in water at 32C. The reactivity of digital vessels in a finger of each hand was measured as the increase in the critical opening pressure of the vessels in response to an intravenous infusion of noradrenaline at 2 and 5 micrograms/min. The reactivity of digital vessels in the test hand was compared with that in the control hand both before and after the repeated cold exposure of the test hand to see whether the cold exposure altered the reactivity of vessels in the test hand relative to that in the control hand. No evidence of such a relative change was obtained. Resting blood flow at 21 and 32C in the test hand was compared with that in the control hand both before and after the repeated cold exposure. No change in the relative flow rate in the two hands was observed as a result of the cold exposure. Roentgen studies of the hands did not reveal any effect of the repeated cold exposure on the mineralization of the bones of the hands. (Author)

Descriptors :   (*BLOOD VESSELS, HANDS), (*HANDS, TEMPERATURE), MANITOBA, TOLERANCES(PHYSIOLOGY), BLOOD CIRCULATION, EXPOSURE(PHYSIOLOGY)

Subject Categories : Stress Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE