THE INFLUENCE OF RESPIRATORY MOVEMENTS ON THE CUTANEOUS CIRCULATION

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Abstract
The systolic blood‐pressure is maintained nearly constant in man during forced respiration by means of a compensatory cutaneous vaso‐constriction.Evidence is put forward that this compensatory factor is absent in artificially over‐ventilated chloralosed cats, and that its absence is not due to a fixation of the skin‐vessels.The main cause of the cutaneous vaso‐constriction during and after over‐ventilation in man is the cumulative effect of the active, forced respiratory movements. The absence of this factor accounts for the failure of artificially over‐ventilated chloralosed cats to compensate.Our thanks are due to Professor M'Dowall for much kind assistance.

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