SELECTIVE VASCULAR REACTION PATTERNS IN THE NASAL SEPTUM AND SKIN OF THE EXTREMITIES AND HEAD

Abstract
Evidence for selective vascular patterns in the skin and nasal septum is supplied by studies with the photoelectric plethysmograph previously described. The vascular responses to auditory and psychio stimuli, deep breaths, the cold pressor test, and to breath holding, and the character, distr. and timing of spontaneous waves support the concept of vasomotor patterns selective with respect to the topography, timing, direction and extent of the vasomotor activity in the vascular areas studied. The similarity in the direction and character of the vascular changes in skin of the forehead with those known to occur in the cerebral circulation suggests the possibility of using plethysmograms of the former as an indicator of the cerebral circulation.