Fig. 3From: An assessment of hypercapnia-induced elevations in regional cerebral perfusion during combined orthostatic and heat stressesReductions in relative changes of vertebral artery (VA, top) and internal carotid artery (ICA, bottom) blood flow to LBNP stress with (open) or without (solid) the hypercapnic gas. Both ICA and VA blood flows were decreased below normothermic baseline at the end of LBNPBack to article page