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. 2015 Sep 14;309(9):H1598–H1607. doi: 10.1152/ajpheart.00525.2015

Fig. 1.

Fig. 1.

Cerebral and extracerebral hemodynamics and O2 parameters during prolonged exercise. Values are means ± SE for 10 participants. Cerebral hemodynamics were obtained in both the dehydration and control exercise trials (A–D) but not for O2/CO2 parameters (E–H). A: internal carotid artery (ICA) blood flow. B: external carotid artery (ECA) blood flow. C: common carotid artery (CCA) blood flow. D: middle cerebral artery (MCA) mean blood velocity (Vmean). E: venous to arterial (v-a) CO2 difference. F: arterial to venous (a-v) O2 difference. G: brain CO2 output (V̇co2) index. H: cerebral metabolic rate of O2 (CMRO2). *P < 0.05 vs. rest; †P < 0.05 vs. the 30-min value.