Figure 2.

Cerebrovascular cross-sectional area reactivity (%CSA/mmHg of PetCO₂) to hypocapnia and hypercapnia across nine arteries. LPCA and RPCA: left and right posterior cerebral artery; LMCA and RMCA: left and right middle cerebral artery; LICA and RICA: left and right internal carotid artery; LACA and RACA: left and right anterior cerebral artery (n = 8 participants). Data presented as mean ± S.E.M. There was a difference between hypercapnia CVR and hypocapnia CVR at each vessel; paired t-test (P < 0.05).