Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A and B: continuous recordings of middle cerebral artery (MCA) mean blood velocity (Vmean) and V̇e during hypercapnia at rest and during exercise in 1 representative subject. Hypercapnia was started at time 0. C and D: group-averaged t0 and τ of MCA Vmean and V̇e exponential fitting curves at rest and during exercise. Values are means ± SE. *P < 0.05 vs. MCA Vmean. †P < 0.05 vs. rest.
