Figure 3. Cerebral venous outflow distribution during Valsalva manoeuvre in supine and standing position.

Model simulation of cerebral outflow distribution and measurements of cerebral blood flow velocity (CBFV) and central venous pressure (CVP) in a subject who participated in the study of Pott et al. (2000). M-Int Jug Flow, flow into the internal jugular veins; M-Ven Plex Flow, vertebral venous plexus flow; M-Int Jug Vol, volume of each internal jugular vein.