Figure 1.
Basic hydraulic model of the relation between arterial pressure and cerebrospinal fluid pressure. A = cerebral artery; DS = dural venous sinus; CSF = cerebrospinal fluid; Pa = cortical artery blood pressure; Pcsf = cerebrospinal fluid pressure; Pds = dural sinus pressure; Psa= systemic arterial blood pressure Psv= subarachnoid venous pressure; Ra = inflow (arteriolar) resistance; Rv = outflow (venous) resistance; SA = systemic (precerebral) artery; SV = subarachnoid vein; a black arrow indicates the site of venous collapse; the white arrows indicate the direction of blood flow