Fig. 3

Stochastic aspects of the glymphatic circulation velocity fields (Models V1 and V2). a Probability density of the glymphatic circulation velocity magnitude \(\Vert v \Vert\) cf. (9). b Streamlines of a corresponding velocity field sample. c Velocity magnitude and streamlines for the directional velocity field \(v_{\mathrm{dir}}\) as given by (10). The flow field is assumed to follow cardiovascular pulses upwards along the brain stem. After entering the deeper parts of the brain, the bulk flow spreads out at reduced velocity magnitude. From left to right: sagittal, coronal and transverse view