Extended Data Fig. 10: Exchange flow rates vary with brain permeability.
From: Brain motion is driven by mechanical coupling with the abdomen
a. Exchange flow rates across the spinal cord \({\Gamma }_{{\rm{SC}}}\) for different values of brain permeability. b. Exchange flow rates across the brain interface \({\Gamma }_{{\rm{BR}}}\) for different values of brain permeability. Except for the values of the brain permeability, all other conditions used in this simulation are identical to those used in the simulation reported in Fig. 6. In fact, the values reported here include the results presented in Fig. 6e to facilitate comparison. As a reminder, these results pertain to a simulation of the flow induced by a \(2\,{\rm{s}}\) pressure pulse \({p}_{0}=20\,{\rm{mmHg}}\) applied over \({\Gamma }_{{\rm{SZ}}}\). The nonlinear character of the model and the dependence of the volume fractions of the system’s constituents on the deformation contribute to the fact that the exchange flow rates are not directly proportional to the value of the permeability.
