Figure 12.

To examine the estimation accuracy of numerical LFP solutions under differing mesh geometries (tetrahedral vs. hexahedral) and managing endogenous current sources via the current shifting regime, a range of models with varying resolution were generated, solved, and quantitatively compared with an analytical estimate via the line-source equation in a plane at 50 μm under the slice model. μ, σ in each window denote the average and standard deviation of residuals over all voxels and all time-steps. Hexahedral meshes achieved accuracies comparable to tetrahedral meshes at around 1/6th the number of elements. Also, hexahedral solutions at higher node counts achieved a smoother solution (visible in the bottom row and in σ's).