Fig. 1

Statistical maps using standardized low-resolution brain electromagnetic tomography (sLORETA) of the delta frequency band during valproic acid treatment were projected onto a three-dimensional fiducial brain cortex. Non-parametric statistical analysis was performed to compare the current density distributions between the untreated and treated conditions. The colored areas represent the spatial extent of the voxels with a significant difference in current density. Log-F-ratio statistics were employed, and the color scale represents log-F-ratio values (threshold log-F-ratio = ±1.414, p < 0.05; threshold log-F-ratio= ±1.465, p < 0.01). A indicates anterior; P posterior, S superior, I inferior, L left, R right