1. Theta phase synchronization between the hippocampus and the prefrontal cortex during decision making in the postlearning phase.
Theta phase synchronization between the hippocampus and the prefrontal cortex during decision making in the postlearning phase. A, Phase locking index, PLI, of the theta rhythm to the medial temporal lobe theta rhythm was higher in the active choice conditions when compared to the forced choice condition in the lateral superior frontal gyrus (p < 0.05, whole brain FWE). PLI was calculated within a time window spanning 200 to 2000 ms after the start of the decision period. B, Time course of PLI for the active and forced choice conditions for the peak voxel identified in A. For this analysis, the original time window was divided into three 600 ms time windows. C, PLI of the theta rhythm to the medial temporal lobe theta rhythm was higher in the active choice conditions when compared to the forced choice condition in the dorsal anterior cingulate cortex (p < 0.05, whole brain FWE). PLI was calculated within a time window spanning 200 to 2000 ms after the start of the decision period. D, Time course of PLI for the active and forced choice conditions for the peak voxel identified in C. For this analysis, the original time window was divided into three 600 ms time windows. E, PLI of the theta rhythm to the medial temporal lobe theta rhythm was higher in the active choice conditions when compared to the forced choice condition in the medial frontopolar cortex (p < 0.05, whole brain FWE). PLI was calculated within a time window spanning 200 to 2000 ms after the start of the decision period. F, Time course of PLI for the active and forced choice conditions for the peak voxel identified in E. For this analysis, the original time window was divided in three 600 ms time windows.
Marc Guitart-Masip et al. J. Neurosci. 2013;33:
©2013 by Society for Neuroscience