Summary of encoding effects across all medial temporal lobe subregions. A) Anterior and posterior MTL regions of interest (ROIs) for a representative individual subject, displayed on coronal T2 slices (left hemisphere). Untraced slices are shown for comparison. In the anterior slice, amygdala subregions include the basolateral (orange), basomedial (yellow), centromedial (pink), and amygdaloid cortical (cyan) subregions. The combined left amygdala ROI is outlined in white. Other anterior regions include the anterior hippocampus (green), perirhinal cortex (PRC; red), and entorhinal cortex (pink). In the posterior slice, hippocampal subregions include the CA1 (yellow), combined CA2/CA3/DG (green), and subiculum (cyan) subregions. The combined left hippocampal ROI is outlined in white. The posterior slice also shows the parahippocampal cortex (PHC; blue). B, C) The effects of emotion (B) or context encoding (C) on recollection-related encoding activity are summarized for each of the aforementioned subregions. Regions are shaded according to the effect size (generalized eta squared, η2G) of the corresponding main effect for that region, such that more intense colors represent a larger effect and white represents effect sizes close to zero.