FIGURE 5. Anatomically separate left inferior prefrontal cortical regions make distinct functional contributions during encoding, which predict subsequent free recall.

In the pars opercularis (yellow), activity is greater during the encoding of individual items that are recalled compared to those that are not (Hits vs. Misses; see also Figure 3 and Table 1). In the caudal inferior prefrontal cortex (purple), activity during the encoding of all items of a list (All vs. Fixation) is greater for lists in which subsequent recall performance is better (more items are recalled; see also Fig. 4 and Table 2). For this illustration, suprathreshold functional clusters were rendered on the partially inflated pial surface of the canonical SPM/MNI standard template (colin27) using the Freesurfer tksurfer tool.