Figure 1.

a, iEEG recording sites in hippocampus and two prefrontal cortex subdivisions investigated in this study. b, Event structure and timing of memory encoding and recall task phases. Participants were first presented with a list of words in the encoding block and asked to recall as many as possible from the original list after a short delay (for details, see Materials and Methods). HIPP: hippocampus, MFG: middle frontal gyrus and IFG: inferior frontal gyrus subdivisions of prefrontal cortex.