While iEEG affords high spectrotemporal resolution compared to fMRI, fMRI provides potentially greater anatomical precision with greater ease of sampling a large number of brain hubs, including the hippocampus, which we did not sample in the Watrous et al. study. The two studies therefore highlight complementary aspects of retrieval, the spectrotemporal and functional/anatomical substrates of memory retrieval. Importantly, our current findings thus provide several new important advances, implicating 1) the hippocampus as a hub in all aspects of spatiotemporal memory processing and retrieval 2) more comprehensive anatomical differences for spatial versus temporal retrieval, particularly anterior versus posterior differences, than previously observed 3) unique roles for the IFOr in incorrect versus correct retrieval and 4) greater levels of functional connectivity in individual participants as important to better memory performance.
