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In page Chantal Stern:

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Stern published the earliest[citation needed] functional magnetic resonance imaging study showing robust increases in blood flow to the hippocampus during memory encoding.[1] Prior to this study, imaging studies did not observe robust changes in hippocampus during verbal memory tasks, but this study demonstrated clear increases in blood flow during encoding of complex novel visual scenes. This result was subsequently replicated in numerous studies demonstrating activity in the hippocampus and associated parahippocampal cortical regions during encoding of new information, including work showing that the magnitude of hippocampal activity during encoding of stimuli correlates with recognition of stimuli in subsequent memory tests.[2]