Dynamics of the Hippocampus During Encoding and Retrieval of Face-Name Pairs

0301 basic medicine Brain Mapping Recognition, Psychology Hippocampus Magnetic Resonance Imaging Functional Laterality 03 medical and health sciences Memory Face Dentate Gyrus Mental Recall Humans Learning Names
DOI: 10.1126/science.1077775 Publication Date: 2003-01-23T21:24:16Z
ABSTRACT
The medial temporal lobe (MTL) is critical in forming new memories, but how subregions within the MTL carry out encoding and retrieval processes in humans is unknown. Using new high-resolution functional magnetic resonance imaging (fMRI) acquisition and analysis methods, we identified mnemonic properties of different subregions within the hippocampal circuitry as human subjects learned to associate names with faces. The cornu ammonis (CA) fields 2 and 3 and the dentate gyrus were active relative to baseline only during encoding, and this activity decreased as associations were learned. Activity in the subiculum showed the same temporal decline, but primarily during retrieval. Our results demonstrate that subdivisions within the hippocampus make distinct contributions to new memory formation.
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