A within-subject ERP and fMRI investigation of orientation-specific recognition memory for pictures

• Published in: Cognitive neuroscience Vol. 3; no. 3-4; pp. 174 - 192
• Main Authors: Herzmann, Grit, Jin, Mingwu, Cordes, Dietmar, Curran, Tim
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis 01.09.2012; Taylor & Francis Ltd
• Subjects: Brain; Brain mapping; Cortex (parietal); ERP/fMRI; Event-related potentials; Familiarity; Functional magnetic resonance imaging; Investigations; Orientation behavior; Picture orientation; Prefrontal cortex; Recognition memory; Temporal lobe; Visual cortex
• ISSN: 1758-8928; 1758-8936; 1758-8936
• DOI: 10.1080/17588928.2012.669364

Despite a large body of research on recognition memory, its temporal substrate, measured with ERPs, and spatial substrate, measured with fMRI, have never been investigated in the same subjects. In the present study, we obtained this information in parallel sessions, in which subjects studied and recognized images of visual objects and their orientation. The results showed that ERP-familiarity processes between 240 and 440 ms temporally preceded recollection processes and were structurally associated with prefrontal brain regions. Recollection processes were most prominent from 440 to 600 ms and correlated with activation in temporal, parietal, and occipital brain regions. Post-retrieval monitoring, which occurred in the ERP between 600 and 1000 ms as a long-lasting slow wave over frontal channel groups, showed correlations with activation in the prefrontal and parietal cortex. These ERP/fMRI relationships showed some correspondences to source localizations of the investigated ERP memory effects.