Most theories of memory propose that perceptual mechanisms used to process the original event are ‘reactivated’ by top-down mechanisms in reconstructing the perceptual details of a remembered experience ( James, 1890 Ungerleider and Mishkin, 1982 Damasio, 1989 Kosslyn, 1994 Roland and Gulyás, 1994). Two broad classes of process are engaged during remembering to reinstate the perceptual details of the original experience - those associated with top-down strategic processes that are engaged during the search for the appropriate information and those associated directly with representing the reconstructed memory content ( Koriat, 2000 Rugg and Wilding, 2000 Buckner and Wheeler, 2001 Buckner, 2003). These findings indicate a role in integrating perceptual reactivation and search processes during remembering.Īttention, cueing, episodic memory, parieto-occipital, remembering, retrieval Introduction While dorsal regions in parietal and superior occipital cortex also appeared to show search-related activity as well as robust modality effects, they were also influenced by preparatory cues during the retrieval phase, and to a lesser degree during the cue phase. These findings suggest a specific role for IT regions in reconstruction of visual details during remembering. Regions in IT cortex appeared to show search-related activity during retrieval, as well as robust modality effects, but they were not influenced by preparatory cues. Results suggest a dissociation among inferior temporal (IT) and parieto-occipital (PO) processing regions in how they were influenced by preparatory cues prior to remembering, and indicate a dissociation in how they were influenced by the subsequent validity of those cues during remembering. In the present study we used a cueing paradigm based on event-related functional magnetic resonance imaging to separate activity in the initial preparation phases of retrieval from later phases during which retrieval search ensued, and detailed auditory and visual memories were reconstructed. Remembering involves the coordinated recruitment of strategic search processes and processes involved in reconstructing the content of the past experience.
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