Perceptual difficulty in source memory encoding and retrieval: prefrontal versus parietal electrical brain activity.

Neuropsychologia
Trudy Y Kuo, Cyma Van Petten

Abstract

It is well established that source memory retrieval--remembering relationships between a core item and some additional attribute of an event--engages prefrontal cortex (PFC) more than simple item memory. In event-related potentials (ERPs), this is manifest in a late-onset difference over PFC between studied items which mandate retrieval of a second attribute, and unstudied items which can be immediately rejected. Although some sorts of attribute conjunctions are easier to remember than others, the role of source retrieval difficulty on prefrontal activity has received little attention. We examined memory for conjunctions of object shape and color when color was an integral part of the depicted object, and when monochrome objects were surrounded by colored frames. Source accuracy was reliably worse when shape and color were spatially separated, but prefrontal activity did not vary across the object-color and frame-color conditions. The insensitivity of prefrontal ERPs to this perceptual manipulation of difficulty stands in contrast to their sensitivity to encoding task: deliberate voluntary effort to integrate objects and colors during encoding reduced prefrontal activity during retrieval, but perceptual organization of stimuli ...Continue Reading

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Citations

Nov 5, 2008·Neuroreport·Taylor M Joerger, Jennifer A Mangels
Jan 10, 2012·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Dianne E Thornhill, Cyma Van Petten
Jul 19, 2011·Neuropsychologia·Timm RosburgMikael Johansson
Oct 16, 2010·Psychophysiology·Jonathan R Folstein, Cyma van Petten
Feb 12, 2011·Experimental Psychology·Julia Schütz, Arndt Bröder
Jun 25, 2013·Consciousness and Cognition·C Dennis Boywitt, Thorsten Meiser
Oct 25, 2011·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Cyma Van Petten, Barbara J Luka
Jun 16, 2009·Neuropsychologia·Damian Cruse, Edward L Wilding
Aug 30, 2017·Memory & Cognition·Alison Robey, Tracy Riggins
Nov 27, 2020·Psychophysiology·Katie HoemannKaren S Quigley

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