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High-resolution ERP mapping of cortical activation related to implicit object-location memory
Murphy, Johathan S.; Wynne, Ciara; O'Rourke, Edel M.; Commins, Sean; Roche, Richard
High-density event-related potentials (ERPs) were recorded during an object recognition task which involved task-irrelevant changes in the location of studied objects. Participants categorised objects as studied or novel while data were analysed to ascertain the effect of the location changes on performance and waveform topography. Our results indicate that humans can classify objects faster and more accurately when using implicit spatial memory. Individual differences observed in object recognition proficiency were absent if objects were presented in their ‘correct’ location. In a second experiment we replicated the behavioural findings while manipulating viewpoint to discount scene recognition as an underlying factor. We propose a model which includes activation of the right medial temporal lobe prior to P300 elicitation to account for the prophylactic effect of implicit processing on object recognition. Hemispheric differences in parietal componentry dependant on sex of participant were also observed and are discussed in relation to differential strategies.
Keyword(s): Implicit memory; Spatial ability; ERP; P300; Gender
Publication Date:
2009
Type: Journal article
Peer-Reviewed: Yes
Institution: Maynooth University
Citation(s): Murphy, Johathan S. and Wynne, Ciara and O'Rourke, Edel M. and Commins, Sean and Roche, Richard (2009) High-resolution ERP mapping of cortical activation related to implicit object-location memory. Biological Psychology, 82 (3). pp. 234-245. ISSN 0301-0511
Publisher(s): Elsevier
File Format(s): other
Related Link(s): http://mural.maynoothuniversity.ie/10695/1/RR-High-resolution-2009.pdf
First Indexed: 2020-04-02 06:13:39 Last Updated: 2020-04-02 06:13:39