Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/380
Appears in Collections:Psychology Journal Articles
Peer Review Status: Refereed
Title: Evidence accumulation and the moment of recognition: dissociating perceptual recognition processes using fMRI
Authors: Ploran, Elisabeth J
Nelson, Steven M
Velanova, Katerina
Donaldson, David
Petersen, Steve E
Wheeler, Mark E
Keywords: Perceptual recognition
Decision making
Cognition
fMRI
visual
Evidence accumulation
Issue Date: 31-Oct-2007
Publisher: Society for Neuroscience
Citation: Ploran EJ, Nelson SM, Velanova K, Donaldson D, Petersen SE & Wheeler ME (2007) Evidence accumulation and the moment of recognition: dissociating perceptual recognition processes using fMRI, Journal of Neuroscience, 27 (44), pp. 11912- 11924.
Abstract: Decision making can be conceptualized as the culmination of an integrative process in which evidence supporting different response options accumulates gradually over time. We used functional magnetic resonance imaging to investigate brain activity leading up to and during decisions about perceptual object identity. Pictures were revealed gradually and subjects signaled the time of recognition (TR) with a button press. We examined the time course of TR- dependent activity to determine how brain regions tracked the timing of recognition. In several occipital regions, activity increased primarily as stimulus information increased, suggesting a role in lower-level sensory processing. In inferior temporal, frontal, and parietal regions, a gradual buildup in activity peaking in correspondence with TR suggested that these regions participated in the accumulation of evidence supporting object identity. In medial frontal cortex, anterior insula/frontal operculum, and thalamus, activity remained near baseline until TR, suggesting a relation to the moment of recognition or the decision itself. The findings dissociate neural processes that function in concert during perceptual recognition decisions.
Type: Journal Article
URI: http://hdl.handle.net/1893/380
DOI Link: http://dx.doi.org/10.1523/​JNEUROSCI.3522-07.2007
Rights: Published in Journal of Neuroscience. Copyright: Society for Neuroscience.
Affiliation: University of Pittsburgh
Washington University In Saint Louis
University of Pittsburgh
Psychology
Washington University In Saint Louis
University of Pittsburgh

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