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Appears in Collections:Psychology Journal Articles
Peer Review Status: Refereed
Title: Evidence accumulation and the moment of recognition: dissociating perceptual recognition processes using fMRI
Author(s): Ploran, Elisabeth J
Nelson, Steven M
Velanova, Katerina
Donaldson, David
Petersen, Steve E
Wheeler, Mark E
Keywords: Perceptual recognition
Decision making
Evidence accumulation
Brain Magnetic resonance imaging
Visual perception Psychological aspects
Decision making Psychological aspects
Recognition (Psychology)
Issue Date: 31-Oct-2007
Date Deposited: 4-Jun-2008
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.
DOI Link: 10.1523/JNEUROSCI.3522-07.2007
Rights: Published in Journal of Neuroscience. Copyright: Society for Neuroscience.

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