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Neural sources involved in auditory target detection and novelty processing: An event-related fMRI study

Published online by Cambridge University Press:  18 January 2001

KENT A. KIEHL
Affiliation:
Departments of Psychology and Psychiatry, University of British Columbia, Vancouver, B.C., Canada
KRISTIN R. LAURENS
Affiliation:
Departments of Psychology and Psychiatry, University of British Columbia, Vancouver, B.C., Canada
TIMOTHY L. DUTY
Affiliation:
Department of Physics, University of British Columbia, Vancouver, B.C., Canada
BRUCE B. FORSTER
Affiliation:
Department of Radiology, University of British Columbia, Vancouver, B.C., Canada
PETER F. LIDDLE
Affiliation:
Departments of Psychology and Psychiatry, University of British Columbia, Vancouver, B.C., Canada
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Abstract

We used event-related functional magnetic resonance imaging (erfMRI) techniques to examine the cerebral sites involved with target detection and novelty processing of auditory stimuli. Consistent with the results from a recent erfMRI study in the visual modality, target processing was associated with activation bilaterally in the anterior superior temporal gyrus, inferior and middle frontal gyrus, inferior and superior parietal lobules, anterior and posterior cingulate, thalamus, caudate, and the amygdala/hippocampal complex. Analyses of the novel stimuli revealed activation bilaterally in the inferior frontal gyrus, insula, inferior parietal lobule, and in the inferior, middle, and superior temporal gyri. These data suggest that the scalp recorded event-related potentials (e.g., N2 and P3) elicited during similar tasks reflect an ensemble of neural generators located in spatially remote cortical areas.

Type
Research Article
Copyright
2001 Society for Psychophysiological Research

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