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J Neurophysiol 97: 2075-2082, 2007. First published December 20, 2006; doi:10.1152/jn.01083.2006
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Heschl's Gyrus, Posterior Superior Temporal Gyrus, and Mid-Ventrolateral Prefrontal Cortex Have Different Roles in the Detection of Acoustic Changes

Marc Schönwiesner1,2,5, Nikolai Novitski1,2, Satu Pakarinen1,2, Synnöve Carlson2,3,4, Mari Tervaniemi1,2 and Risto Näätänen1,2

1Cognitive Brain Research Unit, Department of Psychology, 2Helsinki Brain Research Centre, and 3Neuroscience Unit, Institute of Biomedicine/Physiology, University of Helsinki, Helsinki, Finland; and 4Medical School, University of Tampere, Tampere, Finland; and 5Advanced Magnetic Imaging Centre, Helsinki University of Technology, Finland

Submitted 10 October 2006; accepted in final form 20 December 2006

A part of the auditory system automatically detects changes in the acoustic environment. This preattentional process has been studied extensively, yet its cerebral origins have not been determined with sufficient accuracy to allow comparison to established anatomical and functional parcellations. Here we used event-related functional MRI and EEG in a parametric experimental design to determine the cortical areas in individual brains that participate in the detection of acoustic changes. Our results suggest that automatic change processing consists of at least three stages: initial detection in the primary auditory cortex, detailed analysis in the posterior superior temporal gyrus and planum temporale, and judgment of sufficient novelty for the allocation of attentional resources in the mid-ventrolateral prefrontal cortex.


Address for reprint requests and other correspondence: M. Schönwiesner, Dept. of Neurology and Neurosurgery, Montreal Neurological Inst., McGill Univ., 3801 rue University, Montreal, Quebec H3A 2B4, Canada (E-mail: marc.schoenwiesner{at}mcgill.ca)




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