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Scientific article
English

Pre-stimulus beta oscillations within left posterior sylvian regions impact auditory temporal order judgment accuracy

Published inInternational journal of psychophysiology, vol. 79, no. 2, p. 244-248
Publication date2011
Abstract

Both neural and behavioral responses to stimuli are influenced by the state of the brain immediately preceding their presentation, notably by pre-stimulus oscillatory activity. Using frequency analysis of high-density electroencephalogram coupled with source estimations, the present study investigated the role of pre-stimulus oscillatory activity in auditory spatial temporal order judgments (TOJ). Oscillations within the beta range (i.e. 18-23 Hz) were significantly stronger before accurate than inaccurate TOJ trials. Distributed source estimations identified bilateral posterior sylvian regions as the principal contributors to pre-stimulus beta oscillations. Activity within the left posterior sylvian region was significantly stronger before accurate than inaccurate TOJ trials. We discuss our results in terms of a modulation of sensory gating mechanisms mediated by beta activity.

Keywords
  • Acoustic Stimulation/methods
  • Adult
  • Beta Rhythm/physiology
  • Brain Mapping
  • Cerebral Cortex/physiology
  • Electroencephalography/methods
  • Evoked Potentials, Auditory/physiology
  • Fourier Analysis
  • Functional Laterality
  • Humans
  • Judgment/physiology
  • Male
  • Time Perception/physiology
  • Young Adult
Affiliation Not a UNIGE publication
Citation (ISO format)
BERNASCONI, Fosco et al. Pre-stimulus beta oscillations within left posterior sylvian regions impact auditory temporal order judgment accuracy. In: International journal of psychophysiology, 2011, vol. 79, n° 2, p. 244–248. doi: 10.1016/j.ijpsycho.2010.10.017
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Article (Published version)
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Identifiers
ISSN of the journal0167-8760
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