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Neuromagnetic and neuroelectric oscillatory responses to acoustic stimulation with broadband noise

Johnson, B. W., Muthukumaraswamy, Suresh Daniel, Gaetz, W. C. and Cheyne, D. O. 2007. Neuromagnetic and neuroelectric oscillatory responses to acoustic stimulation with broadband noise. International Congress Series 1300 , pp. 41-44. 10.1016/j.ics.2007.02.029

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We investigated event-related oscillatory responses to acoustic stimulation with EEG and MEG measurements of brain function. EEG and MEG measurements were obtained from healthy adults presented with 500 ms segments of broadband noise presented to both ears via insert earphones. The results showed that auditory stimulation resulted in a reduction in beta band activity within 200 to 400 ms after stimulus onset. The magnitude of this effect was markedly larger when listeners actively attended to sounds than when they ignored them. These results support the conclusion that beta-band oscillations are directly influenced by activation of auditory cortex with acoustic stimulation. However these responses are also strongly modulated by attentional and/or motoric factors related to the auditory task.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Uncontrolled Keywords: Auditory evoked potential; EEG; MEG; Auditory perception; Brain mapping; Pitch perception; Sound localization
Additional Information: New Frontiers in Biomagnetism. Proceedings of the 15th International Conference on Biomagnetism, Vancouver, BC, Canada, August 21-25, 2006
Publisher: Elsevier
ISSN: 0531-5131
Last Modified: 09 Sep 2019 22:11

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