| Dynamics of gamma-band activity induced by auditory pattern changes in humans. | |
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MedLine Citation:
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PMID: 11739268 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Increasing evidence suggests separate auditory pattern and space processing streams. The present paper describes two magnetoencephalogram studies examining gamma-band activity to changes in auditory patterns using consonant-vowel syllables (experiment 1), animal vocalizations and artificial noises (experiment 2). Two samples of each sound type were presented to passively listening subjects in separate oddball paradigms with 80% standards and 20% deviants differing in their spectral composition. Evoked magnetic mismatch fields peaking approximately 190 ms poststimulus showed a trend for a left-hemisphere advantage for syllables, but no hemispheric differences for the other sounds. Frequency analysis and statistical probability mapping of the differences between deviants and standards revealed increased gamma-band activity above 60 Hz over left anterior temporal/ventrolateral prefrontal cortex for all three types of stimuli. This activity peaked simultaneously with the mismatch responses for animal sounds (180 ms) but was delayed for noises (260 ms) and syllables (320 ms). Our results support the hypothesized role of anterior temporal/ventral prefrontal regions in the processing of auditory pattern change. They extend earlier findings of gamma-band activity over posterior parieto-temporal cortex during auditory spatial processing that supported the putative auditory dorsal stream. Furthermore, earlier gamma-band responses to animal vocalizations may suggest faster processing of fear-relevant information. |
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Authors:
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Jochen Kaiser; Werner Lutzenberger; Hermann Ackermann; Niels Birbaumer |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Cerebral cortex (New York, N.Y. : 1991) Volume: 12 ISSN: 1047-3211 ISO Abbreviation: Cereb. Cortex Publication Date: 2002 Feb |
Date Detail:
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Created Date: 2001-12-12 Completed Date: 2002-03-14 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9110718 Medline TA: Cereb Cortex Country: United States |
Other Details:
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Languages: eng Pagination: 212-21 Citation Subset: IM |
Affiliation:
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MEG Center, Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Germany. jochen.kaiser@uni-tuebingen.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Auditory Cortex / physiology* Auditory Perception / physiology* Brain Mapping Evoked Potentials, Auditory / physiology* Female Humans Magnetoencephalography Male |
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