| Acoustic experience but not attention modifies neural population phase expressed in human primary auditory cortex. | |
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MedLine Citation:
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PMID: 20633619 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We studied the effect of auditory training on the 40-Hz auditory steady-state response (ASSR) known to localize tonotopically to the region of primary auditory cortex (A1). The stimulus procedure was designed to minimize competitive interactions among frequency representations in A1 and delivered target events at random times in a training window, to increase the likelihood that neuroplastic changes could be detected. Experiment 1 found that repeated exposure to this stimulus advanced the phase of the ASSR (shortened the time delay between the 40-Hz response and stimulus waveforms). The phase advance appeared at the outset of the second of two sessions separated by 24-72 h, did not require active training, and was not accompanied by changes in ASSR amplitude over this time interval. Experiment 2 applied training for 10 sessions to reveal further advances in ASSR phase and also an increase in ASSR amplitude, but the amplitude effect lagged that on phase and did not correlate with perceptual performance while the phase advance did. A control group trained for a single session showed a phase advance but no amplitude enhancement when tested 6 weeks later (retention). In both experiments attention to auditory signals increased ASSR amplitude but had no effect on ASSR phase. Our results reveal a persistent form of neural plasticity expressed in the phase of ASSRs generated from the region of A1, which occurs either in A1 or in subcortical nuclei projecting to this region. |
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Authors:
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P E Gander; D J Bosnyak; L E Roberts |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-07-13 |
Journal Detail:
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Title: Hearing research Volume: 269 ISSN: 1878-5891 ISO Abbreviation: Hear. Res. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-06 Completed Date: 2010-12-28 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7900445 Medline TA: Hear Res Country: Netherlands |
Other Details:
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Languages: eng Pagination: 81-94 Citation Subset: IM |
Affiliation:
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Department of Psychology, Neuroscience, and Behaviour, McMaster University, Hamilton, Ontario L8S 4K1, Canada. pgander@mcmaster.ca |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation* Adolescent Adult Attention / physiology* Auditory Cortex / physiology* Auditory Perception / physiology Case-Control Studies Cochlear Nerve / physiology* Electroencephalography Electrophysiological Phenomena Female Humans Male Neuronal Plasticity / physiology Time Factors Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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//Canadian Institutes of Health Research |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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