| Motion-onset auditory-evoked potentials critically depend on history. | |
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MedLine Citation:
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PMID: 20352201 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of the present study was to determine whether motion history affects motion-onset auditory-evoked potentials (motion-onset AEPs). AEPs were recorded from 33 EEG channels in 16 subjects to the motion onset of a sound (white noise) virtually moving in the horizontal plane at a speed of 60 deg/s from straight ahead to the left (-30 degrees ). AEPs for baseline and adaptation were compared. A stimulus trial comprised three consecutive phases: 2,000 ms adaptation phase, 1,000 ms stationary phase, and 500 ms test phase. During the adaptation phase of the adaptation condition, a sound source moved twice from +30 degrees to -30 degrees to top up preceding adaptation. In the baseline condition, neither top-up nor pre-adaptation were exerted. For both conditions, a stationary sound was presented centrally in the stationary phase, moving leftwards in the test phase. Typical motion-onset AEPs were obtained for the baseline condition, namely a fronto-central response complex dominated by a negative and a positive component, the so-called change-N1 and change-P2 after around 180 and 250 ms, respectively. For the adaptation condition, this complex was shifted significantly into the positive range, indicating that adaptation abolished a negativity within a time window of approximately 160 to 270 ms. A respective shift into the negative range was evident at occipito-parietal sites. In conclusion, while adaptation has to be taken into account as a potential confound in the design of motion-AEP studies, it might also be of benefit in order to isolate AEP correlates of motion processing. |
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Authors:
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Ramona Grzeschik; Martin Böckmann-Barthel; Roland Mühler; Michael B Hoffmann |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-03-30 |
Journal Detail:
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Title: Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale Volume: 203 ISSN: 1432-1106 ISO Abbreviation: Exp Brain Res Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-05-04 Completed Date: 2010-08-02 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0043312 Medline TA: Exp Brain Res Country: Germany |
Other Details:
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Languages: eng Pagination: 159-68 Citation Subset: IM |
Affiliation:
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Department of Ophthalmology, Visual Processing Laboratory, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adaptation, Psychological / physiology* Adult Auditory Perception / physiology* Brain / physiology* Electroencephalography Evoked Potentials, Auditory / physiology* Female Humans Male Motion* Neuropsychological Tests Photic Stimulation Space Perception / physiology Time Factors Visual Perception / physiology Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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