| Pupillary responses and event-related potentials as indices of the orienting reflex. | |
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MedLine Citation:
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PMID: 21848607 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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This study examined skin conductance responses, the late positive complex of the event-related potential, and pupillary dilation responses as autonomic and central correlates of the orienting reflex (OR) in the context of indifferent and significant stimuli. In particular, we aimed to clarify the inconsistencies surrounding the pupillary dilation response as an OR index. An auditory dishabituation paradigm was employed, and physiological measures were recorded from 24 participants. Response decrement to a repeated stimulus, response recovery to a change stimulus, and subsequent dishabituation were assessed. Findings confirmed expectations that the skin conductance response and the late positive complex are indices of the OR. The pupillary dilation response, however, demonstrated an unexpected sensitivity to stimulus novelty only, while the prestimulus measure of tonic pupil diameter showed the significance effect that was expected of the phasic measure. Together, these findings argue against the suggestion that the pupillary dilation response is an OR index. The diverse results obtained from this experiment contribute to our understanding of the OR, and provide impetus for further research with a variety of paradigm manipulations. |
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Authors:
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Genevieve Z Steiner; Robert J Barry |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-17 |
Journal Detail:
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Title: Psychophysiology Volume: - ISSN: 1540-5958 ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-8-18 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0142657 Medline TA: Psychophysiology Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Society for Psychophysiological Research. |
Affiliation:
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Brain & Behaviour Research Institute and School of Psychology, University of Wollongong, Wollongong NSW, Australia. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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