Document Detail

Habituation of the orienting reflex and the development of Preliminary Process Theory.
MedLine Citation:
PMID:  18675927     Owner:  NLM     Status:  MEDLINE    
The orienting reflex (OR), elicited by an innocuous stimulus, can be regarded as a model of the organism's interaction with its environment, and has been described as the unit of attentional processing. A major determinant of the OR is the novelty of the eliciting stimulus, generally operationalized in terms of its reduction with stimulus repetition, the effects of which are commonly described in habituation terms. This paper provides an overview of a research programme, spanning more than 30 years, investigating psychophysiological aspects of the OR in humans. The major complication in this research is that the numerous physiological measures used as dependent variables in the OR context fail to jointly covary with stimulus parameters. This has led to the development of the Preliminary Process Theory (PPT) of the OR to accommodate the complexity of the observed stimulus-response patterns. PPT is largely grounded in autonomic measures, and current work is attempting to integrate electroencephalographic measures, particularly components in the event-related brain potentials reflecting aspects of stimulus processing. The emphasis in the current presentation is on the use of the defining criteria of the habituation phenomenon, and Groves and Thompson's Dual-process Theory, in the development of PPT.
Robert J Barry
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Publication Detail:
Type:  Journal Article     Date:  2008-08-15
Journal Detail:
Title:  Neurobiology of learning and memory     Volume:  92     ISSN:  1095-9564     ISO Abbreviation:  Neurobiol Learn Mem     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-06-01     Completed Date:  2009-08-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9508166     Medline TA:  Neurobiol Learn Mem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  235-42     Citation Subset:  IM    
Brain & Behaviour Research Institute and School of Psychology, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia.
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MeSH Terms
Brain / physiology
Evoked Potentials
Habituation, Psychophysiologic* / physiology
Models, Psychological*
Reflex* / physiology

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