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Behavioral and Brain Functions
Published in: Behavioral and Brain Functions 1/2009

Open Access 01-12-2009 | Review

Can sustained arousal explain the Chronic Fatigue Syndrome?

Authors: Vegard B Wyller, Hege R Eriksen, Kirsti Malterud

Published in: Behavioral and Brain Functions | Issue 1/2009

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Abstract

We present an integrative model of disease mechanisms in the Chronic Fatigue Syndrome (CFS), unifying empirical findings from different research traditions. Based upon the Cognitive activation theory of stress (CATS), we argue that new data on cardiovascular and thermoregulatory regulation indicate a state of permanent arousal responses – sustained arousal – in this condition. We suggest that sustained arousal can originate from different precipitating factors (infections, psychosocial challenges) interacting with predisposing factors (genetic traits, personality) and learned expectancies (classical and operant conditioning). Furthermore, sustained arousal may explain documented alterations by establishing vicious circles within immunology (Th2 (humoral) vs Th1 (cellular) predominance), endocrinology (attenuated HPA axis), skeletal muscle function (attenuated cortical activation, increased oxidative stress) and cognition (impaired memory and information processing). Finally, we propose a causal link between sustained arousal and the experience of fatigue. The model of sustained arousal embraces all main findings concerning CFS disease mechanisms within one theoretical framework.
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Metadata
Title
Can sustained arousal explain the Chronic Fatigue Syndrome?
Authors
Vegard B Wyller
Hege R Eriksen
Kirsti Malterud
Publication date
01-12-2009
Publisher
BioMed Central
Published in
Behavioral and Brain Functions / Issue 1/2009
Electronic ISSN: 1744-9081
DOI
https://doi.org/10.1186/1744-9081-5-10

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