Modifications végétatives, somatiques et de l'état d'anxiété en réponse à un stress modéré: influence de caractéristiques individuelles ou situationnelles

Abstract : Exposure to stressful situations is typically associated with cognitive, affective, physiological and behavioral responses. The aim of this work was to examine the affective and physiological responses to moderate stress, particularly state anxiety and muscle tension and also to consider the characteristics of the situation and the trait anxiety of the subjects. Our results showed that high anxious subjects have a higher level of state-anxiety than low anxious subjects during the stressful task, but no difference in physiological reactivity has been found between both groups. However, after exposure to the stressful situation, high anxious subjects have delayed physiological recovery. This suggests that physiological differences might emerge during the recovery period according to trait anxiety level. Thus, affective and physiological responses could depend on trait anxiety level. Furthermore, our results showed in individuals with homogeneous trait anxiety level that muscle tension induced by the stressful situation could differ depending on the muscles. This result suggests a relationship between the different muscular responses and the functional role of the muscles. Moreover, the results showed that state anxiety and these muscular responses decrease during a second exposure to the same stressful situation, except for the trapezius muscle which seems to have a particular reactivity to the stressor. However, adaptation of these muscular modifications and of state anxiety suggests that affective and muscular responses could be influenced by the characteristics of the situation (novelty and repetition). In conclusion, these findings highlight the importance of considering the environmental characteristics and the personality trait of individuals in research on stress responses
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Magali Willmann. Modifications végétatives, somatiques et de l'état d'anxiété en réponse à un stress modéré: influence de caractéristiques individuelles ou situationnelles. Médecine humaine et pathologie. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0399⟩. ⟨tel-01749957⟩

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