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Published on: July 19, 2017
The relationship between basal level of anxiety and the affective response to inflammation
Hilary D Wilson1, Jessica Boyette-Davis, Perry N Fuchs
1University of Texas at Arlington, Department of Psychology, 501 South Nedderman Drive, Arlington, TX 76019, United States.
Abstract:
Pain is a multidimensional experience and is modulated by a number of factors. One such factor that plays a critical role in pain modulation is anxiety. However, the influence of individual differences in anxiety on higher order pain processing in rodents remains unclear. Therefore, the purpose of this study was to identify animals that have baseline levels of high and low anxiety using the elevated plus maze and then measure pain threshold and place escape/avoidance responding (a measure of pain affect) in the animals. As expected, there was a range of baseline behavior in the elevated plus maze that was used to separate animals into high and low anxiety groups. Following carrageenan injection, both groups of animals developed a similar degree of mechanical hypersensitivity and both groups showed similar place escape/avoidance behavior. These findings suggest that individual differences in baseline anxiety levels do not significantly contribute to the development of mechanical sensitivity and do not modulate higher order pain processing related to pain affect and motivation.
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