Does CRPS impair visuo-motor coordination in peripersonal space?
(2016) Pain Research Meeting — Location: Rauischholzhausen, Germany (19.September.2016)
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- Abstract
- Complex Regional Pain Syndrome (CRPS) is not only characterized by sensory, motor and vegetative symptoms, but also by cognitive changes in terms of body perception and representation (Legrain et al., 2012). However, CRPS patients’ performance at standard neglect tests is inconsistent (Kolb et al., 2012) and so far, we cannot conclude that these cognitive changes extend to stimuli presented in the space outside the body (i.e. peripersonal). Therefore, we used a line bisection task in a virtual reality environment in order to test whether upper-limb patients present an impaired perception and exploration of the peripersonal space around the affected hand. We hypothesized that these impairments would also be mediated by the vision of the affected hand and the feeling of where this hand is located (proprioception). To test these hypotheses, CRPS participants were asked to move a robotic handle with their unaffected hand in order to bisect the middle of lines projected on different positions on a horizontal semi-reflective mirror screen. Throughout the different testing conditions, they were asked to perform the task either in the workspace corresponding to their affected or unaffected body side, to put their affected hand inside or outside the workspace and to perform the task either while seeing or not their hands. Results showed that CRPS patients had a general bisecting bias towards the left side of space. This bias was more important when lines were projected further from the starting point in the unaffected body side.
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Citations
Verfaille, C., Cordova Bulens, D., Filbrich, L., Barbier, O., Libouton, X., Fraselle, V., Mouraux, D., Berquin, A., & Legrain, V. (2016). Does CRPS impair visuo-motor coordination in peripersonal space? Pain Research Meeting, Rauischholzhausen, Germany. https://hdl.handle.net/2078.5/267102