Adaptation to virtual prisms and its relevance for neglect rehabilitation: a single-blind dose-response study with healthy participants

Article Article scientifique Article Adaptation to virtual prisms and its relevance for neglect rehabilitation: a single-blind dose-response study with healthy participants eng 2020 author Gammeri Roberto 880655 author Turri Francesco 701799 author Ricci Raffaella author Ptak Radek 0000-0003-4708-9201 128547 753-766 10.1080/09602011.2018.1502672 30040026 0960-2011 Prism adaptation (PA) has been applied with mixed success as a rehabilitation method of spatial neglect. Results from many single-case and multiple case studies as well as randomised controlled trials do not produce a clear picture of the efficacy of PA. We here tested a new method of PA, by inducing adaptation effects in the virtual reality. Healthy participants were attributed to one of four groups: no deviation, 10-, 20-, or 30-degrees rightward deviation. In contrast to classical wedge prisms, we induced the visual shift progressively. Participants performed two variants of the bisection and the landmark task to measure cognitive transfer of adaptation effects. Pointing error was directly related to the degree of optical deviation, and was greatest immediately following adaptation. Transfer was only observed in the bisection tasks, and only in the 30-degrees group. Due to the gradual induction of the spatial deviation the majority of participants were unaware of the adaptation effects. These findings show that large rightward deviation may affect sensorimotor performance in healthy participants similarly to neglect patients. Moreover, the finding that only participants adapted to 30-degrees showed biased bisection performance suggests that a critical threshold must be reached in order to induce significant visuomotor transfer. Spatial neglect Line bisection Visual attention Prism adaptation Rehabilitation Dewey 150 Dewey 616.8 Swiss National Science Foundation Tracking attentional priority in the human brain: Studies of acquired and virtual lesions 320030_152689 CH Project funding 61 Département des neurosciences cliniques 226 108 Section de psychologie 71 false 432 Lésions cérébrales et attention spatiale 705 Neuropsychological Rehabilitation 30 4 cf70c01f-29f0-450f-9415-ecc0ef6f7c98 Article (Published version) Restricted gammeri2018a.pdf 1481552 application/pdf restrictedAccess Faculté de médecine / Section de médecine clinique / Département des neurosciences cliniques Faculté de psychologie et des sciences de l'éducation / Section de psychologie

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Adaptation to virtual prisms and its relevance for neglect rehabilitation: a single-blind dose-response study with healthy participants	Neuropsychological Rehabilitation			2020	299	4

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Gammeri, Roberto