[article] 
inAnnals of physical and rehabilitation medicine > Vol. 61, n°6 (Novembre 2018) . - p. 372-379

Titre :	Influence of non-contextual auditory stimuli on navigation in a virtual reality context involving executive functions among patients after stroke
Type de document :	texte imprimé
Auteurs :	Mélanie Cogné ; Marie-Hélène Voilleau ; Evelyne Klinger ; Pierre-Alain Joseph
Année de publication :	2018
Article en page(s) :	p. 372-379
Note générale :	Doi : 10.1016/j.rehab.2018.01.002
Langues :	Anglais (eng)
Mots-clés :	Spatial navigation  Virtual reality  VAP-S  Auditory stimuli  Executive functions  Inhibit
Résumé :	Background Topographical disorientation is frequent among patients after a stroke and can be well explored with virtual environments (VEs). VEs also allow for the addition of stimuli. A previous study did not find any effect of non-contextual auditory stimuli on navigational performance in the virtual action planning-supermarket (VAP-S) simulating a medium-sized 3D supermarket. However, the perceptual or cognitive load of the sounds used was not high. Objective We investigated how non-contextual auditory stimuli with high load affect navigational performance in the VAP-S for patients who have had a stroke and any correlation between this performance and dysexecutive disorders. Methods Four kinds of stimuli were considered: sounds from living beings, sounds from supermarket objects, beeping sounds and names of other products that were not available in the VAP-S. The condition without auditory stimuli was the control. The Groupe de réflexion pour l’évaluation des fonctions exécutives (GREFEX) battery was used to evaluate executive functions of patients. Results The study included 40 patients who have had a stroke (n=22 right-hemisphere and n=18 left-hemisphere stroke). Patients’ navigational performance was decreased under the 4 conditions with non-contextual auditory stimuli (P<0.05), especially for those with dysexecutive disorders. For the 5 conditions, the lower the performance, the more GREFEX tests were failed. Patients felt significantly disadvantaged by the non-contextual sounds sounds from living beings, sounds from supermarket objects and names of other products as compared with beeping sounds (P<0.01). Patients’ verbal recall of the collected objects was significantly lower under the condition with names of other products (P<0.001). Left and right brain-damaged patients did not differ in navigational performance in the VAP-S under the 5 auditory conditions. Conclusions These non-contextual auditory stimuli could be used in neurorehabilitation paradigms to train patients with dysexecutive disorders to inhibit disruptive stimuli.
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[article] Influence of non-contextual auditory stimuli on navigation in a virtual reality context involving executive functions among patients after stroke [texte imprimé] / Mélanie Cogné ; Marie-Hélène Voilleau ; Evelyne Klinger ; Pierre-Alain Joseph . - 2018 . - p. 372-379.
Doi : 10.1016/j.rehab.2018.01.002
Langues : Anglais (eng)
in Annals of physical and rehabilitation medicine > Vol. 61, n°6 (Novembre 2018) . - p. 372-379

Mots-clés :	Spatial navigation  Virtual reality  VAP-S  Auditory stimuli  Executive functions  Inhibit
Résumé :	Background Topographical disorientation is frequent among patients after a stroke and can be well explored with virtual environments (VEs). VEs also allow for the addition of stimuli. A previous study did not find any effect of non-contextual auditory stimuli on navigational performance in the virtual action planning-supermarket (VAP-S) simulating a medium-sized 3D supermarket. However, the perceptual or cognitive load of the sounds used was not high. Objective We investigated how non-contextual auditory stimuli with high load affect navigational performance in the VAP-S for patients who have had a stroke and any correlation between this performance and dysexecutive disorders. Methods Four kinds of stimuli were considered: sounds from living beings, sounds from supermarket objects, beeping sounds and names of other products that were not available in the VAP-S. The condition without auditory stimuli was the control. The Groupe de réflexion pour l’évaluation des fonctions exécutives (GREFEX) battery was used to evaluate executive functions of patients. Results The study included 40 patients who have had a stroke (n=22 right-hemisphere and n=18 left-hemisphere stroke). Patients’ navigational performance was decreased under the 4 conditions with non-contextual auditory stimuli (P<0.05), especially for those with dysexecutive disorders. For the 5 conditions, the lower the performance, the more GREFEX tests were failed. Patients felt significantly disadvantaged by the non-contextual sounds sounds from living beings, sounds from supermarket objects and names of other products as compared with beeping sounds (P<0.01). Patients’ verbal recall of the collected objects was significantly lower under the condition with names of other products (P<0.001). Left and right brain-damaged patients did not differ in navigational performance in the VAP-S under the 5 auditory conditions. Conclusions These non-contextual auditory stimuli could be used in neurorehabilitation paradigms to train patients with dysexecutive disorders to inhibit disruptive stimuli.
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