Technologies de rééducation

Le 14/10/2021 de 16:30 à 18:00

Retour Session


Influence de la posture et de l'exercice sur l'impression de navigation pendant une tâche d’observation d’action en réalité virtuelle

Justine Saint-Aubert (Rennes, France), Yoann Launey (Rennes, France), Isabelle Bonan (Rennes, France), Anatole Lécuyer (Rennes, France), Mélanie Cogné (Rennes, France)

Objective : A seated user watching his avatar walking in Virtual Reality (VR) and imagining being walking may feel an impression of navigating (IoN). Such a simulation might benefit to people unable to start a conventional gait rehabilitation due to fatigue or dyspnea during hospitalization in ICU. However, the IoN was studied for the walking task in sitting posture only, so this study aimed to evaluate the IoN induced by others postures and exercises.

Material / Patients and Methods : In a first experiment, 36 healthy participants observed their avatar walking while being standing, sitting or in Fowler’s posture. In a second experiment, 18 other participants were seated and observed their avatar walking, jogging, or stepping over obstacles. The IoN was evaluated using questionnaires through the impression of walking, jogging or stepping, and the impression of embodying the avatar (ownership, self-location and agency) (from 0-Strongly disagree to 7-Strongly agree).

Results : The impression of walking was good in sitting and standing posture (both m=5.0), and average with between-participant variability in Fowler’s posture (m=4.0, iqr=3.0).  The impression of walking and ownership were significantly lower in Fowler's posture (p<0.01). Regarding the exercises, participants had a good impression of walking (m=5.0), stepping (m=6.0) and jogging with variability (m=5.0, iqr=3.0).  

Discussion - Conclusion : This study demonstrates that VR action observation could be performed by participants in different postures and that different stages of difficulty could be presented. If possible, sitting posture is however recommended rather than Fowler’s posture. Future investigations will test the effect of the different exercises in participants with ICU-weakness.

Keywords : Gait Rehabilitation, Action observation,  Imagination of movement, Virtual Reality