JOINT VIRTUAL REALITY AND NEUROSTIMULATION METHODS FOR VISUOMOTOR REHABILITATION

摘要

A virtual reality (VR) system is used to render a 3D VR game scene comprising at least one VR object stimulus on a VR head mounted display screen. During a first training session, the VR system measures commands from the user dominant hand with a VR handle, and the time series of respectively the user head and the user hand positions and/or orientations vectors, as well as the time series of the user gaze direction vectors relative to the user head position and orientation origin in the 3D virtual environment. A HD-tDCS neurostimulation is applied to the user in a time range between one hour before and one hour after the first session. The VR system compares the measured user motion time series data with a reference motion time series data to determine a user motion drift for the first session, possibly with a principal component analysis (PCA) or a functional principal component analysis (FPCA) to extract and compare the principal components of the user motion time series of positions and/or orientations. If the user motion drift exceeds a threshold, the VR system adapts the rendering of at least one property of the VR object stimulus and/or the HT-tDCS neurostimulation in a next session.