Unilateral spatial neglect (USN) is a highly-prevalent neuropsychological syndrome following a cerebral stroke characterized by massive impairments in daily life. The evaluation and the rehabilitation of USN encounter many limits whereas immersive virtual reality (VR) could be an efficient tool to go through these limits by imitating an environment of perception and action very close to the real one. The investigators will test a multisensory battery of evaluation based on VR for the diagnostic of USN.