Could a simple walk recalibrate the Brain's sense of self?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Criteria common to all participants: * Men or women aged 18 to 60 inclusive * Subject affiliated to a health insurance scheme, beneficiary or beneficiary's beneficiary * Able to understand the aims and risks of the research, and to give informed consent * Visual acuity \> 0.7 on the Freiburg Vision Test (Bach 1996) due to the use of visual equipment * BMI (body mass index) \< 40 (due to cardiovascular risk). Patient-specific criteria: * With schizophrenia: criteria for schizophrenia as defined in the DSMV (American Psychiatric Association, 2015) * With borderline personality disorder: criteria for borderline personality disorder as defined in the DSMV (American Psychiatric Association, 2015) * With vestibular disorders: peripheral vestibular disorders established after otolaryngological examination Exclusion Criteria: * Criteria common to all participants: * Serious or unstabilized somatic pathology (including cardiovascular) * History likely to affect cerebral anatomy or to be linked to an abnormality (neonatal suffering, neurosurgical operation, comitiality, stroke...) * Presence of joint pain, likely to worsen after exercise * \- Substance use disorders (as defined by DSM-IV TR) * 3D vision disorders as measured by the Wirt stereotest (depth perception at a disparity of at least 80'' arc) * Movement perception disorders (correct movement discrimination in less than 75% of trials (cf. § V-2.2) * History of general anaesthesia in the 3 months preceding the study * History of neurological disease * Impossibility of giving the subject informed information (subject in emergency situation) * Pregnancy declared by patient * Breast-feeding * Subject in exclusion period (determined by a previous or current study) * Subject hospitalized * Subject under court protection Exclusion criteria specific to control subjects or patients with vestibular syndrome: History of major psychiatric pathology with current psychotropic medication (i.e., antidepressant, thymoregulator, antipsychotic)