Trans-spinal Direct Current Stimulation in Primary Orthostatic Tremor

Inclusion Criteria: * Patients with POT diagnosed since at least 1 year * Normal neurological examination with the exception of POT * Patients with or without treatment for TOP, or with treatment not sufficiently effective * Affiliated with the French social security scheme, universal medical coverages (CMU), or an equivalent scheme * Signed informed consent Exclusion Criteria: * Psychiatric or neurological conditions (with the exception of POT) * Presence of potential tsDCS risk factors including an electrically, magnetically or mechanically activated implant (including cardiac pacemaker, epidural stimulation electrodes, etc.), an intravascular clip or any other electrically sensitive support system, damaged skin at the stimulation sites (i.e., skin with ingrown hairs, acne, razor nicks, wounds that have not healed, recent scar tissue, broken skin, etc.) * Presence of TMS risk factor including cardiac pacemaker, history of epilepsy, traumatic brain injury with loss of consciousness, intracerebral clips, cochlear or ocular implants * Pregnancy in women (as determined by a urine pregnancy test in pre-menopausal women), or lactating women or women planning pregnancy during the course of the study * Patients enrolled in another biomedical research at the time of the study * Participant who does not wish to be informed of any clinically relevant abnormalities (as determined by the investigators) identified during the course of the study * Patient under guardianship or curators…