Neurophysiological and Behavioral Study of the Cognitive Deficits Associated With Cerebral Small Vessel Disease in the SHIVA Cohort. SHIVA-CogNeurophys

Who May Qualify: - Patients included or previously included in the SHIVA cohort - Basic computer skills (ability to open a browser, use a mouse and keyboard) - Access to a personal computer with an internet connection - Independent in Activities of Daily Living (ADL) with a score ≥ 5/6, and in Instrumental Activities of Daily Living (IADL) with a score ≥ 4/8 - Informed and written consent signed by the participant and the investigating physician for this study Who Should NOT Join This Trial: - Motor impairments preventing the use of a keyboard and mouse (e.g., motor issues related to severe hand osteoarthritis) - Depressive symptoms indicated by a score of 2 to 4 on the mini Geriatric Depression Scale (mini GDS), which includes 4 items - Age-related macular degeneration (AMD) - Untreated glaucoma - Untreated psychiatric conditions that interfere with cognitive assessments - Diagnosed attention deficit disorder with or without hyperactivity or patients who could not complete all cognitive tests required in the SHIVA cohort - Systemic diseases that cause cognitive changes, such as obesity and metabolic disorders - History of epilepsy or seizures - Scalp sensitivity or skin lesions (dermatitis, wounds, etc.) Contraindications for the use of electrical stimulation: - Surgical clips, metal sutures, staples, stents - Osteosynthesis material in the head or neck - Pacemaker - Implanted hearing aid - Ocular foreign bodies, shrapnel, bullets - Metalworker - Pacemaker or neurostimulator - Heart valve or endovascular material - Ventricular shunt valve - Recent exposure (\< 6 months) to brain stimulation (tDCS, TMS, etc.) - Ongoing participation in a clinical trial or cognitive training program Always talk to your doctor about whether this trial is right for you.