Modulation and Assessment of Mental Flexibility in Dysexecutive Brain Patients

Inclusion Criteria: * Affiliated to social security * Signed informed consent * Mother tongue: French * Right handed (Edimburg Scale) * Frontal traumatic brain injury or stroke responsible for a dysexecutive syndrome assessed by the GREFEX battery. Exclusion Criteria: * Claustrophobia * Addiction * Major Hearing or Visual loss * Hearing prosthesis * Metal intraocular implant * Cardiac prosthesis * High Blood pressure * Severe cardiac insufficiency * Uncompensated thyroid disorders * Major neuropsychological disorder * Family or personal history of epilepsy * Pregnancy * Female subject of childbearing age not receiving effective contraception. * Participation in another experimental protocol involving brain stimulation within the last 4 weeks * Person under the protection of justice, tutorship or curatorship * MRI contraindication * Refusal to be informed of a new anomaly detected during the MRI examination * Other traumatic brain injury or neuropsychological disorder