Study by Magnetic Resonance Imaging in the Progressive Forms of Multiple Sclerosis

Inclusion Criteria : * For Both patients and healthy volunteers : * Age limits ≥ 30 et ≤ 50 years * Subject able to understand the nature, the aim and the methodology of the study. * Collection of the informed consent * Affiliation or recipient with the mode of social security. * For the patients : * Suffering from progressive multiple sclerosis (primary progressive forms or secondary progressive forms) OR * Suffering from relapsing-remitting multiple sclerosis Exclusion Criteria : * For Both patients and healthy volunteers : * Systemic pathology with neurological manifestations * Antecedent of psychiatric disorders including psychosis (Except anxious depressive disorder) * Subject presenting contraindications in MRI (Ferromagnetic foreign bodies, pace-maker) * Claustrophobia * Women pregnant or Breast-feeding * Person with majority age protected by the law (supervision, trusteeship or under safeguard of justice). * Subject unable to understand the nature and the aim of the study and/or communication difficulties with investigator * Antecedent of serious cranial trauma (according to classification) of ischaemic stroke ou intracranial hematoma. * For the patients : * Antecedent of serious cranial trauma (according to classification), anterior or evolutive neurologic disease other than multiple sclerosis * Recent relapse of multiple sclerosis * For the healthy volunteers : * Antecedent of serious cranial trauma (according to classification), anterior or evolutive neurologic disease * Antecedent of neurological disease * In period of exclusion relative to another protocol or which the annual amount of the allowances maximum of 4500 € was reached.