Prospective Cohort Study of Neurogenetic Diseases

"* For patients: annual follow-up in Neurogenetic reference center, as part of routine care, with exhaustive standardised clinical evaluation~* Paraclinical monitoring (e.g. MRI, EEG, EMG, etc.) modelled on standard care according to current recommendations~* Biological samples offered to patients in the context of research:~ * Annual blood sample~ * Annual urine sample~ * Collection of 1 skin biopsy at the inclusion visit (for 30 patients)~ * Cerebrospinal fluid sample at the inclusion visit (for 15 patients"

"* controls without LP: 1 visit for blood, urine and optional skin biopsy~* controls with LP: additional blood and cerebrospinal fluid tubes for blood sampling and LP as part of routine care, without longitudinal follow-up"