http://www.ncbi.nlm.nih.gov/disease/Brain.html
The nervous_system Alzheimer_disease Amyotrophic_lateral_sclerosis Angelman_syndrome Charcot-marie-tooth_disease Epilepsy Essential_tremor Fragile_x_syndrome Friedreich's ataxia Huntington_disease Niemann-pick_disease
while Huntington_disease, Fragile_x_syndrome and spinocerebellar atrophy are all'dynamic mutation'diseases in