AR and Kennedy disease: Spinal and bulbar muscular atrophy (SBMA), also known as Kennedy’s disease, is a slowly progressive motor neuronopathy, which is X-linked and is caused by an expansion of the CAG repeat in the androgen receptor (AR) gene [225] and fragile X-associated tremor and ataxia syndrome (FXTAS), which is associated with CGG repeats in the FMR1 gene, also show neuronal intranuclear inclusions [226].