Antibodies directed against anti-neurofascin-155 have been linked with CIDP and tremor in 42% of cases [19]: this tremor is usually severe, postural and mainly affects the upper limbs, but can be observed in the tongue and is usually associated with ataxia, CNS demyelination and poor response to IVIg [19, 20, 21]. This evidence concerns the gene NFASC and Ataxia.