AMPH and stiff-person syndrome: Anti-amphiphysin antibodies are typically associated with stiff-person syndrome (SPS) (i.e., a neurological syndrome characterized by axial rigidity, muscle stiffness, and startle reflex) (24, 25) whereas anti-GluR3 antibodies are generally observed in Rasmussen encephalitis, untreatable epilepsy and, less frequently, rhombencephalitis (26, 27).