PonsBrain StemBrain Stem NeoplasmsBrainMedulla OblongataBrain Stem InfarctionsMyelinolysis, Central PontineMagnetic Resonance ImagingCerebellumReticular FormationOlivopontocerebellar AtrophiesCerebellar DiseasesMesencephalonDysarthriaRespirationAryldialkylphosphatasePolandCerebellar AtaxiaTrigeminal NerveLaughter