Cortico-hypoglossal and corticospinal conduction abnormality in Bickerstaffʹs brainstem encephalitis

The Miller Fisher syndrome, Guillain–Barre syndrome and Bickerstaffʹs brainstem encephalitis are related conditions in which anti-GQ1b antibody positivity occur in varied frequencies. This report demonstrates the presence of corticobulbar and corticospinal dysfunction in BBE, by means of a novel transcranial magnetic stimulation technique. It further supports the presence of protean manifestations in anti-GQ1b IgG antibody-positive spectrum of disorders.