AUTHOR=Morrison Miranda , Korda Athanasia , Wagner Franca , Caversaccio Marco Domenico , Mantokoudis Georgios 

TITLE=Case Report: Fremitus Nystagmus in Superior Canal Dehiscence Syndrome

JOURNAL=Frontiers in Neurology

VOLUME=13

YEAR=2022

URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2022.844687

DOI=10.3389/fneur.2022.844687

ISSN=1664-2295

ABSTRACT=<p>Superior canal dehiscence syndrome (SCDS) is a structural bony defect of the roof of the superior semi-circular canal into the middle cranial fossa and is responsible for the creation of a third window, which alters the dynamics of the inner ear. During humming, vibratory waves entering the vestibulum and cochlea are re-routed through the dehiscence, leading to stimulation of the otolithic and ampullary vestibular organs. This is responsible for the torsional-vertical nystagmus known as “fremitus nystagmus”. In this case report, we video-document a rare case of fremitus nystagmus and its resolution after plugging of the superior semi-circular canal.</p>