John Libbey Eurotext

Auditory aura in frontal opercular epilepsy: sounds from afar Volume 17, issue 2, June 2015


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1 Department of Neurology, University of Texas Health Science Center, Houston, Texas
2 Epilepsy Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio, USA
* Correspondence: Norman K So Department of Neurology, University of Washington Medical Center, 1959 NE Pacific St, Box 356115, Seattle, WA 98195, USA

Auditory auras are typically considered to localize to the temporal neocortex. Herein, we present two cases of frontal operculum/perisylvian epilepsy with auditory auras. Following a non-invasive evaluation, including ictal SPECT and magnetoencephalography, implicating the frontal operculum, these cases were evaluated with invasive monitoring, using stereoelectroencephalography and subdural (plus depth) electrodes, respectively. Spontaneous and electrically-induced seizures showed an ictal onset involving the frontal operculum in both cases. A typical auditory aura was triggered by stimulation of the frontal operculum in one. Resection of the frontal operculum and subjacent insula rendered one case seizure- (and aura-) free. From a hodological (network) perspective, we discuss these findings with consideration of the perisylvian and insular network(s) interconnecting the frontal and temporal lobes, and revisit the non-invasive data, specifically that of ictal SPECT.