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Updated: Feb 3, 2026

Author Spotlight: Studying Clinical Characters and Epilepsy Outcomes After Frontal Disconnection in Patients with MOGHE
Published on: August 16, 2024
Stimulation-induced ictal vocalisation of left frontal lobe origin
Leyla Baysal-Kirac1, Elisabeth Hartl2, Christian Vollmar3
1Epilepsy Center, Department of Neurology, University of Munich, Munich, Germany, Department of Neurology, Okmeydani Training and Research Hospital, Sisli, Istanbul, Turkey.
Abstract:
Pure ictal non-speech vocalisation occurs in frontal and temporal lobe epilepsies. Electrical stimulation of supplementary motor areas is reported to evoke vocalisation in selected patients. Here, we report a patient with focal epilepsy of the left anterior insula who had isolated monotonous vocalisation elicited by electrical stimulation of the left superior frontal gyrus. Quantitative analysis of audio signals was performed and compared with a former patient with left frontal lobe epilepsy who had pure ictal vocalisation. Both patients showed a comparable reduction in frequency variation indicating a monotonous voice. [Published with video sequences on www.epilepticdisorders.com].
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