Olfactory hallucinations elicited by electrical stimulation via subdural electrodes: effects of direct stimulation of olfactory bulb and tract.

Epilepsy & Behavior : E&B
Gogi KumarEishi Asano

Abstract

In 1954, Penfield and Jasper briefly described that percepts of unpleasant odor were elicited by intraoperative electrical stimulation of the olfactory bulb in patients with epilepsy. Since then, few peer-reviewed studies have reported such phenomena elicited by stimulation mapping via subdural electrodes implanted on the ventral surface of the frontal lobe. Here, we determined what types of olfactory hallucinations could be reproduced by such stimulation in children with focal epilepsy. This study included 16 children (age range: 5 to 17 years) who underwent implantation of subdural electrodes to localize the presumed epileptogenic zone and eloquent areas. Pairs of electrodes were electrically stimulated, and clinical responses were observed. In case a patient reported a perception, she/he was asked to describe its nature. We also described the stimulus parameters to elicit a given symptom. Eleven patients reported a perception of smell in response to electrical stimulation while the remaining five did not. Nine patients perceived an unpleasant smell (like bitterness, smoke, or garbage) while two perceived a pleasant smell (like strawberry or good food). Such olfactory hallucinations were induced by stimulation proximal to the...Continue Reading

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Citations

Dec 10, 2013·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Goichiro ToyodaEishi Asano
Nov 29, 2015·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Masaaki NishidaEishi Asano
Apr 4, 2016·Current Pain and Headache Reports·Paul G Mathew, Carrie E Robertson
May 15, 2016·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Yutaka NonodaEishi Asano
Jun 1, 2014·Progress in Neuro-psychopharmacology & Biological Psychiatry·Ti-Fei Yuan, Burton M Slotnick
Dec 30, 2014·Frontiers in Neurology·David N Vaughan, Graeme D Jackson
Jun 18, 2017·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Masaaki NishidaEishi Asano
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Mar 24, 2017·Brain : a Journal of Neurology·Yasuo NakaiEishi Asano
Jun 25, 2019·Frontiers in Neuroscience·Gabriel VillafuerteOscar Arias-Carrión
Nov 7, 2019·Otolaryngologic Clinics of North America·Eric H Holbrook, Daniel H Coelho
Apr 15, 2020·Brain Stimulation·Devin AdairMarom Bikson

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