Mariani, V;
Balestrini, S;
Gozzo, F;
Pelliccia, V;
Mai, R;
Francione, S;
Sartori, I;
... Tassi, L; + view all
(2021)
Intracerebral electrical stimulations of the temporal lobe: a stereo-electroencephalography study.
European Journal of Neuroscience
, 54
(4)
pp. 5368-5383.
10.1111/ejn.15377.
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Abstract
The functional anatomy of the anteromesial portion of the temporal lobe and its involvement in epilepsy can be explored by means of intracerebral electrical stimulations. Here, we aimed to expand the knowledge of its physiological and pathophysiological symptoms by conducting the first large-sample systematic analysis of 1529 electrical stimulations of this anatomical region. We retrospectively analysed all clinical manifestations induced by intracerebral electrical stimulations in 173 patients with drug-resistant focal epilepsy with at least one electrode implanted in this area. We found that high-frequency stimulations were more likely to evoke electroclinical manifestations (p < .0001) and also provoked ‘false positive’ seizures. Multimodal symptoms were associated with EEG electrical modification (after discharge) (p < .0001). Visual symptoms were not associated with after discharge (p = .0002) and were mainly evoked by stimulation of the hippocampus (p = .009) and of the parahippocampal gyrus (p = .0212). ‘False positive seizures’ can be evoked by stimulation of the hippocampus, parahippocampal gyrus and amygdala, likely due to their intrinsic low epileptogenic threshold. Visual symptoms evoked in the hippocampus and parahippocampal gyrus, without EEG changes, are physiological symptoms and suggest involvement of these areas in the visual ventral stream. Our findings provide meaningful guidance in the interpretation of intracranial EEG studies of the temporal lobe.
| Type: | Article |
|---|---|
| Title: | Intracerebral electrical stimulations of the temporal lobe: a stereo-electroencephalography study |
| Location: | France |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1111/ejn.15377 |
| Publisher version: | https://doi.org/10.1111/ejn.15377 |
| Language: | English |
| Additional information: | © 2021 The Authors. European Journal of Neuroscience published by Federation of European Neuroscience Societies and John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
| Keywords: | Clinical neurophysiology, epilepsy surgery, stereo-EEG, temporal lobe epilepsy, visual stream |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Clinical and Experimental Epilepsy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10131291 |
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