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López-Madrona VJ, Villalon SM, Velmurugan J, Semeux-Bernier A, Garnier E, Badier JM, Schön D, Bénar CG. Reconstruction and localization of auditory sources from intracerebral SEEG using independent component analysis. Neuroimage 2023; 269:119905. [PMID: 36720438 DOI: 10.1016/j.neuroimage.2023.119905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 01/11/2023] [Accepted: 01/26/2023] [Indexed: 01/30/2023] Open
Abstract
Stereo-electroencephalography (SEEG) is the surgical implantation of electrodes in the brain to better localize the epileptic network in pharmaco-resistant epileptic patients. This technique has exquisite spatial and temporal resolution. Still, the number and the position of the electrodes in the brain is limited and determined by the semiology and/or preliminary non-invasive examinations, leading to a large number of unexplored brain structures in each patient. Here, we propose a new approach to reconstruct the activity of non-sampled structures in SEEG, based on independent component analysis (ICA) and dipole source localization. We have tested this approach with an auditory stimulation dataset in ten patients. The activity directly recorded from the auditory cortex served as ground truth and was compared to the ICA applied on all non-auditory electrodes. Our results show that the activity from the auditory cortex can be reconstructed at the single trial level from contacts as far as ∼40 mm from the source. Importantly, this reconstructed activity is localized via dipole fitting in the proximity of the original source. In addition, we show that the size of the confidence interval of the dipole fitting is a good indicator of the reliability of the result, which depends on the geometry of the SEEG implantation. Overall, our approach allows reconstructing the activity of structures far from the electrode locations, partially overcoming the spatial sampling limitation of intracerebral recordings.
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Affiliation(s)
| | - Samuel Medina Villalon
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille 13005, France; APHM, Timone Hospital, Epileptology and cerebral rhythmology, Marseille 13005, France
| | - Jayabal Velmurugan
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille 13005, France
| | | | - Elodie Garnier
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille 13005, France
| | - Jean-Michel Badier
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille 13005, France
| | - Daniele Schön
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille 13005, France
| | - Christian-G Bénar
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille 13005, France.
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Chaton L, Chochoi M, Reyns N, Lopes R, Derambure P, Szurhaj W. Localization of an epileptic orgasmic feeling to the right amygdala, using intracranial electrodes. Cortex 2018; 109:347-51. [PMID: 30126613 DOI: 10.1016/j.cortex.2018.07.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 06/26/2018] [Accepted: 07/11/2018] [Indexed: 11/22/2022]
Abstract
The limbic system has well-known functions in the regulation of human emotions and behaviour in general and sexual behaviour in particular. However, it is not clear which components of the limbic system are involved in orgasmic feelings. Although orgasmic aura can be elicited by direct electrical stimulation of the right mesial temporal lobe, the location of spontaneous and isolated orgasmic auras have not yet been reported in the literature. Here, we report on the first case of spontaneous orgasmic aura associated with a discharge in the right amygdala, following an investigation with depth electrodes in a woman with temporal lobe epilepsy. Her ictal orgasmic feeling reportedly felt the same as her physiological orgasms. This case sheds light on the amygdala's key role in human sexual function.
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Jonas J, Rossion B, Brissart H, Frismand S, Jacques C, Hossu G, Colnat-Coulbois S, Vespignani H, Vignal JP, Maillard L. Beyond the core face-processing network: Intracerebral stimulation of a face-selective area in the right anterior fusiform gyrus elicits transient prosopagnosia. Cortex 2015; 72:140-155. [PMID: 26143305 DOI: 10.1016/j.cortex.2015.05.026] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Revised: 05/02/2015] [Accepted: 05/19/2015] [Indexed: 11/18/2022]
Abstract
According to neuropsychological evidence, a distributed network of regions of the ventral visual pathway - from the lateral occipital cortex to the temporal pole - supports face recognition. However, functional magnetic resonance imaging (fMRI) studies have generally confined ventral face-selective areas to the posterior section of the occipito-temporal cortex, i.e., the inferior occipital gyrus occipital face area (OFA) and the posterior and middle fusiform gyrus fusiform face area (FFA). There is recent evidence that intracranial electrical stimulation of these areas in the right hemisphere elicits face matching and recognition impairments (i.e., prosopagnosia) as well as perceptual face distortions. Here we report a case of transient inability to recognize faces following electrical stimulation of the right anterior fusiform gyrus, in a region located anteriorly to the FFA. There was no perceptual face distortion reported during stimulation. Although no fMRI face-selective responses were found in this region due to a severe signal drop-out as in previous studies, intracerebral face-selective event-related potentials and gamma range electrophysiological responses were found at the critical site of stimulation. These results point to a causal role in face recognition of the right anterior fusiform gyrus and more generally of face-selective areas located beyond the "core" face-processing network in the right ventral temporal cortex. It also illustrates the diagnostic value of intracerebral electrophysiological recordings and stimulation in understanding the neural basis of face recognition and visual recognition in general.
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Affiliation(s)
- Jacques Jonas
- Service de Neurologie, Centre Hospitalier Universitaire de Nancy, Nancy, France; UMR 7039, CNRS, Université de Lorraine, Nancy, France; Université de Louvain, Louvain-La-Neuve, Belgium
| | | | - Hélène Brissart
- Service de Neurologie, Centre Hospitalier Universitaire de Nancy, Nancy, France
| | - Solène Frismand
- Service de Neurologie, Centre Hospitalier Universitaire de Nancy, Nancy, France
| | | | - Gabriela Hossu
- CIC-IT, Centre Hospitalier Universitaire de Nancy, Nancy, France
| | | | - Hervé Vespignani
- Service de Neurologie, Centre Hospitalier Universitaire de Nancy, Nancy, France; UMR 7039, CNRS, Université de Lorraine, Nancy, France
| | - Jean-Pierre Vignal
- Service de Neurologie, Centre Hospitalier Universitaire de Nancy, Nancy, France; UMR 7039, CNRS, Université de Lorraine, Nancy, France
| | - Louis Maillard
- Service de Neurologie, Centre Hospitalier Universitaire de Nancy, Nancy, France; UMR 7039, CNRS, Université de Lorraine, Nancy, France
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Jonas J, Rossion B, Krieg J, Koessler L, Colnat-Coulbois S, Vespignani H, Jacques C, Vignal JP, Brissart H, Maillard L. Intracerebral electrical stimulation of a face-selective area in the right inferior occipital cortex impairs individual face discrimination. Neuroimage 2014; 99:487-97. [PMID: 24936686 DOI: 10.1016/j.neuroimage.2014.06.017] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 06/05/2014] [Accepted: 06/06/2014] [Indexed: 01/16/2023] Open
Abstract
During intracerebral stimulation of the right inferior occipital cortex, a patient with refractory epilepsy was transiently impaired at discriminating two simultaneously presented photographs of unfamiliar faces. The critical electrode contact was located in the most posterior face-selective brain area of the human brain (right "occipital face area", rOFA) as shown both by low- (ERP) and high-frequency (gamma) electrophysiological responses as well as a face localizer in fMRI. At this electrode contact, periodic visual presentation of 6 different faces by second evoked a larger electrophysiological periodic response at 6 Hz than when the same face identity was repeated at the same rate. This intracerebral EEG repetition suppression effect was markedly reduced when face stimuli were presented upside-down, a manipulation that impairs individual face discrimination. These findings provide original evidence for a causal relationship between the face-selective right inferior occipital cortex and individual face discrimination, independently of long-term memory representations. More generally, they support the functional value of electrophysiological repetition suppression effects, indicating that these effects can be used as an index of a necessary neural representation of the changing stimulus property.
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Affiliation(s)
- Jacques Jonas
- Service de Neurologie, Centre Hospitalier Universitaire de Nancy, 29 Avenue du Maréchal de Lattre de Tassigny, 54000 Nancy, France; Université de Lorraine, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France; CNRS, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France; Faculté de Médecine de Nancy, Université de Lorraine, 9 Avenue de la Forêt de Haye, 54500 Vandœuvre-lès-Nancy, France; Université Catholique de Louvain, 10 Place du Cardinal Mercier, 1348 Louvain-La-Neuve, Belgium.
| | - Bruno Rossion
- Université Catholique de Louvain, 10 Place du Cardinal Mercier, 1348 Louvain-La-Neuve, Belgium
| | - Julien Krieg
- Université de Lorraine, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France; CNRS, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France
| | - Laurent Koessler
- Université de Lorraine, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France; CNRS, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France
| | - Sophie Colnat-Coulbois
- Faculté de Médecine de Nancy, Université de Lorraine, 9 Avenue de la Forêt de Haye, 54500 Vandœuvre-lès-Nancy, France; Service de Neurochirurgie, Centre Hospitalier Universitaire de Nancy, 29 Avenue du Maréchal de Lattre de Tassigny, 54000 Nancy, France
| | - Hervé Vespignani
- Service de Neurologie, Centre Hospitalier Universitaire de Nancy, 29 Avenue du Maréchal de Lattre de Tassigny, 54000 Nancy, France; Université de Lorraine, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France; CNRS, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France; Faculté de Médecine de Nancy, Université de Lorraine, 9 Avenue de la Forêt de Haye, 54500 Vandœuvre-lès-Nancy, France
| | - Corentin Jacques
- Université Catholique de Louvain, 10 Place du Cardinal Mercier, 1348 Louvain-La-Neuve, Belgium
| | - Jean-Pierre Vignal
- Service de Neurologie, Centre Hospitalier Universitaire de Nancy, 29 Avenue du Maréchal de Lattre de Tassigny, 54000 Nancy, France; Université de Lorraine, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France; CNRS, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France
| | - Hélène Brissart
- Service de Neurologie, Centre Hospitalier Universitaire de Nancy, 29 Avenue du Maréchal de Lattre de Tassigny, 54000 Nancy, France
| | - Louis Maillard
- Service de Neurologie, Centre Hospitalier Universitaire de Nancy, 29 Avenue du Maréchal de Lattre de Tassigny, 54000 Nancy, France; Université de Lorraine, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France; CNRS, CRAN, UMR 7039, Campus Sciences, Boulevard des Aiguillettes, 54500 Vandœuvre-lès-Nancy, France; Faculté de Médecine de Nancy, Université de Lorraine, 9 Avenue de la Forêt de Haye, 54500 Vandœuvre-lès-Nancy, France
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Châtillon CE, Zelmann R, Hall JA, Olivier A, Dubeau F, Gotman J. Influence of contact size on the detection of HFOs in human intracerebral EEG recordings. Clin Neurophysiol 2013; 124:1541-6. [PMID: 23578565 DOI: 10.1016/j.clinph.2013.02.113] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2012] [Revised: 02/08/2013] [Accepted: 02/27/2013] [Indexed: 10/27/2022]
Abstract
OBJECTIVE High frequency oscillations (HFOs) are brief electroencephalographic events associated with epileptic activity, and likely representing biological markers of the epileptogenic zone. HFOs are usually detected with intracranial EEG and detection is influenced by contact size. The size of commercially available intracerebral electrodes varies widely. This study assesses HFO detection rates from adjacent electrode contacts in human intracerebral recordings. METHODS Intracerebral recordings were collected from 11 patients undergoing stereoelectroencephalographic investigation using hybrid depth electrodes containing adjacent large (0.8 or 5 mm(2)) and small (0.2 or 0.3 mm(2)) contacts. HFOs were marked manually during 5-min tracings in 131 pairs of adjacent large and small contacts. HFO rates per minute and mean event durations were compared between adjacent contacts. RESULTS A minimal but statistically significant advantage in ripple detection was found in a subgroup of large contacts. Otherwise, HFO rates and mean event durations were not statistically different between groups. CONCLUSION The size of clinical contacts within the studied range did not influence HFO detection in a clinically relevant manner. Larger contacts provide a minimal advantage for ripple detection. SIGNIFICANCE Our findings suggest that commercially available intracerebral electrodes with contacts between 0.2 and 5 mm(2) likely possess similar HFO detection abilities.
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Affiliation(s)
- C E Châtillon
- Department of Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Canada.
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