📇 Rhumatologue · NANCY CEDEX · (54) · Hospitalier

M OLIVIER ARON

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5 articles scientifiques publiés — formation continue solide
Délais de RDV courts dans la région
146.3 rhumatos / 100 000 hab. — département bien doté

Rhumatologue

📍 NANCY CEDEX (54)HospitalierRPPS 10100652469

Publications actives

2ans d'exercice (thèse 2024)·22 publications sur 5 ans

📊 Reconnaissance scientifique : 7/100📝 29 articles publiés🇫🇷 Publications académiques françaises (8)

✨ Génération du profil synthétique IA en cours…

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Top publications · les plus citées

Language Mapping Using Stereo Electroencephalography: A Review and Expert Opinion

Frontiers in human neuroscience · 2021

📚 28 citations🎯 RCR 2.83Top 17% NIH🔓 Open Access📄 PDF gratuit ↗

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Stereo-electroencephalography (sEEG) is a method that uses stereotactically implanted depth electrodes for extra-operative mapping of epileptogenic and functional networks. sEEG derived functional mapping is achieved using electrical cortical stimulations (ECS) that are currently the gold standard for delineating eloquent cortex. As this stands true especially for primary cortices (e.g., visual, sensitive, motor, etc.), ECS applied to higher order brain areas determine more subtle behavioral responses. While anterior and posterior language areas in the dorsal language stream seem to share characteristics with primary cortices, basal temporal language area (BTLA) in the ventral temporal cortex (VTC) behaves as a highly associative cortex. After a short introduction and considerations about methodological aspects of ECS using sEEG, we review the sEEG language mapping literature in this perspective. We first establish the validity of this technique to mapindispensablelanguage cortices in the dorsal language stream. Second, we highlight the contrast between the growing empirical ECS experience and the lack of understanding regarding the fundamental mechanisms underlying ECS behavioral effects, especially concerning the dispensable language cortex in the VTC. Evidences for considering network architecture as determinant for ECS behavioral response complexities are discussed. Further, we address the importance of designing new research in network organization of language as this could enhance ECS ability to map interindividual variability, pathology driven reorganization, and ultimately identify network resilience markers in order to better predict post-operative language deficit. Finally, based on a whole body of available studies, we believe there is strong evidence to consider sEEG as a valid, safe and reliable method for defining eloquent language cortices although there have been no proper comparisons between surgical resections with or without extra-operative or intra-operative language mapping.

Anticipatory anxiety of seizures is associated with ictal emotional distress and amygdala onset seizures

Epilepsia · 2022

📚 20 citations🎯 RCR 2.76Top 18% NIH

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AbstractObjectiveAnxiety disorders are a frequent psychiatric condition in patients with epilepsy. Anticipatory anxiety of seizures (AAS) is described as a daily persistent fear or excessive worry of having a seizure. AAS seems to be related to “subjective ictal anxiety” reported by patients. The current study aimed to assess the association between objective ictal features and the presence of AAS.MethodsNinety‐one patients with drug‐resistant focal epilepsy underwent a standardized psychiatric assessment, specific for epilepsy, and presurgical long‐term video‐electroencephalography (EEG) or stereo‐EEG (SEEG). We compared seizure semiology and epilepsy features of patients with AAS (n = 41) to those of patients without AAS (n = 50). We analyzed emotional and motor behavior ictal signs as well as ictal consciousness. We further assessed amygdala ictal involvement in seizures recorded with SEEG (n = 28).ResultsAAS was significantly associated with the presence of ictal emotional distress; negative emotional behavior (p < .01) and negative emotion were explicitly reported to the examiner during recording (p = .015), regardless of the ictal level of consciousness. Among the patients recorded with SEEG, we found a significant involvement of amygdala within the seizure onset zone (p < .01) for patients with AAS.SignificanceHigher risk of developing AAS is associated with seizures expressing negative emotional symptoms, independently of ictal consciousness level. Persistent interictal fear of seizures might be viewed as the consequence of a reinforcement of the emotional networks secondary to amygdala involvement in seizures of temporal origin. Physicians should screen for AAS not only to assess the impact of epilepsy on daily life, but also as an interictal biomarker of ictal semiology and emotional network involvement at seizure onset.

Epilepsy in Early Onset Alzheimer's Disease

Journal of Alzheimer's disease : JAD · 2022

📚 20 citations🎯 RCR 2.17Top 24% NIH🩺 Clinique

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Background: Epilepsy seems to be an important comorbidity in patients with early onset Alzheimer’s disease (EOAD). Currently, seizures are still underestimated in this population. However, seizures may interact with AD evolution with possible acceleration of cognitive decline. Objective: To better define the epileptic disorders observed in patients with EOAD. Methods: All patients diagnosed as EOAD in our hospital between 2013 and 2019 with positive CSF biomarkers for AD were selected. The usual follow-up was extended with a 3-h EEG and a consultation with an epilepsy expert. Information on epilepsy and AD were collected and analyzed. Results: Among the 25 included patients, 10 (40%) were classified as epileptic. Seizure types were tonic-clonic (25%), typical temporal seizures (25%), myoclonus (25%), focal extra-temporal seizures (8%), and other seizure types (17%). AD-E patients had a significant lower MMSE (15.3±8.4 AD-E versus 22.1±5.1 AD-NE, p = 0.036) and a lower autonomy (IADL 4.1±2.7 AD-E versus 6.4±1.9 AD-NE, p = 0.046) at AD diagnosis with comparable ages between AD-E and AD-NE. Epileptic patients seemed to present a faster cognitive decline ([ΔMMSE per year 1.7±1.3 AD-E versus 0.9±1.4 AD-NE; p = 0.09). All patients with severe cognitive impairment (MMSE ≤ 10) had an epileptic comorbidity. Conclusion: Epilepsy is a frequent comorbidity in EOAD patients, with a percentage of 40%in our study. This comorbidity may be associated with a severe form of EOAD. The role of epilepsy in the acceleration of cognitive decline and the positive impact of antiepileptic drugs on cognition need further research.

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M OLIVIER ARON

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Thèses universitaires

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Publications académiques en France

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Top publications · les plus citées

Publications scientifiques (5) — classées par pathologie

Revue générale2

Transversal2

Santé mentale / fatigue1

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