Publications by authors named "Martine Gavaret"

Objective: This study was undertaken to characterize the clinical and genetic features of patients with 22q11.2 deletion syndrome (22q11.2DS) and generalized epilepsy compared with 22q11.

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  • This study evaluates how treating vitamin D deficiency impacts seizure frequency in patients with drug-resistant epilepsy.
  • The trial involved 88 patients who were split into two groups: one received vitamin D3 supplements, while the other received a placebo over a specified period.
  • Results showed no significant difference in seizure frequency reduction after the initial 3 months, but notable improvements occurred later, including a 30% median reduction in seizures and better quality of life scores for those treated with vitamin D.
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  • Hypoxic ischemic brain injury (HIBI) affects brain areas crucial for the autonomic nervous system, and researchers aimed to find how heart rate variability (HRV) can predict neurological outcomes after cardiac arrest (CA).
  • The study included 199 patients who experienced CA, focusing on the correlation between HRV markers and the severity of brain injury, along with other prognostic indicators like EEG results and pupillary reflexes.
  • Findings revealed that patients with better neurological outcomes had significantly higher HRV values, particularly in very low and low frequencies, as well as in the LF/HF ratio, indicating that these HRV measurements may serve as useful predictors for recovery.
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A wealth of behavioral evidence indicate that sounds with increasing intensity (i.e. appear to be looming towards the listener) are processed with increased attentional and physiological resources compared to receding sounds.

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The spatial coding of tactile information is functionally essential for touch-based shape perception and motor control. However, the spatiotemporal dynamics of how tactile information is remapped from the somatotopic reference frame in the primary somatosensory cortex to the spatiotopic reference frame remains unclear. This study investigated how hand position in space or posture influences cortical somatosensory processing.

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Background: Right-sided vagus nerve stimulation (RS-VNS) is indicated when the procedure was deemed not technically feasible or too risky on the indicated left side.

Objective: The present study aims to systematically review the literature on RS-VNS, assessing its effectiveness and safety.

Methods: A systematic review following PRISMA guidelines was conducted: Pubmed/MEDLINE, The Cochrane Library, Scopus, Embase and Web of science databases were searched from inception to August 13th,2023.

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Objective: To investigate autonomic nervous system activity measured by brain-heart interactions in comatose patients after cardiac arrest in relation to the severity and prognosis of hypoxic-ischemic brain injury.

Methods: Strength and complexity of bidirectional interactions between EEG frequency bands (delta, theta, and alpha) and ECG heart rate variability frequency bands (low frequency, LF and high frequency, HF) were computed using a synthetic data generation model. Primary outcome was the severity of brain injury, assessed by (i) standardized qualitative EEG classification, (ii) somatosensory evoked potentials (N20), and (iii) neuron-specific enolase levels.

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Background And Objectives: Tumor-related epilepsy is a well-known symptom of glioblastoma. However, the particular characteristics of epileptic seizures related to glioblastoma, ()-wild-type is almost unexplored longitudinally during the whole course of the disease. We assessed tumor-related epilepsy and seizure control during tumor evolution and the prognostic significance of tumor-related epilepsy.

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  • EEG microstates are used to analyze cognitive functions in various psychiatric disorders, and their abnormalities may indicate issues related to mood, psychosis, and autism spectrum disorders.
  • The study will assess diverse groups, including those at high risk for psychosis and healthy controls, using a range of methods including EEG recordings and psychological evaluations over a year-long period.
  • A key focus is to determine if light hypnosis can positively alter unhealthy EEG microstate patterns observed in patients.
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Background: Electroencephalography (EEG) microstates translate resting-state temporal dynamics of neuronal networks throughout the brain and could constitute possible markers of psychiatric disorders. We tested the hypothesis of an increased imbalance between a predominant self-referential mode (microstate C) and a decreased attentional mode (microstate D) in psychosis, mood, and autism spectrum disorders.

Methods: We retrospectively included 135 subjects from an early psychosis outpatient unit, with available eyes-closed resting-state 19 electrodes EEG.

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Aims: Late auditory evoked potentials, and notably mismatch negativity (MMN) and P3 responses, can be used as part of the multimodal prognostic evaluation in post-anoxic disorders of consciousness (DOC). MMN response preferentially stems from the temporal cortex and the arcuate fasciculus. Situations with discrepant evaluations, for example MMN absent but P3 present, are frequent and difficult to interpret.

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Background: Mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE-HS) is usually associated with a poor response to antiseizure medications. We focused on MTLE-HS patients who were seizure free on medication to: (1) determine the clinical factors associated with seizure freedom and (2) develop a machine-learning classifier to better earlier identify those patients.

Methods: We performed a retrospective, multicentric study comparing 64 medically treated seizure-free MTLE-HS patients with 200 surgically treated drug-resistant MTLE-HS patients.

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About 80% of patients resuscitated from CA are comatose at ICU admission and nearly 50% of survivors are still unawake at 72 h. Predicting neurological outcome of these patients is important to provide correct information to patient's relatives, avoid disproportionate care in patients with irreversible hypoxic-ischemic brain injury (HIBI) and inappropriate withdrawal of care in patients with a possible favorable neurological recovery. ERC/ESICM 2021 algorithm allows a classification as "poor outcome likely" in 32%, the outcome remaining "indeterminate" in 68%.

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  • Scientists looked at brain activity in patients with severe brain injuries to see if they could predict if these patients would wake up.
  • They used special equipment to analyze brain signals and found a new way to measure brain connections that might help doctors make better decisions.
  • The study showed that this new method is linked to patients waking up and recovering, but it still needs to be tested more before being used widely.
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Background: To assess in comatose patients after cardiac arrest (CA) if amplitudes of two somatosensory evoked potentials (SSEP) responses, namely, N20-baseline (N20-b) and N20-P25, are predictive of neurological outcome.

Methods: Monocentric prospective study in a tertiary cardiac center between Nov 2019 and July-2021. All patients comatose at 72 h after CA with at least one SSEP recorded were included.

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Objectives: Describe the prevalence of acute cerebral dysfunction and assess the prognostic value of an early clinical and electroencephalography (EEG) assessment in ICU COVID-19 patients.

Design: Prospective observational study.

Setting: Two tertiary critical care units in Paris, France, between April and December 2020.

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  • The study looked at how the sound of a person's own name affects brain responses in patients who might not be fully aware of their surroundings.
  • Researchers examined data from 251 patients in French hospitals to see how different ways of saying names (like high or low pitch) influenced brain wave patterns called P300.
  • They found that names said in a higher pitch made the brain respond faster than names said in a lower pitch, which could help doctors understand how to better assess consciousness in patients.
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Background And Objectives: The association between levetiracetam and survival with isocitrate dehydrogenase () wild-type glioblastomas is controversial. We investigated whether the duration of levetiracetam use during the standard chemoradiation protocol affects overall survival (OS) of patients with wild-type glioblastoma.

Methods: In this observational single-institution cohort study (2010-2018), inclusion criteria were (1) age ≥18 years; (2) newly diagnosed supratentorial tumor; (3) histomolecular diagnosis of wild-type glioblastoma; and (4) standard chemoradiation protocol.

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On April 7, 1498, Charles VIII, King of France, attended a game of palm in the ditches of the Château d'Amboise. The 27-year-old King suddenly collapsed and became comatose. He laid down, almost on his own, on a straw mat that was hastily arranged, and he died 9 hours later.

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The definition of consciousness has been the subject of great interest for many scientists and philosophers. To better understand how evoked potentials may be identified as biomarkers of consciousness and recovery, the different theoretical models sustaining neural correlates of consciousness are reviewed. A multimodal approach can help to better predict clinical outcome in patients presenting with disorders of consciousness.

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. To measure the impact of skull-to-brain conductivity ratios on interictal spikes source localizations, using high resolution EEG (HR EEG). In previous studies, two ratios were mainly employed: 1/80 and 1/40.

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Background And Purpose: In acute stroke, preventing infarct growth until complete recanalization occurs is a promising approach as an adjunct to reperfusion therapies to reduce infarct size and improve outcome. In rodent models, cathodal transcranial direct current stimulation (C-tDCS) decreases peri-infarct depolarizations and reduces infarct volume. We hypothesized that C-tDCS would nonpharmacologically reduce infarct growth in hyperacute middle cerebral artery territory stroke patients receiving reperfusion therapy.

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