[Brain microstructural abnormalities assessed by diffusion kurtosis MRI in patients with focal temporal lobe epilepsy].

Objective: To study microstructural abnormalities in epileptogenic focus and in mirror region by diffusion kurtosis (DK) MRI in patients with focal temporal lobe epilepsy.

Material And Methods: The main group included 12 patients (mean age 35 [30.5; 39.

Déjà-vu sensation induced by cortical stimulation of the posterior cingulate cortex.

We report a case of a 19-year-old woman with drug-resistant focal epilepsy whose typical seizure semiology involved sensations of déjà-vu. She underwent intracranial stimulation, leading to déjà-vu upon stimulation of the posterior cingulate cortex (PCC). Most reports of induced déjà-vu and epilepsy-associated déjà-vu emphasize networks including temporal lobe, especially the rhinal cortices, as the generator of this phenomenon.

Combining three-phase EEG pattern and ipsilateral isolated eye deviation to predict seizure focus in the frontal interhemispheric fissure.

Objective: Identification of seizure focus on the interhemispheric fissure (IHF) is often challenging at the step of scalp video-EEG monitoring on preoperative evaluations. We previously reported ictal three-phase EEG patterns (3Ph-EEG) and isolated eye deviation (isolated ED) to side of the seizure focus during seizures, each of which is available for identifying the seizure focus for frontal IHF (F-IHF). This study aimed to evaluate the accuracy of predicting the F-IHF focus using a combination of 3Ph-EEG and isolated ED in patients with frontal lobe epilepsy and the accuracy of predicting lateralization of the F-IHF focus using the predominance of findings.

Chemogenetic silencing of the subiculum blocks acute chronic temporal lobe epilepsy.

Temporal lobe epilepsy (TLE) is the most common form of medically-intractable epilepsy. Subicular hyperexcitability is frequently observed with TLE, presumably caused by impaired inhibition of local excitatory neurons. Here, we evaluated the effectiveness of silencing subicular pyramidal neurons to treat a rodent model of TLE.

MRI-Negative Temporal Lobe Epilepsy: A Study of Brain Structure in Adults Using Surface-Based Morphological Features.

Background: This research aimed to delve into the cortical morphological transformations in patients with magnetic resonance imaging (MRI)-negative temporal lobe epilepsy (TLE-N), seeking to uncover the neuroimaging mechanisms behind these changes.

Methods: A total of 29 individuals diagnosed with TLE-N and 30 healthy control participants matched by age and sex were selected for the study. Using the surface-based morphometry (SBM) technique, the study analyzed the three-dimensional-T1-weighted MRI scans of the participants' brains.

Central expression and peripheral levels of MMP-9 and TIMP-1 in patients with temporal lobe epilepsy.

Purpose: Thirty percent of epilepsy patients are drug-resistant (DR) and, in adults, temporal lobe epilepsy (TLE) is the most common form of DR- epilepsy. Patients with TLE exhibit a neuroinflammatory response associated with blood-brain barrier dysfunction. In this context, the main aim of our study was to evaluate peripheral levels and central expression of MMP-9 and TIMP-1 in TLE patients and assess their association with drug resistance and inflammatory markers.

Anatomical considerations in selective amygdalohippocampectomy techniques for refractory temporal lobe epilepsy: a cadaveric study with emphasis on white matter tract anatomy.

Purpose: Mesial temporal lobe epilepsy is a common form of focal drug resistant epilepsy in adults. Various mesial temporal lobe structures are integral in the genesis of temporal seizures and the hippocampal sclerosis is the primary neuropathological finding in these cases. Surgical treatment is considered the preferred management.

Kainate-Induced Reorganization the Dentate Gyrus of the Hippocampus Is Accompanied by Activation of Mitochondrial Fission in the Granular Layer Neurons.

The reorganization of the dentate gyrus of the hippocampus and changes in mitochondrial fission were evaluated using the kainate model of temporal lobe epilepsy. In 28 days after administration of 0.5 μg kainic acid, disturbances in the distribution of neuronal precursors in the subgranular zone of the hippocampus, thickening of the granular layer, and an increase in the content of synaptophysin in the molecular layer were detected.

Executive functions disorders in children with frontal and temporal epilepsy.

Introduction: Children with focal epilepsy often present with executive functions (EFs) deficits. EFs deficits can contribute to adaptive challenges and have a negative impact on academic achievement. The purpose of this study was to investigate the EFs profiles of children diagnosed with frontal lobe epilepsy or temporal lobe epilepsy.

Distinguishing seizures in autoimmune limbic encephalitis from mesial temporal lobe epilepsy with hippocampal sclerosis: Clues of a temporal plus network.

Objective: Diagnosing autoimmune limbic encephalitis (ALE) in adults with new-onset seizures can be challenging, especially when seizures represent the predominant manifestation and MRI findings are not straightforward. By comparison with mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE-HS), this study aimed to identify ictal electro-clinical features that might help clinicians recognize ALE-related seizures.

Methods: This retrospective, multi-centre study analysed the ictal semiology and EEG correlate of 116 video-EEG-captured seizures in 40 ALE patients and 45 ones recorded in 21 MTLE-HS subjects.

Activation of hypoactive parvalbumin-positive fast-spiking interneurons restores dentate inhibition to reduce electrographic seizures in the mouse intrahippocampal kainate model of temporal lobe epilepsy.

Parvalbumin-positive (PV+) GABAergic interneurons in the dentate gyrus provide powerful perisomatic inhibition of dentate granule cells (DGCs) to prevent overexcitation and maintain the stability of dentate gyrus circuits. Most dentate PV+ interneurons survive status epilepticus, but surviving PV+ interneuron mediated inhibition is compromised in the dentate gyrus shortly after status epilepticus, contributing to epileptogenesis in temporal lobe epilepsy. It is uncertain whether the impaired activity of dentate PV+ interneurons recovers at later times or if it continues for months following status epilepticus.

Epilepsy-surgery for fronto-basal lesions: Management, outcome, and review of literature.

Background: In this study, we isolated a cohort of patients who have refractory epilepsy who underwent surgery with frontobasal focus. This work aimed to develop prognostic factors associated with a better seizure outcome and identify risk factors determining postoperative morbidity.

Methods: We identified all patients with frontobasal epilepsy who underwent surgery due to refractory epilepsy at the University Hospital Bonn over 22 years.

Personality psychopathology in temporal lobe epilepsy: An Arabian study.

Objectives: Previous research has linked epilepsy of the temporal lobe (TLE) with comorbidities of psychiatric nature, yet few studies have investigated personality psychopathology in patients with TLE. This is the first study on the topic in the Arab world and the first study using the Personality Inventory for DSM-5-Brief From (PID-5-BF). Thus, this study, which is cross-sectional by nature, aims to explore the potential relationship between TLE and personality psychopathology.

A universal method for seizure onset zone localization in focal epilepsy using standard deviation of spike amplitude.

Background: Precisely localizing the seizure onset zone (SOZ) is critical for focal epilepsy surgery. Existing methods mainly focus on high-frequency activities in stereo-electroencephalography, but often fail when seizures are not driven by high-frequency activities. Recognized as biomarkers of epileptic seizures, ictal spikes in SOZ induce epileptiform discharges in other brain regions.

Lateralization of memory function in temporal lobe epilepsy using scene memory fMRI.

Functional magnetic resonance imaging (fMRI) offers an alternative to the traditional Wada test for presurgical language and memory lateralization that carries almost no risk. However, fMRI lateralization of episodic memory remains challenging because the hippocampus, which is fundamental to episodic memory, is smaller, more prone to susceptibility artifact, and harder to functionally modulate than language regions. We previously showed that a complex scene memory task can lateralize memory function in the mesial temporal lobe.

Compartment-specific small non-coding RNA changes and nucleolar defects in human mesial temporal lobe epilepsy.

Mesial temporal lobe epilepsy (mTLE) is a debilitating disease characterized by recurrent seizures originating from temporal lobe structures such as the hippocampus. The pathogenic mechanisms underlying mTLE are incompletely understood but include changes in the expression of non-coding RNAs in affected brain regions. Previous work indicates that some of these changes may be selective to specific sub-cellular compartments, but the full extent of these changes and how these sub-cellular compartments themselves are affected remains largely unknown.