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Temporal Lobe Epilepsy

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https://www.readbyqxmd.com/read/27918961/the-promise-of-subtraction-ictal-spect-co-registered-to-mri-for-improved-seizure-localization-in-pediatric-epilepsies-affecting-factors-and-relationship-to-the-surgical-outcome
#1
Catherine Stamoulis, Nishant Verma, Himanshu Kaulas, Jonathan J Halford, Frank H Duffy, Phillip L Pearl, S Ted Treves
OBJECTIVE: Ictal SPECT is promising for accurate non-invasive localization of the epileptogenic brain tissue in focal epilepsies. However, high quality ictal scans require meticulous attention to the seizure onset. In a relatively large cohort of pediatric patients, this study investigated the impact of the timing of radiotracer injection, MRI findings and seizure characteristics on ictal SPECT localizations, and the relationship between concordance of ictal SPECT, scalp EEG and resected area with seizure freedom following epilepsy surgery...
November 30, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27917853/treatment-of-posttraumatic-epilepsy-with-new-generation-antiepileptic-drugs-aeds-our-experience
#2
Lidija Šapina, Marija Ratković
Aim To investigate influence of therapy with new generation antiepileptic drugs (AEDs) in fastening of posttraumatic epilepsy (PTE) remission comparing to therapy with standard AEDs, as well as the time to remission in the presence of psychiatric comorbidities. Methods The study was conducted during the 1988-2008 period and included 113 patients (47 females and 67 males) with PTE and 113 patients (93 females and 20 males) suffering from complex partial seizures (CPS) of temporal lobe origin. In both patient groups, epileptic seizure phenotype, brain magnetic resonance imaging (1...
February 1, 2017: Medicinski Glasnik
https://www.readbyqxmd.com/read/27913320/the-concept-of-effective-inflow-application-to-interictal-localization-of-the-epileptogenic-focus-from-ieeg
#3
Ioannis Vlachos, Balu Krishnan, David Treiman, Konstantinos Tsakalis, Dimitris Kugiumtzis, Leon Iassemidis
GOAL: Accurate determination of the epileptogenic focus is of paramount diagnostic and therapeutic importance in epilepsy. The current gold standard for focus localization is from ictal (seizure) onset and thus requires the occurrence and recording of multiple typical seizures of a patient. Localization of the focus from seizure-free (interictal) periods remains a challenging problem, especially in the absence of interictal epileptiform activity. METHODS: By exploring the concept of effective inflow, we developed a focus localization algorithm (FLA) based on directed connectivity between brain sites...
November 29, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/27907826/extent-of-mossy-fiber-sprouting-in-patients-with-mesiotemporal-lobe-epilepsy-correlates-with-neuronal-cell-loss-and-granule-cell-dispersion
#4
Barbara Schmeiser, Josef Zentner, Marco Prinz, Armin Brandt, Thomas M Freiman
OBJECTIVE: The most frequent finding in temporal lobe epilepsy is hippocampal sclerosis, characterized by selective cell loss of hippocampal subregions CA1 and CA4 as well as mossy fiber sprouting (MFS) towards the supragranular region and granule cell dispersion. Although selective cell loss is well described, its impact on mossy fiber sprouting and granule cell dispersion remains unclear. MATERIALS AND METHODS: In a single center series, we examined 319 human hippocampal specimens, collected in a 15-years period...
November 22, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27905510/remarkable-alterations-of-nav1-6-in-reactive-astrogliosis-during-epileptogenesis
#5
Hongyan Zhu, Yuxiao Zhao, Hao Wu, Nan Jiang, Ziyi Wang, Weide Lin, Jiahui Jin, Yonghua Ji
Voltage-gated sodium channels (VGSCs) play a vital role in controlling neuronal excitability. Nav1.6 is the most abundantly expressed VGSCs subtype in the adult central nervous system and has been found to contribute to facilitate the hyperexcitability of neurons after electrical induction of status epilepticus (SE). To clarify the exact expression patterns of Nav1.6 during epileptogenesis, we examined the expression of Nav1.6 at protein and mRNA levels in two distinct animal models of temporal lobe epilepsy (TLE) including a post-SE model induced by kainic acid (KA) intrahippocampal injection and a kindling model evoked by pentylenetetrazole (PTZ)...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27903764/epilepsy-and-music-practical-notes
#6
REVIEW
M Maguire
Music processing occurs via a complex network of activity far beyond the auditory cortices. This network may become sensitised to music or may be recruited as part of a temporal lobe seizure, manifesting as either musicogenic epilepsy or ictal musical phenomena. The idea that sound waves may directly affect brain waves has led researchers to explore music as therapy for epilepsy. There is limited and low quality evidence of an antiepileptic effect with the Mozart Sonata K.448. We do not have a pathophysiological explanation for the apparent dichotomous effect of music on seizures...
November 30, 2016: Practical Neurology
https://www.readbyqxmd.com/read/27903016/predicting-tissue-breaking-strengths-in-the-epileptic-brain-with-t2-relaxometry-application-of-pulsed-water-jet-dissection-system-for-epilepsy-surgery
#7
Yoko Takahashi, Masaki Iwasaki, Atsuhiro Nakagawa, Shiho Sato, Nobukazu Nakasato, Teiji Tominaga
Background The piezo actuator-driven pulsed water jet (ADPJ) system is a novel surgical instrument that enables dissection of tissue without thermal damage. Using the ADPJ system in epilepsy surgery requires prediction of the tissue breaking strength of the epileptic brain. The aim of this study was to elucidate whether magnetic resonance imaging T2 relaxometry could predict the breaking strength. Methods A total of 12 patients with drug-resistant temporal lobe epilepsy who received surgical treatment were included in the study...
November 30, 2016: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/27897304/-the-role-of-diffusion-tensor-imaging-in-the-pre-surgical-study-of-temporal-lobe-epilepsy
#8
M A Garcia-Pallero, C V Torres, R Manzanares-Soler, E Camara, R G Sola
INTRODUCTION: Diffusion tensor imaging (DTI) is a non-invasive technique that can be used to assess the integrity of the white matter in the brain. AIMS: To investigate the usefulness of DTI in patients with temporal lobe epilepsy (TLE) and to observe its relationship with lateralisation of the epileptogenic focus in these patients. PATIENTS AND METHODS: We analysed 11 patients diagnosed with TLE in accordance with the pre-surgical protocol of our epilepsy unit, and who were seizure-free two years after performing a temporal lobectomy plus amygdalohippocampectomy (Spencer technique)...
December 16, 2016: Revista de Neurologia
https://www.readbyqxmd.com/read/27896315/altered-oscillatory-dynamics-of-ca1-parvalbumin-basket-cells-during-theta-gamma-rhythmopathies-of-temporal-lobe-epilepsy
#9
Diego Lopez-Pigozzi, François Laurent, Jorge R Brotons-Mas, Mario Valderrama, Manuel Valero, Ivan Fernandez-Lamo, Elena Cid, Daniel Gomez-Dominguez, Beatriz Gal, Liset Menendez de la Prida
Recent reports in human demonstrate a role of theta-gamma coupling in memory for spatial episodes and a lack of coupling in people experiencing temporal lobe epilepsy, but the mechanisms are unknown. Using multisite silicon probe recordings of epileptic rats engaged in episodic-like object recognition tasks, we sought to evaluate the role of theta-gamma coupling in the absence of epileptiform activities. Our data reveal a specific association between theta-gamma (30-60 Hz) coupling at the proximal stratum radiatum of CA1 and spatial memory deficits...
November 2016: ENeuro
https://www.readbyqxmd.com/read/27896067/relationship-between-high-frequency-oscillations-and-spikes-in-a-case-of-temporal-lobe-epilepsy
#10
Vishwanath Sagi, M Steven Evans
OBJECTIVE: The aim of this case report was to study the relationship between high-frequency oscillations (HFOs), spikes, and seizures in a patient with temporal lobe epilepsy. INTRODUCTION: During intracranial electroencephalography (EEG), HFOs are thought to be a marker for the seizure onset zone (SOZ). High-frequency oscillations are classified into ripples with frequencies of 70-200 Hz and fast ripples with frequencies of 200-500 Hz. Although HFOs are thought to be a marker for the SOZ, their relationship to spikes has not been studied in detail, especially within the SOZ...
2016: Epilepsy & Behavior Case Reports
https://www.readbyqxmd.com/read/27891434/abdominal-epilepsy-in-an-adult-a-diagnosis-often-missed
#11
Devavrat G Harshe, Sneha D Harshe, Gurudas R Harshe, Gayatri G Harshe
Abdominal Epilepsy (AE) is a variant of temporal lobe epilepsy and is commonly seen in pediatric age group. There are however, multiple reports of abdominal epilepsy in adolescents and even in adults. Chronic and recurrent gastrointestinal symptoms with one or more neuropsychiatric manifestations are often the presenting picture for a patient with AE. Such patients therefore, are more likely to consult a general practioner, a physician, a surgeon or a gastroenterologist than consulting a psychiatrist or a neurologist...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27891419/evaluation-of-hospitalized-intractable-epileptic-children-with-spect-scan-in-ahvaz-south-west-of-iran
#12
Ali Akbar Momen, Faramarz Ahmadi, Arash Malekian, Hannaneh Davoodzadeh, Hossein Kabirinia
INTRODUCTION: Seizures are the most frequent neurologic disorder seen in childhood. Epilepsy is a group of disorders that includes an abnormally increased susceptibility to seizures. AIM: To examine the effectiveness of SPECT (Single Photon Emission Computerized Tomography) in detecting seizure foci in 21 Iranian children who had medically refractory epilepsy. MATERIALS AND METHODS: Children between 2 to 15 years of age with uncontrolled seizures were investigated using SPECT scan as a standardized protocol...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27889242/benign-mesial-temporal-lobe-epilepsy-a-clinical-cohort-and-literature-review
#13
REVIEW
Amal AlQassmi, Jorge G Burneo, Richard S McLachlan, Seyed M Mirsattari
OBJECTIVE: We present a single-center retrospective study of benign mesial temporal lobe epilepsy (bMTLE) between 1995 and 2014. METHODS: Hospital records and clinic charts were reviewed. The clinical, Eelectroencephalographic (EEG), imaging features, and response to treatment with antiepileptic drugs (AEDs) were documented. Patients were included in this study if they were seizure-free for a minimum of 24months with or without an AED. RESULTS: Twenty-seven patients were identified...
November 23, 2016: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/27888520/identifying-the-epileptogenic-zone-in-interictal-resting-state-meg-source-space-networks
#14
Ida A Nissen, Cornelis J Stam, Jaap C Reijneveld, Ilse E C W van Straaten, Eef J Hendriks, Johannes C Baayen, Philip C De Witt Hamer, Sander Idema, Arjan Hillebrand
OBJECTIVE: In one third of patients, seizures remain after epilepsy surgery, meaning that improved preoperative evaluation methods are needed to identify the epileptogenic zone. A potential framework for such a method is network theory, as it can be applied to noninvasive recordings, even in the absence of epileptiform activity. Our aim was to identify the epileptogenic zone on the basis of hub status of local brain areas in interictal magnetoencephalography (MEG) networks. METHODS: Preoperative eyes-closed resting-state MEG recordings were retrospectively analyzed in 22 patients with refractory epilepsy, of whom 14 were seizure-free 1 year after surgery...
November 26, 2016: Epilepsia
https://www.readbyqxmd.com/read/27888509/functional-properties-of-granule-cells-with-hilar-basal-dendrites-in-the-epileptic-dentate-gyrus
#15
Tony Kelly, Heinz Beck
OBJECTIVE: The maturation of adult-born granule cells and their functional integration into the network is thought to play a key role in the proper functioning of the dentate gyrus. In temporal lobe epilepsy, adult-born granule cells in the dentate gyrus develop abnormally and possess a hilar basal dendrite (HBD). Although morphological studies have shown that these HBDs have synapses, little is known about the functional properties of these HBDs or the intrinsic and network properties of the granule cells that possess these aberrant dendrites...
November 26, 2016: Epilepsia
https://www.readbyqxmd.com/read/27888083/clinical-and-imaging-evaluation-of-the-transuncus-selective-amygdalo-hippocampectomy
#16
Enrico Ghizoni, Roger Matias, Stefan Lieber, Brunno Machado de Campos, Clarissa Lin Yasuda, João Paulo Sant Ana Santos de Souza, Pamela Castro Pereira, Augusto Amato, Andrei Fernandes Joaquim, Tátila Martins Lopes, Helder Tedeschi, Fernando Cendes
BACKGROUND: Various reports described the transuncus approach (TU) as a selective route to the amygdala and hippocampus, but this approach has not yet being submitted to a solid post operative imaging analysis. The objective of this study was to evaluate the anatomy, surgical technique, postoperative imaging analysis and outcome in a series of temporal lobe epilepsy (TLE) patients who underwent to selective amigdalo-hippocampectomy (SHA) via TU. METHODS: This is a prospective study of 25 consecutive patients who underwent to selective amigdalo-hippocampectomy through TU...
November 22, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27886629/transient-epileptic-amnesia-over-twenty-years-long-term-follow-up-of-a-case-series-with-three-detailed-reports
#17
Sharon A Savage, Christopher R Butler, John R Hodges, Adam Z Zeman
PURPOSE: Transient Epileptic Amnesia (TEA) is a form of adult onset temporal lobe epilepsy characterised by ictal amnesia. The amnesic seizures are often accompanied by interical memory disturbance, involving autobiographical amnesia and accelerated long-term forgetting. Short-term follow-up studies suggest a relatively stable cognitive profile once treated, but recent case reports raise concerns regarding the risk of developing Alzheimer's disease (AD). The current study reports clinical and cognitive outcome in TEA patients over a 20-year period...
November 14, 2016: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/27882298/high-frequency-oscillations-and-high-frequency-functional-network-characteristics-in-the-intraoperative-electrocorticogram-in-epilepsy
#18
W J E M Zweiphenning, M A van 't Klooster, E van Diessen, N E C van Klink, G J M Huiskamp, T A Gebbink, F S S Leijten, P H Gosselaar, W M Otte, C J Stam, K P J Braun, G J M Zijlmans
OBJECTIVE: High frequency oscillations (HFOs; > 80 Hz), especially fast ripples (FRs, 250-500 Hz), are novel biomarkers for epileptogenic tissue. The pathophysiology suggests enhanced functional connectivity within FR generating tissue. Our aim was to determine the relation between brain areas showing FRs and 'baseline' functional connectivity within EEG networks, especially in the high frequency bands. METHODS: We marked FRs, ripples (80-250 Hz) and spikes in the electrocorticogram of 14 patients with refractory temporal lobe epilepsy...
2016: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27882297/disrupted-functional-connectivity-affects-resting-state-based-language-lateralization
#19
Alex Teghipco, Ali Hussain, Madalina E Tivarus
Pre-operative assessment of language localization and lateralization is critical to preserving brain function after lesion or epileptogenic tissue resection. Task fMRI (t-fMRI) has been extensively and reliably used to this end, but resting state fMRI (rs-fMRI) is emerging as an alternative pre-operative brain mapping method that is independent of a patient's ability to comply with a task. We sought to evaluate if language lateralization obtained from rs-fMRI can replace standard assessment using t-fMRI. In a group of 43 patients scheduled for pre-operative fMRI brain mapping and 17 healthy controls, we found that existing methods of determining rs-fMRI lateralization by considering interhemispheric and intrahemispheric functional connectivity are inadequate compared to t-fMRI when applied to the language network...
2016: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27882296/white-matter-abnormalities-at-a-regional-and-voxel-level-in-focal-and-generalized-epilepsy-a-systematic-review-and-meta-analysis
#20
Geertruida Slinger, Michel R T Sinke, Kees P J Braun, Willem M Otte
OBJECTIVE: Since the introduction of diffusion tensor imaging, white matter abnormalities in epilepsy have been studied extensively. However, the affected areas reported, the extent of abnormalities and the association with relevant clinical parameters are highly variable. We aimed to obtain a more consistent estimate of white matter abnormalities and their association with clinical parameters in different epilepsy types. METHODS: We systematically searched for differences in white matter fractional anisotropy and mean diffusivity, at regional and voxel level, between people with epilepsy and healthy controls...
2016: NeuroImage: Clinical
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