keyword
MENU ▼
Read by QxMD icon Read
search

Neocortical epilepsy

keyword
https://www.readbyqxmd.com/read/28412559/interictal-ripples-nested-in-epileptiform-discharge-help-to-identify-the-epileptogenic-zone-in-neocortical-epilepsy
#1
Shuang Wang, Norman K So, Bo Jin, Irene Z Wang, Juan C Bulacio, Rei Enatsu, Shenyi Dai, Zhong Chen, Jorge Gonzalez-Martinez, Imad M Najm
OBJECTIVE: This study aimed to identify the subtype of interictal ripples that help delineate the epileptogenic zone in neocortical epilepsy. METHODS: Totally 25 patients with focal neocortical epilepsy who had invasive electroencephalography (EEG) evaluation and subsequent surgery were included. They were followed up for at least 2years. Interictal ripples (80-250Hz) and fast ripples (250-500Hz) during slow-wave sleep were identified. Neocortical ripples were defined as type I ripples when they were superimposed on epileptiform discharges, and as type II ripples when they occurred independently...
March 25, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28387951/brain-responsive-neurostimulation-in-patients-with-medically-intractable-seizures-arising-from-eloquent-and-other-neocortical-areas
#2
Barbara C Jobst, Ritu Kapur, Gregory L Barkley, Carl W Bazil, Michel J Berg, Gregory K Bergey, Jane G Boggs, Sydney S Cash, Andrew J Cole, Michael S Duchowny, Robert B Duckrow, Jonathan C Edwards, Stephan Eisenschenk, A James Fessler, Nathan B Fountain, Eric B Geller, Alica M Goldman, Robert R Goodman, Robert E Gross, Ryder P Gwinn, Christianne Heck, Aamr A Herekar, Lawrence J Hirsch, David King-Stephens, Douglas R Labar, W R Marsh, Kimford J Meador, Ian Miller, Eli M Mizrahi, Anthony M Murro, Dileep R Nair, Katherine H Noe, Piotr W Olejniczak, Yong D Park, Paul Rutecki, Vicenta Salanova, Raj D Sheth, Christopher Skidmore, Michael C Smith, David C Spencer, Shraddha Srinivasan, William Tatum, Paul Van Ness, David G Vossler, Robert E Wharen, Gregory A Worrell, Daniel Yoshor, Richard S Zimmerman, Tara L Skarpaas, Martha J Morrell
OBJECTIVE: Evaluate the seizure-reduction response and safety of brain-responsive stimulation in adults with medically intractable partial-onset seizures of neocortical origin. METHODS: Patients with partial seizures of neocortical origin were identified from prospective clinical trials of a brain-responsive neurostimulator (RNS System, NeuroPace). The seizure reduction over years 2-6 postimplantation was calculated by assessing the seizure frequency compared to a preimplantation baseline...
April 7, 2017: Epilepsia
https://www.readbyqxmd.com/read/28380659/tailoring-epilepsy-surgery-with-fast-ripples-in-the-intra-operative-electrocorticogram
#3
M A van 't Klooster, N E C van Klink, W J E M Zweiphenning, F S S Leijten, R Zelmann, C H Ferrier, P C van Rijen, W M Otte, K P J Braun, G J M Huiskamp, M Zijlmans
OBJECTIVE: Intra-operative electrocorticography (ECoG) can be used to delineate the resection area in epilepsy surgery. High frequency oscillations (HFOs, 80-500Hz) seem better biomarkers for epileptogenic tissue than spikes. We studied how HFOs and spikes in combined pre- and post-resection ECoG predict surgical outcome in different tailoring approaches. METHODS: We, retrospectively, marked HFOs, divided into fast ripples (FRs, 250-500Hz) and ripples (80-250Hz), and spikes in pre- and post-resection ECoG sampled at 2048 Hz in people with refractory focal epilepsy...
April 5, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28372497/astrocyte-mediated-inflammation-in-cortical-spreading-depression
#4
Amir Ghaemi, Leila Alizadeh, Shahnaz Babaei, Maryam Jafarian, Maryam Khaleghi Ghadiri, Sven G Meuth, Stjepana Kovac, Ali Gorji
Background Cortical spreading depression (CSD) related diseases such as migraine, cerebrovascular diseases, and epilepsy have been associated with reactive astrocytosis, yet the mechanisms of these tissue changes remain unclear. CSD-induced inflammatory response has been proposed to play a role in some neurological disorders and thus may also contribute to reactive astrocytosis. Methods Using ex vivo brain slices and in vitro astrocytic cultures, we aimed to characterize CSD related changes in astrocytes and markers of inflammation by immunocyto- and immunohistochemistry...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28353003/coexistence-of-meningoencephalocele-and-hippocampal-sclerosis-a-new-type-of-dual-pathology
#5
Matteo Martinoni, Gianluca Marucci, Gabriele Gagliardini, Paolo Tinuper, Roberto Michelucci, Marco Giulioni
Both temporal lobe meningoencephalocele (TE) and hippocampal sclerosis (HS) are causes of drug-resistant temporal lobe epilepsy. Spontaneous TE constitutes a rare but well-known and increasingly recognised cause of refractory epilepsy. It is well known that HS may be associated with another neocortical lesion (dual pathology). Here we report for the first time a new type of dual pathology; namely, the coexistence of temporal pole meningoencephalocele and HS.
May 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28303256/recurring-functional-interactions-predict-network-architecture-of-interictal-and-ictal-states-in-neocortical-epilepsy
#6
Ankit N Khambhati, Danielle S Bassett, Brian S Oommen, Stephanie H Chen, Timothy H Lucas, Kathryn A Davis, Brian Litt
Human epilepsy patients suffer from spontaneous seizures, which originate in brain regions that also subserve normal function. Prior studies demonstrate focal, neocortical epilepsy is associated with dysfunction, several hours before seizures. How does the epileptic network perpetuate dysfunction during baseline periods? To address this question, we developed an unsupervised machine learning technique to disentangle patterns of functional interactions between brain regions, or subgraphs, from dynamic functional networks constructed from approximately 100 h of intracranial recordings in each of 22 neocortical epilepsy patients...
January 2017: ENeuro
https://www.readbyqxmd.com/read/28269702/predicting-seizures-from-local-field-potentials-recorded-via-intracortical-microelectrode-arrays
#7
Mehdi Aghagolzadeh, Leigh R Hochberg, Sydney S Cash, Wilson Truccolo
The need for new therapeutic interventions to treat pharmacologically resistant focal epileptic seizures has led recently to the development of closed-loop systems for seizure control. Once a seizure is predicted/detected by the system, electrical stimulation is delivered to prevent seizure initiation or spread. So far, seizure prediction/detection has been limited to tracking non-invasive electroencephalogram (EEG) or intracranial EEG (iEEG) signals. Here, we examine seizure prediction based on local field potentials (LFPs) from a small neocortical patch recorded via a 10×10 microelectrode array implanted in a patient with focal seizures...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28235654/is-burned-out-hippocampus-syndrome-a-distinct-electro-clinical-variant-of-mtle-hs-syndrome
#8
Pradeep P Nair, Ramshekhar N Menon, Ashalatha Radhakrishnan, Ajit Cherian, Mathew Abraham, George Vilanilam, C Kesavadas, Bejoy Thomas, Aley Alexander, Sanjeev V Thomas
AIM: To study the clinical, electrophysiological and imaging characteristics of patients with unilateral mesial temporal lobe epilepsy (MTLE) with contralateral ictal onset on scalp EEG, viz. 'burned-out hippocampus' syndrome (MTLE-BHS). METHODS: MTLE-BHS was defined as TLE with unilateral hippocampal sclerosis (HS) without any dual pathology on MRI and contralateral ictal onset on scalp EEG, unlike in classical hippocampal sclerosis (HS). Consecutive "MTLE-BHS" patients evaluated at our Centre for Comprehensive Epilepsy Care from January 2005 to July 2014 were studied...
February 21, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28227963/predicting-seizures-from-local-field-potentials-recorded-via-intracortical-microelectrode-arrays
#9
Mehdi Aghagolzadeh, Leigh R Hochberg, Sydney S Cash, Wilson Truccolo, Mehdi Aghagolzadeh, Leigh R Hochberg, Sydney S Cash, Wilson Truccolo, Sydney S Cash, Wilson Truccolo, Mehdi Aghagolzadeh, Leigh R Hochberg
The need for new therapeutic interventions to treat pharmacologically resistant focal epileptic seizures has led recently to the development of closed-loop systems for seizure control. Once a seizure is predicted/detected by the system, electrical stimulation is delivered to prevent seizure initiation or spread. So far, seizure prediction/detection has been limited to tracking non-invasive electroencephalogram (EEG) or intracranial EEG (iEEG) signals. Here, we examine seizure prediction based on local field potentials (LFPs) from a small neocortical patch recorded via a 10×10 microelectrode array implanted in a patient with focal seizures...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28202379/comprehensive-preoperative-work-up-and-surgical-treatment-of-low-grade-tumor-benign-lesion-related-temporal-lobe-epilepsy
#10
Rui Feng, Jie Hu, Jinsong Wu, Liqin Lang, Chengxin Ma, Shize Jiang, Bing Sun, Xin Gu, Li Pan
OBJECTIVE: Generally low-grade tumor/benign lesion related temporal lobe epilepsy (LGT/BL-TLE) is considered easier to treat and has better prognosis when compared to non-lesional TLE. However, multiple disputes exist in surgical management of this epilepsy entity. This study aims to discuss comprehensive preoperative work-up, surgical strategies and outcome of it. METHODS: A retrospective review of sixty LGT/BL-TLE cases which underwent comprehensive preoperative work-up and then resective surgeries was conducted...
May 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28193882/neuronal-hyperexcitability-in-a-mouse-model-of-scn8a-epileptic-encephalopathy
#11
Luis F Lopez-Santiago, Yukun Yuan, Jacy L Wagnon, Jacob M Hull, Chad R Frasier, Heather A O'Malley, Miriam H Meisler, Lori L Isom
Patients with early infantile epileptic encephalopathy (EIEE) experience severe seizures and cognitive impairment and are at increased risk for sudden unexpected death in epilepsy (SUDEP). EIEE13 [Online Mendelian Inheritance in Man (OMIM) # 614558] is caused by de novo missense mutations in the voltage-gated sodium channel gene SCN8A Here, we investigated the neuronal phenotype of a mouse model expressing the gain-of-function SCN8A patient mutation, p.Asn1768Asp (Nav1.6-N1768D). Our results revealed regional and neuronal subtype specificity in the effects of the N1768D mutation...
February 28, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28193459/epileptiform-activity-and-behavioral-arrests-in-mice-overexpressing-the-calcium-channel-subunit-%C3%AE-2%C3%AE-1
#12
Leonardo C Faria, Feng Gu, Isabel Parada, Ben Barres, Z David Luo, David A Prince
The alpha2delta-1 subunit (α2δ-1) of voltage-gated calcium channels is a receptor for astrocyte-secreted thrombospondins that promote developmental synaptogenesis. Alpha2delta-1 receptors are upregulated in models of injury-induced peripheral pain and epileptogenic neocortical trauma associated with an enhancement of excitatory synaptic connectivity. These results lead to the hypothesis that overexpression of α2δ-1 alone in neocortex of uninjured transgenic (TG) mice might result in increased excitatory connectivity and consequent cortical hyperexcitability and epileptiform activity...
June 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28168619/pure-endoscopic-management-of-epileptogenic-hypothalamic-hamartomas
#13
S Chibbaro, H Cebula, J Scholly, J Todeschi, I Ollivier, A Timofeev, M Ganau, P Di Emidio, M P Valenti, A M Staack, T Bast, B J Steinhoff, E Hirsch, P Kehrli, F Proust
Hypothalamic hamartomas (HH) are rare congenital malformations located in the region of the tuber cinereum and third ventricle. Their usual clinical presentation is characterized by gelastic/dacrystic seizures which often become pharmaco-resistant and progress to secondary focal/generalized intractable epilepsy causing mostly in children cognitive and behavioral problems (particularly in cases of progressive epileptic encephalopathy) and precocious puberty. Whereas gelastic seizures can be surgically controlled either by resection of the lesion or disconnection (tissue-destructive) procedures, aimed at functionally prevent the spreading of the epileptic burst; generalized seizures tend to respond better to HH excision rather than isolated neocortical resections, which generally fail to control them...
February 7, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28135561/focal-cortical-dysplasia-gene-mutations-cell-signaling-and-therapeutic-implications
#14
Philip H Iffland, Peter B Crino
Focal cortical dysplasias (FCDs) are malformations of cortical development (MCDs) that are highly associated with medication-resistant epilepsy and are the most common cause of neocortical epilepsy in children. FCDs are a heterogeneous group of developmental disorders caused by germline or somatic mutations that occur in genes regulating the PI3K/Akt/mTOR pathway-a key pathway in neuronal growth and migration. Accordingly, FCDs are characterized by abnormal cortical lamination, cell morphology (e.g., cytomegaly), and cellular polarity...
January 24, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/28111201/human-ipsc-derived-cerebral-organoids-model-cellular-features-of-lissencephaly-and-reveal-prolonged-mitosis-of-outer-radial-glia
#15
Marina Bershteyn, Tomasz J Nowakowski, Alex A Pollen, Elizabeth Di Lullo, Aishwarya Nene, Anthony Wynshaw-Boris, Arnold R Kriegstein
Classical lissencephaly is a genetic neurological disorder associated with mental retardation and intractable epilepsy, and Miller-Dieker syndrome (MDS) is the most severe form of the disease. In this study, to investigate the effects of MDS on human progenitor subtypes that control neuronal output and influence brain topology, we analyzed cerebral organoids derived from control and MDS-induced pluripotent stem cells (iPSCs) using time-lapse imaging, immunostaining, and single-cell RNA sequencing. We saw a cell migration defect that was rescued when we corrected the MDS causative chromosomal deletion and severe apoptosis of the founder neuroepithelial stem cells, accompanied by increased horizontal cell divisions...
April 6, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28109994/postsurgical-outcome-in-patients-with-olfactory-auras-and-drug-resistant-epilepsy
#16
Ali A Asadi-Pooya, Maromi Nei, Elizabeth E Centurion, Matthew Lorenzo, Michael R Sperling
OBJECTIVES: We investigated the clinical features associated with olfactory auras in patients with drug-resistant epilepsy and also hypothesized that this type of aura may predict worse postsurgical outcome in patients with drug-resistant temporal lobe epilepsy (TLE). METHODS: In this retrospective analysis, data from all patients with drug-resistant epilepsy who underwent epilepsy surgery were reviewed. Patients were prospectively registered in a database from 1986 through 2016...
January 18, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28101481/evaluation-of-ictal-consciousness-in-temporal-and-extra-temporal-epilepsy-observations-from-a-tertiary-care-hospital-in-india
#17
Rima M Chaudhari, Deepa Dash, Bhargavi Ramanujam, Manit K Rana, Renjith Appukuttan, Anubha Sharma, Yuvraj Kunwar, Gaurav Tejaniya, Vasantha Padma, Sarat P Chandra, Manjari Tripathi
BACKGROUND AND PURPOSE: Differences in consciousness during seizures depend on the location of the seizure onset. METHODS: The present study evaluates ictal consciousness using the ictal consciousness inventory (ICI) in drug refractory mesial temporal (MTLE), neocortical temporal (NTLE) and extra temporal epilepsy (ETLE). This was a cross sectional cohort study with 45 patients with mesial temporal epilepsy, 47 with extra temporal and 11 patients with neocortical temporal epilepsy...
December 2016: Journal of Epilepsy Research
https://www.readbyqxmd.com/read/28101477/change-of-patient-selection-strategy-and-improved-surgical-outcome-in-mri-negative-neocortical-epilepsy
#18
Hye-Jin Moon, Dong Wook Kim, Chun-Kee Chung, Jung-Won Shin, Jangsup Moon, Bong Su Kang, Soon-Tae Lee, Keun-Hwa Jung, Kon Chu, Ki-Young Jung, Yong Won Cho, Sang Kun Lee
BACKGROUND AND PURPOSE: It is crucial to make selection strategy to identify surgical candidates among medically refractory MRI-negative neocortical epilepsy patients. In our previous study, we suggested two or more concordance between noninvasive studies (EEG, ictal scalp EEG, interictal FDG-PET, and SPECT) as a new patient selection strategy for MRI-negative neocortical epilepsy surgery. The objective of this study was to evaluate the surgical outcomes of MRI-negative neocortical epilepsy patients before and after the implementation of a new selection strategy...
December 2016: Journal of Epilepsy Research
https://www.readbyqxmd.com/read/28100740/epilepsy-associated-kcnq2-channels-regulate-multiple-intrinsic-properties-of-layer-2-3-pyramidal-neurons
#19
Zachary Niday, Virginia E Hawkins, Heun Soh, Daniel K Mulkey, Anastasios V Tzingounis
KCNQ2 potassium channels are critical for normal brain function, as both loss-of-function and gain-of-function KCNQ2 variants can lead to various forms of neonatal epilepsy. Despite recent progress, the full spectrum of consequences as a result of KCNQ2 dysfunction in neocortical pyramidal neurons is still unknown. Here, we report that conditional ablation of Kcnq2 from mouse neocortex leads to hyperexcitability of layer 2/3 (L2/3) pyramidal neurons, exhibiting an increased input resistance and action potential frequency, as well as a reduced medium afterhyperpolarization (mAHP), a conductance partly mediated by KCNQ2 channels...
January 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28077494/practice-guideline-summary-use-of-fmri-in-the-presurgical-evaluation-of-patients-with-epilepsy-report-of-the-guideline-development-dissemination-and-implementation-subcommittee-of-the-american-academy-of-neurology
#20
Jerzy P Szaflarski, David Gloss, Jeffrey R Binder, William D Gaillard, Alexandra J Golby, Scott K Holland, Jeffrey Ojemann, David C Spencer, Sara J Swanson, Jacqueline A French, William H Theodore
OBJECTIVE: To assess the diagnostic accuracy and prognostic value of functional MRI (fMRI) in determining lateralization and predicting postsurgical language and memory outcomes. METHODS: An 11-member panel evaluated and rated available evidence according to the 2004 American Academy of Neurology process. At least 2 panelists reviewed the full text of 172 articles and selected 37 for data extraction. Case reports, reports with <15 cases, meta-analyses, and editorials were excluded...
January 24, 2017: Neurology
keyword
keyword
26782
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"