keyword
MENU ▼
Read by QxMD icon Read
search

Intracranial EEG

keyword
https://www.readbyqxmd.com/read/28104438/safety-of-externally-stimulated-intracranial-electrodes-during-functional-mri-at-1-5t
#1
Pallab K Bhattacharyya, Jeffery Mullin, Bryan S Lee, Jorge A Gonzalez-Martinez, Stephen E Jones
Surgical resection of the epileptogenic zone (EZ) is a potential cure for medically refractory focal epilepsy. Proper identification of the EZ is essential for such resection. Synergistic application of functional magnetic resonance imaging (fMRI) simultaneously with stimulation of a single externalized intracranial stereotactic EEG (SEEG) electrode has the potential to improve identification of the EZ. While most EEG-fMRI studies use the electrodes passively to record electrical activity, it is possible to stimulate the brain using the electrodes by connecting them with conducting cables to the stimulation hardware...
January 16, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28100728/direct-cortical-stimulation-of-human-posteromedial-cortex
#2
Brett L Foster, Josef Parvizi
BACKGROUND: The posteromedial cortex (PMC) is a collective term for an anatomically heterogeneous area of the brain constituting a core node of the human default mode network (DMN), which is engaged during internally focused subjective cognition such as autobiographical memory. METHODS: We explored the effects of causal perturbations of PMC with direct electric brain stimulation (EBS) during presurgical epilepsy monitoring with intracranial EEG electrodes. RESULTS: Data were collected from 885 stimulations in 25 patients implanted with intracranial electrodes across the PMC...
January 18, 2017: Neurology
https://www.readbyqxmd.com/read/28088805/a-retrospective-analysis-of-stereoelectroencephalography-and-subdural-electroencephalography-for-preoperative-evaluation-of-intractable-epilepsy
#3
Meihua Yang, Yuanshi Ma, Wei Li, Xianjun Shi, Zhi Hou, Ning An, Chunqing Zhang, Lihong Liu, Hui Yang, Dong Zhang, Shiyong Liu
BACKGROUND: Different methods for intracranial electrode recording have various advantages and disadvantages, and controversy exists regarding the complications of stereoelectroencephalography (SEEG) and subdural EEG. OBJECTIVE: The purpose of this study was to determine the efficacy and safety of SEEG by comparing it with subdural EEG. METHODS: Data from 100 patients who underwent SEEG (n = 48) and subdural EEG (n = 52) to evaluate the epileptogenic zone were collected from June 2011 to June 2015...
January 14, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28073096/high-density-scalp-eeg-in-frontal-lobe-epilepsy
#4
Anteneh M Feyissa, Jeffrey W Britton, Jamie Van Gompel, Terrance L Lagerlund, Elson So, Lilly C Wong-Kisiel, Gregory C Cascino, Benjamin H Brinkman, Cindy L Nelson, Robert Watson, Gregory A Worrell
PURPOSE: Localization of seizures in frontal lobe epilepsy using the 10-20 system scalp EEG is often challenging because neocortical seizure can spread rapidly, significant muscle artifact, and the suboptimal spatial resolution for seizure generators involving mesial frontal lobe cortex. Our aim in this study was to determine the value of visual interpretation of 76 channel high density EEG (hdEEG) monitoring (10-10 system) in patients with suspected frontal lobe epilepsy, and to evaluate concordance with MRI, subtraction ictal SPECT co-registered to MRI (SISCOM), conventional EEG, and intracranial EEG (iEEG)...
January 2, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28063789/co-occurrence-of-high-frequency-oscillations-and-delayed-responses-evoked-by-intracranial-electrical-stimulation-in-stereo-eeg-studies
#5
Cristian Donos, Ioana Mîndruţă, Mihai Dragoş Malîia, Alin Raşină, Jean Ciurea, Andrei Barborica
OBJECTIVE: To perform a side-by-side comparison of two epileptogenicity biomarkers, high frequency oscillations (HFOs) and delayed responses (DRs), as a result of single-pulse electrical stimulation. METHODS: We have recorded stimulation-evoked HFOs and DRs in 16 epileptic patients undergoing presurgical evaluation using the stereoelectroencephalographic method. To evaluate converging and complementary information provided by the biomarkers, we analyzed them individually and for logical "and"/"or" combinations between them...
December 18, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28060325/interictal-high-frequency-oscillations-detected-with-simultaneous-magnetoencephalography-and-electroencephalography-as-biomarker-of-pediatric-epilepsy
#6
Christos Papadelis, Eleonora Tamilia, Steven Stufflebeam, Patricia E Grant, Joseph R Madsen, Phillip L Pearl, Naoaki Tanaka
Crucial to the success of epilepsy surgery is the availability of a robust biomarker that identifies the Epileptogenic Zone (EZ). High Frequency Oscillations (HFOs) have emerged as potential presurgical biomarkers for the identification of the EZ in addition to Interictal Epileptiform Discharges (IEDs) and ictal activity. Although they are promising to localize the EZ, they are not yet suited for the diagnosis or monitoring of epilepsy in clinical practice. Primary barriers remain: the lack of a formal and global definition for HFOs; the consequent heterogeneity of methodological approaches used for their study; and the practical difficulties to detect and localize them noninvasively from scalp recordings...
December 6, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28057093/-clinical-features-and-scalp-video-electroencephalogram-analysis-of-patients-with-insular-epilepsy
#7
P Y Qin, L P Li, H X Wang, J Liu, X N Wang, L Song, J Zhang, Z C Sun, N N Hu, J Li, S R Li, C L Yin, Y P Wang
Objective: To explore the clinical and scalp video electroencephalographic(EEG) characteristics of insula lobe epilepsy identified by intracranial electrode, and to provide some references for early diagnosis and clinical evaluation in patients with insula lobe epilepsy. Methods: A total of 12 patients diagnosed with insula lobe epilepsy identified by intracranial electrode were included from Xuanwu Hospital of Capital Medical University from January 2013 to December 2015.Their clinical and EEG data were analyzed...
December 20, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28050973/behavioral-state-classification-in-epileptic-brain-using-intracranial-electrophysiology
#8
Vaclav Kremen, Juliano J Duque, Benjamin H Brinkmann, Brent M Berry, Michal T Kucewicz, Fatemeh Khadjevand, Jamie Van Gompel, Matt Stead, Erik K St Louis, Gregory A Worrell
OBJECTIVE: Automated behavioral state classification can benefit next generation implantable epilepsy devices. In this study we explored the feasibility of automated awake (AW) and slow wave sleep (SWS) classification using wide bandwidth intracranial EEG (iEEG) in patients undergoing evaluation for epilepsy surgery. APPROACH: Data from seven patients (age [Formula: see text], 4 women) who underwent intracranial depth electrode implantation for iEEG monitoring were included...
January 4, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28043201/physiological-ripples-associated-with-sleep-spindles-differ-in-waveform-morphology-from-epileptic-ripples
#9
Jonas C Bruder, Matthias Dümpelmann, Daniel Lachner Piza, Malenka Mader, Andreas Schulze-Bonhage, Julia Jacobs-Le Van
High frequency oscillations (HFOs, 80-500[Formula: see text]Hz) serve as novel electroencephalography (EEG) markers of epileptic tissue. The differentiation of physiological and epileptic HFO is an important challenge and is complicated by the fact that both types are generated in mesiotemporal structures. This study aimed to identify oscillation features that serve to distinguish physiological ripples associated with sleep spindles and epileptic ripples. We studied 19 patients with chronic intracranial EEG(iEEG) with mesiotemporal implantation and simultaneous scalp EEG...
November 2, 2016: International Journal of Neural Systems
https://www.readbyqxmd.com/read/28043058/epilepsy-surgery-in-drug-resistant-temporal-lobe-epilepsy-associated-with-neuronal-antibodies
#10
Mar Carreño, Christian G Bien, Ali A Asadi-Pooya, Michael Sperling, Petr Marusic, Martin Elisak, Jose Pimentel, Tim Wehner, Rajiv Mohanraj, Juan Uranga, Asier Gómez-Ibáñez, Vicente Villanueva, Francisco Gil, Antonio Donaire, Nuria Bargalló, Jordi Rumià, Pedro Roldán, Xavier Setoain, Luis Pintor, Teresa Boget, Eva Bailles, Mercè Falip, Javier Aparicio, Josep Dalmau, Francesc Graus
We assessed the outcome of patients with drug resistant epilepsy and neuronal antibodies who underwent epilepsy surgery. Retrospective study, information collected with a questionnaire sent to epilepsy surgery centers. Thirteen patients identified, with antibodies to GAD (8), Ma2 (2), Hu (1), LGI1 (1) or CASPR2 (1). Mean age at seizure onset: 23 years. Five patients had an encephalitic phase. Three had testicular tumors and five had autoimmune diseases. All had drug resistant temporal lobe epilepsy (median: 20 seizures/month)...
December 15, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/28031992/striatal-morphology-correlates-with-frontostriatal-electrophysiological-motor-processing-in-huntington-s-disease-an-image-hd-study
#11
Lauren M Turner, David Jakabek, Fiona A Wilkes, Rodney J Croft, Andrew Churchyard, Mark Walterfang, Dennis Velakoulis, Jeffrey C L Looi, Nellie Georgiou-Karistianis, Deborah Apthorp
BACKGROUND: Huntington's disease (HD) causes progressive atrophy to the striatum, a critical node in frontostriatal circuitry. Maintenance of motor function is dependent on functional connectivity of these premotor, motor, and dorsolateral frontostriatal circuits, and structural integrity of the striatum itself. We aimed to investigate whether size and shape of the striatum as a measure of frontostriatal circuit structural integrity was correlated with functional frontostriatal electrophysiological neural premotor processing (contingent negative variation, CNV), to better understand motoric structure-function relationships in early HD...
December 2016: Brain and Behavior
https://www.readbyqxmd.com/read/27986925/contributions-of-the-ventral-striatum-to-conscious-perception-an-intracranial-eeg-study-of-the-attentional-blink
#12
Heleen A Slagter, Ali Mazaheri, Leon C Reteig, Ruud Smolders, Martijn Figee, Mariska Mantione, P Richard Schuurman, Damiaan Denys
: The brain is limited in its capacity to consciously process information, necessitating gating of information. While conscious perception is robustly associated with sustained, recurrent interactions between widespread cortical regions, subcortical regions, including the striatum, influence cortical activity. Here, we examined if the ventral striatum, given its ability to modulate cortical information flow, contributes to conscious perception. Using intracranial EEG, we recorded ventral striatum activity while 7 patients performed an attentional blink task in which they had to detect two targets (T1 and T2) in a stream of distractors...
December 16, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27977572/three-dimensional-intracranial-eeg-monitoring-in-presurgical-assessment-of-mri-negative-frontal-lobe-epilepsy
#13
Peng-Fan Yang, Ming-Chao Shang, Qiao Lin, Hui Xiao, Zhen Mei, Yan-Zeng Jia, Wei Liu, Zhong-Hui Zhong
Magnetic resonance imaging (MRI)-negative epilepsy is associated with poor clinical outcomes prognosis. The present study was aimed to assess whether intracranial 3D interictal and ictal electroencephalography (EEG) findings, a combination of EEG at a different depth, in addition to clinical, scalp EEG, and positron emission tomography-computed tomography (PETCT) data help to predict outcome in a series of patients with MRI-negative frontal lobe epilepsy (FLE) after surgery.Patients with MRI-negative FLE who were presurgically evaluated by 3D-intracranial EEG (3D-iEEG) recording were included...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27965619/dynamic-changes-in-spectral-and-spatial-signatures-of-high-frequency-oscillations-in-rat-hippocampi-during-epileptogenesis-in-acute-and-chronic-stages
#14
Pan-Pan Song, Jing Xiang, Li Jiang, Heng-Sheng Chen, Ben-Ke Liu, Yue Hu
OBJECTIVE: To analyze spectral and spatial signatures of high frequency oscillations (HFOs), which include ripples and fast ripples (FRs, >200 Hz) by quantitatively assessing average and peak spectral power in a rat model of different stages of epileptogenesis. METHODS: The lithium-pilocarpine model of temporal lobe epilepsy was used. The acute phase of epilepsy was assessed by recording intracranial electroencephalography (EEG) activity for 1 day after status epilepticus (SE)...
2016: Frontiers in Neurology
https://www.readbyqxmd.com/read/27941990/non-sinusoidal-activity-can-produce-cross-frequency-coupling-in-cortical-signals-in-the-absence-of-functional-interaction-between-neural-sources
#15
Edden M Gerber, Boaz Sadeh, Andrew Ward, Robert T Knight, Leon Y Deouell
The analysis of cross-frequency coupling (CFC) has become popular in studies involving intracranial and scalp EEG recordings in humans. It has been argued that some cases where CFC is mathematically present may not reflect an interaction of two distinct yet functionally coupled neural sources with different frequencies. Here we provide two empirical examples from intracranial recordings where CFC can be shown to be driven by the shape of a periodic waveform rather than by a functional interaction between distinct sources...
2016: PloS One
https://www.readbyqxmd.com/read/27935031/interictal-epileptiform-discharges-impair-word-recall-in-multiple-brain-areas
#16
Peter C Horak, Stephen Meisenhelter, Yinchen Song, Markus E Testorf, Michael J Kahana, Weston D Viles, Krzysztof A Bujarski, Andrew C Connolly, Ashlee A Robbins, Michael R Sperling, Ashwini D Sharan, Gregory A Worrell, Laura R Miller, Robert E Gross, Kathryn A Davis, David W Roberts, Bradley Lega, Sameer A Sheth, Kareem A Zaghloul, Joel M Stein, Sandhitsu R Das, Daniel S Rizzuto, Barbara C Jobst
OBJECTIVES: Interictal epileptiform discharges (IEDs) have been linked to memory impairment, but the spatial and temporal dynamics of this relationship remain elusive. In the present study, we aim to systematically characterize the brain areas and times at which IEDs affect memory. METHODS: Eighty epilepsy patients participated in a delayed free recall task while undergoing intracranial electroencephalography (EEG) monitoring. We analyzed the locations and timing of IEDs relative to the behavioral data in order to measure their effects on memory...
December 9, 2016: Epilepsia
https://www.readbyqxmd.com/read/27931117/resection-planning-in-extratemporal-epilepsy-surgery-using-3d-multimodality-imaging-and-intraoperative-mri
#17
Mark Nowell, Rachel Sparks, Gergely Zombori, Anna Miserocchi, Roman Rodionov, Beate Diehl, Tim Wehner, Mark White, Sebastien Ourselin, Andrew McEvoy, John Duncan
Surgical resection in non-lesional, extratemporal epilepsy, informed by stereoEEG recordings, is challenging. There are no clear borders of resection, and the surgeon is often operating in deep areas of the brain that are difficult to access. We present a technical note where 3D multimodality image integration in EpiNav(TM) is used to build a planned resection model, based on a previous intracranial EEG evaluation. Intraoperative MRI is then used to ensure a complete resection of the planned model. As stereoEEG becomes more common in the presurgical evaluation of epilepsy, these tools will become increasingly important to facilitate targeted cortical resections...
December 8, 2016: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/27928951/analysis-of-adverse-events-related-to-720-cases-of-neural-stem-progenitor-cell-transplantation
#18
Suqing Qu, Weipeng Liu, Hui Yang, Zhaoyan Wang, Yinxiang Yang, Fang Liu, Kan Du, Sheng He, Zuo Luan
: The aim of this study is to explore the safety issue from 720 cases of neural progenitor cell transplantation through a retrospective analysis of adverse events based on clinic manifestations and examinations. Results showed that 166/720 cases had postoperative crying and irritability, 69/720 vomiting and 84/720 fever. None of them had CNS infection, but 4 cases presented intracranial hemorrhage. One month after cell therapy, 568/720 cases received EEG test, which showed improvement in 153 patients, abnormal changes in 74 and no changes in 341 cases; two patients developed new-onset convulsions and 3 recurrent convulsions;6 cases had intracranial hemorrhage , but no other CNS sequelae left from the primary diseases...
December 7, 2016: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/27927961/nasal-respiration-entrains-human-limbic-oscillations-and-modulates-cognitive-function
#19
Christina Zelano, Heidi Jiang, Guangyu Zhou, Nikita Arora, Stephan Schuele, Joshua Rosenow, Jay A Gottfried
: The need to breathe links the mammalian olfactory system inextricably to the respiratory rhythms that draw air through the nose. In rodents and other small animals, slow oscillations of local field potential activity are driven at the rate of breathing (∼2-12 Hz) in olfactory bulb and cortex, and faster oscillatory bursts are coupled to specific phases of the respiratory cycle. These dynamic rhythms are thought to regulate cortical excitability and coordinate network interactions, helping to shape olfactory coding, memory, and behavior...
December 7, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27919842/propagation-of-seizures-in-a-case-of-lesional-mid-cingulate-gyrus-epilepsy-studied-by-stereo-eeg
#20
Rafeed Alkawadri, Jorge Gonzalez-Martinez, Nicolas Gaspard, Andreas V Alexopoulos
Little is known about the propagation of seizures arising from the cingulate gyrus, as cingulate coverage with interhemispheric subdural electrodes is usually challenging and incomplete due to inherent anatomical and vascular limitations. We present a case of lesional mid-cingulate epilepsy confirmed by stereotactically implanted intracranial depth electrodes and subsequent surgical resection. Hypermotor symptomatology was seen during the first seven seconds of seizure onset while the seizure was still confined to the mid-cingulate gyrus contacts...
December 1, 2016: Epileptic Disorders: International Epilepsy Journal with Videotape
keyword
keyword
43853
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"