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https://www.readbyqxmd.com/read/29331054/artist-a-fully-automated-artifact-rejection-algorithm-for-single-pulse-tms-eeg-data
#1
Wei Wu, Corey J Keller, Nigel C Rogasch, Parker Longwell, Emmanuel Shpigel, Camarin E Rolle, Amit Etkin
Concurrent single-pulse TMS-EEG (spTMS-EEG) is an emerging noninvasive tool for probing causal brain dynamics in humans. However, in addition to the common artifacts in standard EEG data, spTMS-EEG data suffer from enormous stimulation-induced artifacts, posing significant challenges to the extraction of neural information. Typically, neural signals are analyzed after a manual time-intensive and often subjective process of artifact rejection. Here we describe a fully automated algorithm for spTMS-EEG artifact rejection...
January 13, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29322820/reevaluation-of-the-critically-ill-patients-with-nonconvulsive-status-epilepticus-by-using-salzburg-consensus-criteria
#2
Ozlem Gungor Tuncer, Ebru Altindag, Sevda Ozel Yildiz, Mecbure Nalbantoglu, Mehmet Eren Acik, Sedef Tavukcu Ozkan, Betul Baykan
OBJECTIVE: We aimed to assess the usefulness of the Salzburg Consensus Criteria (SCC) for determining the prognosis of critically ill patients with nonconvulsive status epilepticus (NCSE). METHODS: We retrospectively reviewed consecutive patients with unconsciousness followed up in the intensive care unit (ICU). Three clinical neurophysiologists, one of them blinded to clinical and laboratory data, reevaluated all EEG data independently and determined NCSE according to SCC...
January 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29322500/seizure-onset-predicts-its-type
#3
Cristian Donos, Mihai Dragos Maliia, Matthias Dümpelmann, Andreas Schulze-Bonhage
OBJECTIVE: Epilepsy is characterized by transient alterations in brain synchronization resulting in seizures with a wide spectrum of manifestations. Seizure severity and risks for patients depend on the evolution and spread of the hypersynchronous discharges. With standard visual inspection and pattern classification, this evolution could not be predicted early on. It is still unclear to what degree the seizure onset zone determines seizure severity. Such information would improve our understanding of ictal epileptic activity and the existing electroencephalogram (EEG)-based warning and intervention systems, providing specific reactions to upcoming seizure types...
January 11, 2018: Epilepsia
https://www.readbyqxmd.com/read/29315614/defining-the-phenotypic-spectrum-of-slc6a1-mutations
#4
Katrine M Johannesen, Elena Gardella, Tarja Linnankivi, Carolina Courage, Anne de Saint Martin, Anna-Elina Lehesjoki, Cyril Mignot, Alexandra Afenjar, Gaetan Lesca, Marie-Thérèse Abi-Warde, Jamel Chelly, Amélie Piton, J Lawrence Merritt, Lance H Rodan, Wen-Hann Tan, Lynne M Bird, Mark Nespeca, Joseph G Gleeson, Yongjin Yoo, Murim Choi, Jong-Hee Chae, Desiree Czapansky-Beilman, Sara Chadwick Reichert, Manuela Pendziwiat, Judith S Verhoeven, Helenius J Schelhaas, Orrin Devinsky, Jakob Christensen, Nicola Specchio, Marina Trivisano, Yvonne G Weber, Caroline Nava, Boris Keren, Diane Doummar, Elise Schaefer, Sarah Hopkins, Holly Dubbs, Jessica E Shaw, Laura Pisani, Candace T Myers, Sha Tang, Shan Tang, Deb K Pal, John J Millichap, Gemma L Carvill, Kathrine L Helbig, Oriano Mecarelli, Pasquale Striano, Ingo Helbig, Guido Rubboli, Heather C Mefford, Rikke S Møller
OBJECTIVE: Pathogenic SLC6A1 variants were recently described in patients with myoclonic atonic epilepsy (MAE) and intellectual disability (ID). We set out to define the phenotypic spectrum in a larger cohort of SCL6A1-mutated patients. METHODS: We collected 24 SLC6A1 probands and 6 affected family members. Four previously published cases were included for further electroclinical description. In total, we reviewed the electroclinical data of 34 subjects. RESULTS: Cognitive development was impaired in 33/34 (97%) subjects; 28/34 had mild to moderate ID, with language impairment being the most common feature...
January 8, 2018: Epilepsia
https://www.readbyqxmd.com/read/29305876/resting-frontal-eeg-asymmetry-patterns-in-adolescents-with-and-without-major-depression
#5
Barbara D Grünewald, Ellen Greimel, Monika Trinkl, Jürgen Bartling, Nicola Großheinrich, Gerd Schulte-Körne
More right-sided frontal brain resting activity has been postulated to be a correlate of major depression in adults. In children and adolescents, more right-sided activity (as indicated by more left-sided alpha activity) seems to be associated with psychosocial risk factors. However, an association of frontal asymmetry and manifest unipolar depression has not been shown in adolescents so far. We analyzed frontal asymmetry in 20 adolescents (12-17 years) with unipolar depression (12 with first episode, 8 with recurrent depression) and 31 healthy age-matched controls...
January 3, 2018: Biological Psychology
https://www.readbyqxmd.com/read/29302203/a-novel-visualization-method-for-sleep-spindles-based-on-source-localization-of-high-density-eeg
#6
Soohyun Lee, Seunghwan Kim, Jee Hyun Choi
Equivalent dipole source localization is a well-established approach to localizing the electrical activity in electroencephalogram (EEG). So far, source localization has been used primarily in localizing the epileptic source in human epileptic patients. Currently, source localization techniques have been applied to account for localizing epileptic source among the epileptic patients. Here, we present the first application of source localization in the field of sleep spindle in mouse brain. The spatial distribution of cortical potential was obtained by high density EEG and then the anterior and posterior sleep spindles were classified based on the K-mean clustering algorithm...
December 2017: Experimental Neurobiology
https://www.readbyqxmd.com/read/29299677/compression-of-a-giant-pseudomeningocele-causing-transient-anoxic-seizures-a-case-report
#7
Alhafidz Hamdan, A Saxena, G Rao, M Ivanov
Transient anoxic seizure upon application of pressure on a giant pseudomeningocele has never been reported in the literature; such abrupt changes in intracranial pressure due to large volume of cerebrospinal fluid (CSF) translocation, if left untreated may lead to permanent cerebral hypoxic injury and death. Here we describe a case of a 26-year-old woman who had undergone lumbar disc surgery in another unit few months ago and developed a large lump around her back. Any pressure on the lump resulted in headaches and at times episodes of seizures...
January 3, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29297303/an-improved-discriminative-filter-bank-selection-approach-for-motor-imagery-eeg-signal-classification-using-mutual-information
#8
Shiu Kumar, Alok Sharma, Tatsuhiko Tsunoda
BACKGROUND: Common spatial pattern (CSP) has been an effective technique for feature extraction in electroencephalography (EEG) based brain computer interfaces (BCIs). However, motor imagery EEG signal feature extraction using CSP generally depends on the selection of the frequency bands to a great extent. METHODS: In this study, we propose a mutual information based frequency band selection approach. The idea of the proposed method is to utilize the information from all the available channels for effectively selecting the most discriminative filter banks...
December 28, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/29291534/dynamic-pattern-decoding-of-source-reconstructed-meg-or-eeg-data-perspective-of-multivariate-pattern-analysis-and-signal-leakage
#9
Bakul Gohel, Sanghyun Lim, Min-Young Kim, Hyukchan Kwon, Kiwoong Kim
Recently, an increasing number of studies have employed multivariate pattern analysis (MVPA) rather than univariate analysis for the dynamic pattern decoding of event-related responses recorded with a MEG/EEG sensor. The use of the MVPA approach for source-reconstructed MEG/EEG data is uncommon. For these data, we need to consider the source orientation information and the signal leakage among brain regions. In the present study, we evaluate the perspective of the MVPA approach in the context of source orientation information and signal leakage in source-reconstructed MEG data...
December 26, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29288994/detecting-sub-second-changes-in-brain-activation-patterns-during-interictal-epileptic-spike-using-simultaneous-eeg-fmri
#10
Epifanio Bagarinao, Satoshi Maesawa, Yuji Ito, Naotaka Usui, Jun Natsume, Hirohisa Watanabe, Minoru Hoshiyama, Toshihiko Wakabayashi, Gen Sobue, Shinji Naganawa, Haruo Isoda
OBJECTIVE: Epileptic spikes are associated with rapidly changing brain activation involving the epileptic foci and other brain regions in the "epileptic network". We aim to resolve these activation changes using simultaneous electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) recordings. METHODS: Simultaneous EEG-fMRI recordings from 9 patients with epilepsy were used in the analysis. Our method employed the whole scalp EEG data to generate regressors for the analysis of fMRI data using the general linear model...
November 27, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29283204/binding-language-structuring-sentences-through-precisely-timed-oscillatory-mechanisms
#11
Katrien Segaert, Ali Mazaheri, Peter Hagoort
Syntactic binding refers to combining words into larger structures. Using EEG, we investigated the neural processes involved in syntactic binding. Participants were auditorily presented two-word sentences (i.e. pronoun and pseudoverb such as 'I grush', 'she grushes', for which syntactic binding can take place) and wordlists (i.e. two pseudoverbs such as 'pob grush', 'pob grushes', for which no binding occurs). Comparing these two conditions, we targeted syntactic binding while minimizing contributions of semantic binding and of other cognitive processes such as working memory...
December 28, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29277651/predictive-coding-of-visual-object-position-ahead-of-moving-objects-revealed-by-time-resolved-eeg-decoding
#12
Hinze Hogendoorn, Anthony N Burkitt
Due to the delays inherent in neuronal transmission, our awareness of sensory events necessarily lags behind the occurrence of those events in the world. If the visual system did not compensate for these delays, we would consistently mislocalize moving objects behind their actual position. Anticipatory mechanisms that might compensate for these delays have been reported in animals, and such mechanisms have also been hypothesized to underlie perceptual effects in humans such as the Flash-Lag Effect. However, to date no direct physiological evidence for anticipatory mechanisms has been found in humans...
December 22, 2017: NeuroImage
https://www.readbyqxmd.com/read/29277581/verbal-and-visuospatial-working-memory-during-pregnancy-eeg-correlation-between-the-prefrontal-and-parietal-cortices
#13
Mayra Linné Almanza Sepúlveda, Marisela Hernández González, Jorge Carlos Hevia Orozco, Claudia Amezcua-Gutiérrez, Miguel Angel Guevara
Pregnancy is a dynamic process during which significant cognitive changes take place. It has been suggested that working memory (WM) is affected during gestation as a result of functional changes among cortical areas, such as the prefrontal and parietal cortices. This study examined cortical electroencephalographic correlations (rEEG) during performance of WM tasks in each trimester of pregnancy. Forty women were divided into 4 groups: first (T1), second (T2), and third (T3) trimester of pregnancy, and a control group of non-pregnant women...
December 22, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29277331/predictive-value-of-eeg-for-febrile-seizure-recurrence
#14
Alberto M Cappellari, Carolina Brizio, Marta B Mazzoni, Giuseppe Bertolozzi, Federica Vianello, Alessia Rocchi, Massimo Belli, Andrea Nossa, Dario Consonni, Gregorio P Milani, Emilio F Fossali
OBJECTIVE: To define the role of the EEG in predicting recurrence of febrile seizures (FS) in children after a first FS. METHODS: Children with a first simple or complex FS who underwent EEG at our hospital were retrospectively enrolled. EEG recordings were classified in three groups: normal, abnormal (slow activity or epileptiform discharges), and pseudo-petit mal discharge (PPMD) pattern. Children were followed-up for at least three years. RESULTS: A total of 126 patients met the entry criteria, and 113 of them completed the follow-up...
December 22, 2017: Brain & Development
https://www.readbyqxmd.com/read/29275174/postanoxic-alpha-theta-or-alpha-theta-coma-clinical-setting-and-neurological-outcome
#15
José L Fernández-Torre, Anjana López-Delgado, Miguel A Hernández-Hernández, Alicia Paramio-Paz, Carla Pía-Martínez, Pedro Orizaola, María Martín-García
AIM: The aim of this study was to determine the prognosis of 26 consecutive adults with alpha coma (AC), theta coma (TC) or alpha-theta coma (ATC) following CRA and to describe the clinical setting and EEG features of these patients. METHODS: We retrospective analyzed a prospectively collected cohort of adult patients diagnosed as having AC, TC or ATC after CRA between January 2008 and June 2016. None of patients included in this analysis underwent therapeutic hypothermia (TH)...
December 21, 2017: Resuscitation
https://www.readbyqxmd.com/read/29275005/behavioral-and-electrophysiological-signatures-of-word-translation-processes
#16
Lea B Jost, Narges Radman, Karin A Buetler, Jean-Marie Annoni
Translation is a demanding process during which a message is analyzed, translated and communicated from one language to another. Despite numerous studies on translation mechanisms, the electrophysiological processes underlying translation with overt production remain largely unexplored. Here, we investigated how behavioral response patterns and spatial-temporal brain dynamics differ in a translation compared to a control within-language word-generation task. We also investigated how forward and backward translation differs on the behavioral and electrophysiological level...
December 21, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/29262437/ictal-interictal-continuum-when-to-worry-about-the-continuous-electroencephalography-pattern
#17
Justine Cormier, Carolina B Maciel, Emily J Gilmore
Continuous electroencephalography (cEEG) monitoring is an invaluable tool in the evaluation of encephalopathy and coma in critically ill patients. Marked increases in cEEG monitoring, coinciding with several societal guideline statements in the last decade, have allowed earlier detection and treatment of clearly harmful patterns, including nonconvulsive seizures (NCSz) and nonconvulsive status epilepticus (NCSE). However, it has also unmasked a range of EEG patterns of less clear clinical significance, with some more "malignant" than others given their potential association with increased neuronal stress and secondary brain injury...
December 2017: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29258554/kbg-syndrome
#18
REVIEW
Dayna Morel Swols, Joseph Foster, Mustafa Tekin
CLINICAL DESCRIPTION: KBG syndrome is characterized by macrodontia of upper central incisors, distinctive craniofacial features such as triangular face, prominent nasal bridge, thin upper lip and synophrys; skeletal findings including short stature, delayed bone age, and costovertebral anomalies; and developmental delay/intellectual disability sometimes associated with seizures and EEG abnormalities. The condition was named KBG syndrome after the initials of the last names of three original families reported in 1975...
December 19, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/29258410/different-cortical-source-activation-patterns-in-children-with-attention-deficit-hyperactivity-disorder-during-a-time-reproduction-task
#19
Shiva Khoshnoud, Mousa Shamsi, Mohammad Ali Nazari, Scott Makeig
Several neurocognitive studies have indicated that children with attention-deficit/hyperactivity disorder (ADHD) exhibit cognitive deficits in perceptual timing functions; however, only a few electroencephalographic studies have investigated their time reproduction abilities. In the present research, 15 children with ADHD were studied along with 19 age-matched control subjects (aged 7-11 years) as they attempted to reproduce shorter (1000 ms) and longer (2200 ms) time intervals. Trial-mean event-related potential (ERP) and event-related spectral perturbation measures were used to compare the electroencephalography (EEG) source-level activity patterns of the ADHD and control subjects during the time-encoding and reproduction phases...
December 19, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/29249962/the-impact-of-age-and-cognitive-reserve-on-resting-state-brain-connectivity
#20
Jessica I Fleck, Julia Kuti, Jeffrey Mercurio, Spencer Mullen, Katherine Austin, Olivia Pereira
Cognitive reserve (CR) is a protective mechanism that supports sustained cognitive function following damage to the physical brain associated with age, injury, or disease. The goal of the research was to identify relationships between age, CR, and brain connectivity. A sample of 90 cognitively normal adults, ages 45-64 years, had their resting-state brain activity recorded with electroencephalography (EEG) and completed a series of memory and executive function assessments. CR was estimated using years of education and verbal IQ scores...
2017: Frontiers in Aging Neuroscience
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