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Amplitude-integrated EEG

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https://www.readbyqxmd.com/read/28206999/early-eeg-power-predicts-mri-injury-in-infants-with-hypoxic-ischemic-encephalopathy
#1
S V Jain, J M Zempel, P Srinivasakumar, M Wallendorf, A Mathur
OBJECTIVE: Early identification of infants with hypoxic-ischemic encephalopathy who have adverse outcomes despite neuroprotection with therapeutic hypothermia (TH) is urgently needed. Recent studies have found limited value of amplitude integrated EEG (aEEG) for predicting short-term outcomes in this population. Other quantitative electroencephalography (EEG) variables reflecting EEG amplitude, such as EEG power, could provide early stratification of a high-risk cohort in this population...
February 16, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28143915/prognostic-accuracy-of-electroencephalograms-in-preterm-infants-a-systematic-review
#2
REVIEW
Emilie Pi Fogtmann, Anne Mette Plomgaard, Gorm Greisen, Christian Gluud
CONTEXT: Brain injury is common in preterm infants, and predictors of neurodevelopmental outcome are relevant. OBJECTIVE: To assess the prognostic test accuracy of the background activity of the EEG recorded as amplitude-integrated EEG (aEEG) or conventional EEG early in life in preterm infants for predicting neurodevelopmental outcome. DATA SOURCES: The Cochrane Library, PubMed, Embase, and the Cumulative Index to Nursing and Allied Health Literature...
January 31, 2017: Pediatrics
https://www.readbyqxmd.com/read/28130246/severe-hypercapnia-causes-reversible-depression-of-aeeg-background-activity-in-neonates-an-observational-study
#3
Lauren C Weeke, Laura M L Dix, Floris Groenendaal, Petra M A Lemmers, Koen P Dijkman, Peter Andriessen, Linda S de Vries, Mona C Toet
INTRODUCTION: Elevated carbon dioxide (CO2) blood levels have a depressant effect on the central nervous system and can lead to coma in adults. Less is known about the effect of CO2 on the neurological function of infants. OBJECTIVE: To describe the effect of acute severe hypercapnia (PaCO2 >70 mm Hg) on amplitude-integrated electroencephalography (aEEG) and cerebral oxygenation in newborn infants. STUDY DESIGN: Observational study of full-term and preterm infants with acute severe hypercapnia (identified by arterial blood gas measurements), monitored with aEEG...
January 27, 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/28110410/neurophysiological-assessment-of-brain-dysfunction-in-critically-ill-patients-an-update
#4
REVIEW
Eric Azabou, Catherine Fischer, Jean Michel Guerit, Djillali Annane, François Mauguiere, Fréderic Lofaso, Tarek Sharshar
The aim of this review was to provide up-to-date information about the usefulness of clinical neurophysiology testing in the management of critically ill patients. Evoked potentials (EPs) and electroencephalogram (EEG) are non-invasive clinical neurophysiology tools that allow an objective assessment of the central nervous system's function at the bedside in intensive care unit (ICU). These tests are quite useful in diagnosing cerebral complications, and establishing the vital and functional prognosis in ICU...
January 21, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28108257/working-memory-load-dependent-spatio-temporal-activity-of-single-trial-p3-response-detected-with-an-adaptive-wavelet-denoiser
#5
Qiushi Zhang, Xueqian Yang, Li Yao, Xiaojie Zhao
Working memory (WM) refers to the holding and manipulation of information during cognitive tasks. Its underlying neural mechanisms have been explored through both functional magnetic resonance imaging (fMRI) and electroencephalography (EEG). Trial-by-trial coupling of simultaneously collected EEG and fMRI signals has become an important and promising approach to study the spatio-temporal dynamics of such cognitive processes. Previous studies have demonstrated a modulation effect of the WM load on both the BOLD response in certain brain areas and the amplitude of P3...
January 17, 2017: Neuroscience
https://www.readbyqxmd.com/read/28081533/eeg-monitoring-technique-influences-the-management-of-hypoxic-ischemic-seizures-in-neonates-undergoing-therapeutic-hypothermia
#6
Saber Jan, Frances J Northington, Charlamaine M Parkinson, Carl E Stafstrom
Electroencephalogram (EEG) monitoring techniques for neonatal hypoxia-ischemia (HI) are evolving over time, and the specific type of EEG utilized could influence seizure diagnosis and management. We examined whether the type of EEG performed affected seizure treatment decisions (e.g., the choice and number of antiseizure drugs [ASDs]) in therapeutic hypothermia-treated neonates with HI from 2007 to 2015 in the Johns Hopkins Hospital Neonatal Intensive Care Unit. During this period, 3 different EEG monitoring protocols were utilized: Period 1 (2007-2009), single, brief conventional EEG (1 h duration) at a variable time during therapeutic hypothermia treatment, i...
January 17, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28068127/basic-composition-and-enriched-integration-in-idiom-processing-an-eeg-study
#7
Paolo Canal, Francesca Pesciarelli, Francesco Vespignani, Nicola Molinaro, Cristina Cacciari
We investigated the extent to which the literal meanings of the words forming literally plausible idioms (e.g., break the ice) are semantically composed and how the idiomatic meaning is integrated in the unfolding sentence representation. Participants read ambiguous idiom strings embedded in highly predictable, literal, and idiomatic contexts while their EEG was recorded. Control sentences only contained the idiom-final word whose cloze values were as high as in literal and idiomatic contexts. Event-related potentials data showed that differences in the amplitude of a frontal positivity (PNP) emerged at the beginning and at the end of the idiom strings, with the idiomatic context condition associated with more positive voltages...
January 9, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/28062149/prediction-of-neonatal-seizures-in-hypoxic-ischemic-encephalopathy-using-electroencephalograph-power-analyses
#8
Siddharth V Jain, Amit Mathur, Preethi Srinivasakumar, Michael Wallendorf, Joseph P Culver, John M Zempel
BACKGROUND: The severity of the initial encephalopathy in neonatal hypoxic-ischemic encephalopathy correlates with seizure burden. Early electroencephalograph (EEG) background activity reflects the severity of encephalopathy. Thus, we hypothesized that early EEG background would be predictive of subsequent seizures in neonatal hypoxic-ischemic encephalopathy. METHODS: This study included infants undergoing therapeutic hypothermia at St. Louis Children's Hospital between January 2009 and April 2013...
November 11, 2016: Pediatric Neurology
https://www.readbyqxmd.com/read/27979653/perceptual-integration-of-faces-and-voices-depends-on-the-interaction-of-emotional-content-and-spatial-frequency
#9
Jenny Kokinous, Alessandro Tavano, Sonja A Kotz, Erich Schröger
The role of spatial frequencies (SF) is highly debated in emotion perception, but previous work suggests the importance of low SFs for detecting emotion in faces. Furthermore, emotion perception essentially relies on the rapid integration of multimodal information from faces and voices. We used EEG to test the functional relevance of SFs in the integration of emotional and non-emotional audiovisual stimuli. While viewing dynamic face-voice pairs, participants were asked to identify auditory interjections, and the electroencephalogram (EEG) was recorded...
December 12, 2016: Biological Psychology
https://www.readbyqxmd.com/read/27965026/disentangling-stimulus-plausibility-and-contextual-congruency-electro-physiological-evidence-for-differential-cognitive-dynamics
#10
Moreno I Coco, Susana Araujo, Karl Magnus Petersson
Expectancy mechanisms are routinely used by the cognitive system in stimulus processing and in anticipation of appropriate responses. Electrophysiology research has documented negative shifts of brain activity when expectancies are violated within a local stimulus context (e.g., reading an implausible word in a sentence) or more globally between consecutive stimuli (e.g., a narrative of images with an incongruent end). In this EEG study, we examine the interaction between expectancies operating at the level of stimulus plausibility and at more global level of contextual congruency to provide evidence for, or against, a disassociation of the underlying processing mechanisms...
February 2017: Neuropsychologia
https://www.readbyqxmd.com/read/27936219/combined-emd-sloreta-analysis-of-eeg-data-collected-during-a-contour-integration-task
#11
Karema Al-Subari, Saad Al-Baddai, Ana Maria Tomé, Gregor Volberg, Bernd Ludwig, Elmar W Lang
Lately, Ensemble Empirical Mode Decomposition (EEMD) techniques receive growing interest in biomedical data analysis. Event-Related Modes (ERMs) represent features extracted by an EEMD from electroencephalographic (EEG) recordings. We present a new approach for source localization of EEG data based on combining ERMs with inverse models. As the first step, 64 channel EEG recordings are pooled according to six brain areas and decomposed, by applying an EEMD, into their underlying ERMs. Then, based upon the problem at hand, the most closely related ERM, in terms of frequency and amplitude, is combined with inverse modeling techniques for source localization...
2016: PloS One
https://www.readbyqxmd.com/read/27924356/comparison-of-two-common-aeeg-classifications-for-the-prediction-of-neurodevelopmental-outcome-in-preterm-infants
#12
Nora Bruns, Frauke Dransfeld, Britta Hüning, Julia Hobrecht, Tobias Storbeck, Christel Weiss, Ursula Felderhoff-Müser, Hanna Müller
: Neurodevelopmental outcome after prematurity is crucial. The aim was to compare two amplitude-integrated EEG (aEEG) classifications (Hellström-Westas (HW), Burdjalov) for outcome prediction. We recruited 65 infants ≤32 weeks gestational age with aEEG recordings within the first 72 h of life and Bayley testing at 24 months corrected age or death. Statistical analyses were performed for each 24 h section to determine whether very immature/depressed or mature/developed patterns predict survival/neurological outcome and to find predictors for mental development index (MDI) and psychomotor development index (PDI) at 24 months corrected age...
February 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/27895691/prognostic-factors-of-neurological-outcomes-in-late-preterm-and-term-infants-with-perinatal-asphyxia
#13
Sun Young Seo, Gyu Hong Shim, Myoung Jae Chey, Su Jeong You
PURPOSE: This study aimed to identify prognostic factors of neurological outcomes, including developmental delay, cerebral palsy and epilepsy in late-preterm and term infants with perinatal asphyxia. METHODS: All late-preterm and term infants with perinatal asphyxia or hypoxic-ischemic insults who admitted the neonatal intensive care unit of Inje University Sanggye Paik Hospital between 2006 and 2014 and were followed up for at least 2 years were included in this retrospective study...
November 2016: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/27852775/eeg-oscillations-are-modulated-in-different-behavior-related-networks-during-rhythmic-finger-movements
#14
Martin Seeber, Reinhold Scherer, Gernot R Müller-Putz
: Sequencing and timing of body movements are essential to perform motoric tasks. In this study, we investigate the temporal relation between cortical oscillations and human motor behavior (i.e., rhythmic finger movements). High-density EEG recordings were used for source imaging based on individual anatomy. We separated sustained and movement phase-related EEG source amplitudes based on the actual finger movements recorded by a data glove. Sustained amplitude modulations in the contralateral hand area show decrease for α (10-12 Hz) and β (18-24 Hz), but increase for high γ (60-80 Hz) frequencies during the entire movement period...
November 16, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27851463/1828-use-of-amplitude-integrated-eeg-for-super-refractory-status-epilepticus-and-effective-icu-management
#15
Michael Miksa, Gracia Mui, Susan Duberstein Coad
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27845676/a-bidirectional-neural-interface-ic-with-chopper-stabilized-bioadc-array-and-charge-balanced-stimulator
#16
Elliot Greenwald, Ernest So, Qihong Wang, Mohsen Mollazadeh, Christoph Maier, Ralph Etienne-Cummings, Gert Cauwenberghs, Nitish Thakor
We present a bidirectional neural interface with a 4-channel biopotential analog-to-digital converter (bioADC) and a 4-channel current-mode stimulator in 180 nm CMOS. The bioADC directly transduces microvolt biopotentials into a digital representation without a voltage-amplification stage. Each bioADC channel comprises a continuous-time first-order ∆Σ modulator with a chopper-stabilized OTA input and current feedback, followed by a second-order comb-filter decimator with programmable oversampling ratio. Each stimulator channel contains two independent digital-to-analog converters for anodic and cathodic current generation...
October 2016: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/27806789/-feasibility-of-using-amplitude-integrated-electroencephalogram-to-identify-epileptic-seizures-by-pediatric-intensive-care-unit-medical-staff-independently
#17
Q Guan, S Li, X Li, H P Yang, Y Wang, X Y Liu
Objective: To evaluate the feasibility of using amplitude-integrated electroencephalogram (aEEG) to identify epileptic seizures by physicians and nurses in pediatric intensive care unit (PICU) independently. Method: Six testees (two PICU physicians versus one EEG physician and two PICU nurses versus one EEG technician) accepted a short-term training, then interpreted aEEG in a single blinded way. These aEEG recordings with synchronous VEEG monitoring were done from January 2013 to May 2015 in PICU. The testees should recognize and mark both the seizure type and the seizure duration from the two-channel recorder (C3/C4) of aEEG (short-term seizure or status epilepticus (SE))...
November 2, 2016: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/27749457/treatment-effects-on-neonatal-eeg
#18
Rawad Obeid, Tammy N Tsuchida
Conventional EEG and amplitude-integrated electroencephalography are used in neonates to assess prognosis and significant changes in brain activity. Neuroactive medications and hypothermia can influence brain activity and therefore alter EEG interpretation. There are limited studies on the effect of these therapies on neonatal EEG background activity. Medication effects on the EEG or amplitude-integrated electroencephalography include increased interburst interval duration, voltage suppression, and sleep disruption...
October 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27736873/identifying-anatomical-origins-of-coexisting-oscillations-in-the-cortical-microcircuit
#19
Hannah Bos, Markus Diesmann, Moritz Helias
Oscillations are omnipresent in neural population signals, like multi-unit recordings, EEG/MEG, and the local field potential. They have been linked to the population firing rate of neurons, with individual neurons firing in a close-to-irregular fashion at low rates. Using a combination of mean-field and linear response theory we predict the spectra generated in a layered microcircuit model of V1, composed of leaky integrate-and-fire neurons and based on connectivity compiled from anatomical and electrophysiological studies...
October 2016: PLoS Computational Biology
https://www.readbyqxmd.com/read/27716799/rapid-and-objective-assessment-of-neural-function-in-autism-spectrum-disorder-using-transient-visual-evoked-potentials
#20
Paige M Siper, Vance Zemon, James Gordon, Julia George-Jones, Stacey Lurie, Jessica Zweifach, Teresa Tavassoli, A Ting Wang, Jesslyn Jamison, Joseph D Buxbaum, Alexander Kolevzon
OBJECTIVE: There is a critical need to identify biomarkers and objective outcome measures that can be used to understand underlying neural mechanisms in autism spectrum disorder (ASD). Visual evoked potentials (VEPs) offer a noninvasive technique to evaluate the functional integrity of neural mechanisms, specifically visual pathways, while probing for disease pathophysiology. METHODS: Transient VEPs (tVEPs) were obtained from 96 unmedicated children, including 37 children with ASD, 36 typically developing (TD) children, and 23 unaffected siblings (SIBS)...
2016: PloS One
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