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Amplitude-integrated EEG

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https://www.readbyqxmd.com/read/27895691/prognostic-factors-of-neurological-outcomes-in-late-preterm-and-term-infants-with-perinatal-asphyxia
#1
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
#2
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
#3
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
#4
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...
November 8, 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
#5
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
#6
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
#7
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
#8
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
https://www.readbyqxmd.com/read/27713712/vowels-and-consonants-in-the-brain-evidence-from-magnetoencephalographic-studies-on-the-n1m-in-normal-hearing-listeners
#9
Anna Dora Manca, Mirko Grimaldi
Speech sound perception is one of the most fascinating tasks performed by the human brain. It involves a mapping from continuous acoustic waveforms onto the discrete phonological units computed to store words in the mental lexicon. In this article, we review the magnetoencephalographic studies that have explored the timing and morphology of the N1m component to investigate how vowels and consonants are computed and represented within the auditory cortex. The neurons that are involved in the N1m act to construct a sensory memory of the stimulus due to spatially and temporally distributed activation patterns within the auditory cortex...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27679737/early-high-dose-caffeine-increases-seizure-burden-in-extremely-preterm-neonates-a-preliminary-study
#10
Zachary A Vesoulis, Christopher McPherson, Jeffrey J Neil, Amit M Mathur, Terrie E Inder
Background: Although evidence suggests that methylxanthines may lower the seizure threshold, the effect of high-dose caffeine on seizure burden in preterm infants is not known. This study reports a secondary post hoc analysis of a randomized controlled trial of early high-dose caffeine citrate therapy in preterm infants, evaluating the effect of caffeine on the seizure burden using amplitude-integrated electroencephalography (aEEG). Methods: Seventy-four preterm infants (≤30 weeks gestation) were randomized to receive high-dose (n = 37, 80 mg/kg over 36 hours) or standard-dose (n = 37, 30 mg/kg over 36 hours) caffeine citrate over the first 36 hours followed by standard maintenance therapy...
September 1, 2016: Journal of Caffeine Research
https://www.readbyqxmd.com/read/27659907/discrimination-of-sleep-states-using-continuous-cerebral-bedside-monitoring-amplitude-integrated-electroencephalography-compared-to-polysomnography-in-infants
#11
Laura Bennet, Karinna L Fyfe, Stephanie R Yiallourou, Henriette Merk, Flora Y Wong, Rosemary S C Horne
AIM: Limited two-channel electroencephalography (EEG) and amplitude-integrated EEG (aEEG) monitorings are being increasingly used; however, these measurements have not been compared with polysomnographic monitoring, the gold standard for determining infant sleep states. We aimed to determine the accuracy of two-channel EEG and aEEG recordings in defining sleep states and wakefulness in term infants compared to polysomnographic monitoring. METHODS: Sleep was assessed in eight healthy term born infants (mean: 34 ± 3 days), using simultaneous polysomnography (Compumedics S-Series) and a two-channel EEG monitor (Brainz BRM2)...
December 2016: Acta Paediatrica
https://www.readbyqxmd.com/read/27647158/oscillatory-activity-in-auditory-cortex-reflects-the-perceptual-level-of-audio-tactile-integration
#12
Michael Plöchl, Jeremy Gaston, Tim Mermagen, Peter König, W David Hairston
Cross-modal interactions between sensory channels have been shown to depend on both the spatial disparity and the perceptual similarity between the presented stimuli. Here we investigate the behavioral and neural integration of auditory and tactile stimulus pairs at different levels of spatial disparity. Additionally, we modulated the amplitudes of both stimuli in either a coherent or non-coherent manner. We found that both auditory and tactile localization performance was biased towards the stimulus in the respective other modality...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27633892/sleep-wake-cycle-on-amplitude-integrated-eeg-and-neuroimage-outcomes-in-newborns
#13
Seonkyeong Rhie, Kyu Young Chae, Heui Seung Jo, Kyu Hyung Lee
BACKGROUND: The aim of this study was to evaluate the results of sleep-wake cycle monitoring using amplitude-integrated EEG (aEEG) and neuroimaging in newborn infants with a possible perinatal hypoxic insult, investigate the correlation between the findings, and determine the relevance of the findings to reasonably predict neurological outcome. METHODS: aEEG was recorded among newborn infants suspected of perinatal asphyxia between November, 2014 and June, 2015 in one neonatal intensive care unit facility...
2016: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/27577720/adaptive-behaviour-and-feedback-processing-integrate-experience-and-instruction-in-reinforcement-learning
#14
Anne-Marike Schiffer, Kayla Siletti, Florian Waszak, Nick Yeung
In any non-deterministic environment, unexpected events can indicate true changes in the world (and require behavioural adaptation) or reflect chance occurrence (and must be discounted). Adaptive behaviour requires distinguishing these possibilities. We investigated how humans achieve this by integrating high-level information from instruction and experience. In a series of EEG experiments, instructions modulated the perceived informativeness of feedback: Participants performed a novel probabilistic reinforcement learning task, receiving instructions about reliability of feedback or volatility of the environment...
August 27, 2016: NeuroImage
https://www.readbyqxmd.com/read/27375464/eeg-and-eye-tracking-demonstrate-vigilance-enhancement-with-challenge-integration
#15
Indu P Bodala, Junhua Li, Nitish V Thakor, Hasan Al-Nashash
Maintaining vigilance is possibly the first requirement for surveillance tasks where personnel are faced with monotonous yet intensive monitoring tasks. Decrement in vigilance in such situations could result in dangerous consequences such as accidents, loss of life and system failure. In this paper, we investigate the possibility to enhance vigilance or sustained attention using "challenge integration," a strategy that integrates a primary task with challenging stimuli. A primary surveillance task (identifying an intruder in a simulated factory environment) and a challenge stimulus (periods of rain obscuring the surveillance scene) were employed to test the changes in vigilance levels...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27271341/cerebral-function-monitoring-on-a-general-paediatric-ward-feasibility-and-potential
#16
Vivek Kalra, Shahul Sikkander Shaw, Stacey Dixon, Divyen K Shah, Paul Clarke
UNLABELLED: Cerebral function monitoring is widely used in neonatal intensive care, but its potential role in assessment of older infants is scarcely reported. We reviewed the use of cerebral function monitoring on a general paediatric ward in a series of young infants admitted with abnormal movements. Review of the amplitude-integrated EEG obtained by cerebral function monitoring revealed electrographic seizures in four of seven infants monitored. We also surveyed general paediatric wards in hospitals in our region of the UK to ask about current use of cerebral function monitoring and local availability of formal electroencephalography services...
August 2016: European Journal of Pediatrics
https://www.readbyqxmd.com/read/27263529/cold-evoked-potentials-ready-for-clinical-use
#17
P Hüllemann, A Nerdal, A Binder, S Helfert, M Reimer, R Baron
BACKGROUND: Cold-evoked potentials (CEPs) are known to assess the integrity of A-delta fibres and the spinothalamic tract. Nevertheless, the clinical value was not investigated previously. The aim of this study was to measure CEPs in 16 healthy subjects from the face, hand and foot sole and to investigate whether CEPs reliably detect A-delta fibre abnormalities. METHODS: Swift cold stimuli were applied to the skin with a commercially available thermode, which cooled down from 30 to 25 °C in approximately 0...
June 5, 2016: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/27252629/compensatory-recovery-after-multisensory-stimulation-in-hemianopic-patients-behavioral-and-neurophysiological-components
#18
Paolo A Grasso, Elisabetta Làdavas, Caterina Bertini
Lateralized post-chiasmatic lesions of the primary visual pathway result in loss of visual perception in the field retinotopically corresponding to the damaged cortical area. However, patients with visual field defects have shown enhanced detection and localization of multisensory audio-visual pairs presented in the blind field. This preserved multisensory integrative ability (i.e., crossmodal blindsight) seems to be subserved by the spared retino-colliculo-dorsal pathway. According to this view, audio-visual integrative mechanisms could be used to increase the functionality of the spared circuit and, as a consequence, might represent an important tool for the rehabilitation of visual field defects...
2016: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/27238075/influence-of-attention-on-bimodal-integration-during-emotional-change-decoding-erp-evidence
#19
Xuhai Chen, Lingzi Han, Zhihui Pan, Yangmei Luo, Ping Wang
Recent findings on audiovisual emotional interactions suggest that selective attention affects cross-sensory interaction from an early processing stage. However, the influence of attention manipulation on facial-vocal integration during emotional change perception is still elusive at this point. To address this issue, we asked participants to detect emotional changes conveyed by prosodies (vocal task) or facial expressions (facial task) while facial, vocal, and facial-vocal expressions were presented. At the same time, behavioral responses and electroencephalogram (EEG) were recorded...
August 2016: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/27230038/comparison-of-amplitude-integrated-eeg-and-conventional-eeg-in-a-cohort-of-premature-infants
#20
Irina Meledin, Muhammad Abu Tailakh, Shlomo Gilat, Hagai Yogev, Agneta Golan, Victor Novack, Eilon Shany
OBJECTIVE: To compare amplitude-integrated EEG (aEEG) and conventional EEG (EEG) activity in premature neonates. METHODS: Biweekly aEEG and EEG were simultaneously recorded in a cohort of infants born less than 34 weeks gestation. aEEG recordings were visually assessed for lower and upper border amplitude and bandwidth. EEG recordings were compressed for visual evaluation of continuity and assessed using a signal processing software for interburst intervals (IBI) and frequencies' amplitude...
May 25, 2016: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
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