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Continuous eeg

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https://www.readbyqxmd.com/read/28646267/quantitative-eeg-metrics-differ-between-outcome-groups-and-change-over-the-first-72%C3%A2-h-in-comatose-cardiac-arrest-patients
#1
Sara Leingang Wiley, Babak Razavi, Prashanth Krishnamohan, Michael Mlynash, Irina Eyngorn, Kimford J Meador, Karen G Hirsch
BACKGROUND: Forty to sixty-six percent of patients resuscitated from cardiac arrest remain comatose, and historic outcome predictors are unreliable. Quantitative spectral analysis of continuous electroencephalography (cEEG) may differ between patients with good and poor outcomes. METHODS: Consecutive patients with post-cardiac arrest hypoxic-ischemic coma undergoing cEEG were enrolled. Spectral analysis was conducted on artifact-free contiguous 5-min cEEG epochs from each hour...
June 23, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28644831/inflammatory-and-vascular-placental-lesions-are-associated-with-neonatal-amplitude-integrated-eeg-recording-in-early-premature-neonates
#2
Dorit Paz-Levy, Letizia Schreiber, Offer Erez, Sharon Goshen, Justin Richardson, VIadimir Drunov, Orna Staretz Chacham, Eilon Shany
INTRODUCTION: Placental histologic examination can assist in revealing the mechanism leading to preterm birth. Accumulating evidence suggests an association between intrauterine pathological processes, morbidity and mortality of premature infants, and their long term outcome. Neonatal brain activity is increasingly monitored in neonatal intensive care units by amplitude integrated EEG (aEEG) and indices of background activity and sleep cycling patterns were correlated with long term outcome...
2017: PloS One
https://www.readbyqxmd.com/read/28644823/eeg-characteristics-in-cooled-and-rewarmed-periods-in-post-cardiac-arrest-therapeutic-hypothermia-patients
#3
K Kim, Kimberly L Pargeon, Amy S Labar, Oren Friedman, Padmaja N Kandula, Douglas R Labar
PURPOSE: Continuous video EEG is a tool to assess brain function in injuries, including cardiac arrest (CA). In post-CA therapeutic hypothermia (TH) studies, some EEG features are linked to poor prognosis, but the evolvement of EEG characteristics during two temperature phases and its significance is unclear. We systematically analyzed EEG characteristics in cooled and rewarmed phases of post-CA therapeutic hypothermia patients and investigated their correlation to patient outcome. METHODS: This is a retrospective study of EEG analyses, from a single academic center, of 20 patients who underwent CA and therapeutic hypothermia...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28642686/transcranial-random-noise-stimulation-trns-shapes-the-processing-of-rapidly-changing-auditory-information
#4
Katharina S Rufener, Philipp Ruhnau, Hans-Jochen Heinze, Tino Zaehle
Neural oscillations in the gamma range are the dominant rhythmic activation pattern in the human auditory cortex. These gamma oscillations are functionally relevant for the processing of rapidly changing acoustic information in both speech and non-speech sounds. Accordingly, there is a tight link between the temporal resolution ability of the auditory system and inherent neural gamma oscillations. Transcranial random noise stimulation (tRNS) has been demonstrated to specifically increase gamma oscillation in the human auditory cortex...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28641453/accuracy-of-limited-montage-electroencephalography-in-monitoring-postanoxic-comatose-patients
#5
Sandipan Pati, Lauren McClain, Lidia Moura, Yuan Fan, M Brandon Westover
BACKGROUND: Continuous EEG (cEEG) monitoring may help to identify the small percentage of adults with hypoxic-ischemic encephalopathy (HIE) who will regain consciousness if allowed sufficient time. However, the limited yield in this population has led some to question the cost-effectiveness cEEG monitoring in this population. We hypothesized that limited-montage cEEG could provide essentially the same neurophysiologic information at lower cost. In this proof of concept study, we aim to demonstrate the potentials of limited channel EEG in prognostication in postanoxic patients...
June 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28634504/the-reemergence-of-eeg-reactivity-after-cardiac-arrest
#6
Joseph Zachariah, Alejandro A Rabinstein
Electroencephalogram (EEG) reactivity has been increasingly utilized in prognostication after cardiac arrest. Recent studies have demonstrated a false-positive rate of 0% in predicting poor outcome with a nonreactive EEG. The reemergence of reactivity after an initial nonreactive EEG has been noted in cases of drug intoxication, rewarming after hypothermia, and after discontinuing sedation. This is the first case describing the reemergence of EEG reactivity without the confounding factors listed above. We describe a case of resuscitated cardiac arrest with initial EEG demonstrating a lack of reactivity...
July 2017: Neurohospitalist
https://www.readbyqxmd.com/read/28634438/computational-models-of-anterior-cingulate-cortex-at-the-crossroads-between-prediction-and-effort
#7
Eliana Vassena, Clay B Holroyd, William H Alexander
In the last two decades the anterior cingulate cortex (ACC) has become one of the most investigated areas of the brain. Extensive neuroimaging evidence suggests countless functions for this region, ranging from conflict and error coding, to social cognition, pain and effortful control. In response to this burgeoning amount of data, a proliferation of computational models has tried to characterize the neurocognitive architecture of ACC. Early seminal models provided a computational explanation for a relatively circumscribed set of empirical findings, mainly accounting for EEG and fMRI evidence...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28630468/neurofeedback-learning-modifies-the-incidence-rate-of-alpha-spindles-but-not-their-duration-and-amplitude
#8
Alexei Ossadtchi, Tatiana Shamaeva, Elizaveta Okorokova, Victoria Moiseeva, Mikhail A Lebedev
Although the first experiments on alpha-neurofeedback date back nearly six decades ago, when Joseph Kamiya reported successful operant conditioning of alpha-rhythm in humans, the effectiveness of this paradigm in various experimental and clinical settings is still a matter of debate. Here, we investigated the changes in EEG patterns during a continuously administered neurofeedback of P4 alpha activity. Two days of neurofeedback training were sufficient for a significant increase in the alpha power to occur...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28627083/a-review-of-important-eeg-features-for-the-assessment-of-brain-maturation-in-premature-infants
#9
REVIEW
Elena Pavlidis, Rhodri O Lloyd, Sean Mathieson, Geraldine B Boylan
This review describes the maturational features of the baseline electroencephalogram (EEG) in the neurologically healthy preterm infant. Features such as continuity, sleep state, synchrony and transient waveforms are described, even from extremely preterm infants and includes abundant illustrated examples. The physiological significance of these EEG features and their relationship to neurodevelopment is highlighted where known. This review also demonstrates the importance of multichannel conventional EEG monitoring for preterm infants as many of the features described are not apparent if limited channel EEG monitors are used...
June 18, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28626013/sleep-disrupts-high-level-speech-parsing-despite-significant-basic-auditory-processing
#10
Shiri Makov, Omer Sharon, Nai Ding, Michal Ben-Shachar, Yuval Nir, Elana Zion Golumbic
The extent to which the sleeping brain processes sensory information remains unclear. This is particularly true for continuous and complex stimuli, such as speech, in which information is organized into hierarchically embedded structures. Recently, novel metrics for assessing the neural representation of continuous speech have been developed, using non-invasive brain recordings. Those were so far tested during wakefulness. Here we investigated, for the first time, the sleeping brain's capacity to process continuous speech at different hierarchical levels, using a newly developed Concurrent Hierarchical Tracking (CHT) approach that can online monitor the neural representation and processing-depth of continuous speech...
June 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28621460/older-adults-display-diminished-error-processing-and-response-in-a-continuous-tracking-task
#11
Francisco L Colino, Harvey Howse, Angela Norton, Robert Trska, Anthony Pluta, Stephen J C Luehr, Todd C Handy, Olave E Krigolson
Advancing age is often accompanied by a decline in motor control that results in a decreased ability to successfully perform motor tasks. While there are multiple factors that contribute to age-related deficits in motor control, one unexplored possibility is that age-related deficits in our ability to evaluate motor output result in an increase in motor errors. In line with this, previous work from our laboratory demonstrated that motor errors evoked an error-related negativity (ERN)-a component of the human ERP associated with error evaluation originating within the human medial-frontal cortex...
June 16, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28618377/ring-and-peg-electrodes-for-minimally-invasive-and-long-term-sub-scalp-eeg-recordings
#12
Y B Benovitski, A Lai, C C McGowan, O Burns, V Maxim, D A X Nayagam, R Millard, G D Rathbone, M A le Chevoir, R A Williams, D B Grayden, C N May, M Murphy, W J D'Souza, M J Cook, C E Williams
OBJECTIVE: Minimally-invasive approaches are needed for long-term reliable Electroencephalography (EEG) recordings to assist with epilepsy diagnosis, investigation and more naturalistic monitoring. This study compared three methods for long-term implantation of sub-scalp EEG electrodes. METHODS: Three types of electrodes (disk, ring, and peg) were fabricated from biocompatible materials and implanted under the scalp in five ambulatory ewes for 3months. Disk electrodes were inserted into sub-pericranial pockets...
June 12, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28618293/pilot-prospective-study-of-post-surgery-sleep-and-eeg-predictors-of-post-operative-delirium
#13
Joanna L Evans, Jacob W Nadler, Xavier A Preud'homme, Eric Fang, Rommie L Daughtry, Joseph B Chapman, David Attarian, Samuel Wellman, Andrew D Krystal
OBJECTIVE: Delirium is a common post-operative complication associated with significant costs, morbidity, and mortality. We sought sleep/EEG predictors of delirium present prior to delirium symptoms to facilitate developing and targeting therapies. METHODS: Continuous EEG data were obtained in 12 patients post-orthopedic surgery from the day of surgery until delirium assessment on post-operative day 2 (POD2). RESULTS: Diminished total sleep time (r=-0...
May 17, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28609734/assessment-of-treatment-patterns-and-healthcare-costs-associated-with-probable-lennox-gastaut-syndrome
#14
J Eric Piña-Garza, Georgia D Montouris, Francis Vekeman, Wendy Y Cheng, Edward Tuttle, Philippe Giguere-Duval, Mei Sheng Duh, Vivienne Shen, Timothy B Saurer, Jouko Isojarvi
Lennox-Gastaut syndrome (LGS) is a chronic and severe form of epilepsy characterized by intractable seizures, cognitive impairment, and abnormal electroencephalogram findings with slow spike-wave complexes. It typically presents before age 8, but symptoms continue into adulthood and require lifelong treatment associated with significant clinical burden. Data on LGS-associated healthcare utilization and costs are limited. In this study we use a claims-based LGS classifier based on random forest methodology to identify patients with probable LGS from the a Medicaid multi-state database and assess its prevalence across the age spectrum, healthcare utilization, treatment patterns, costs, and comorbid conditions...
June 10, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28603676/electrophysiological-correlates-of-aesthetic-processing-of-webpages-a-comparison-of-experts-and-laypersons
#15
Jens Bölte, Thomas M Hösker, Gerrit Hirschfeld, Meinald T Thielsch
We investigated whether design experts or laypersons evaluate webpages differently. Twenty participants, 10 experts and 10 laypersons, judged the aesthetic value of a webpage in an EEG-experiment. Screenshots of 150 webpages, judged as aesthetic or as unaesthetic by another 136 participants, served as stimulus material. Behaviorally, experts and laypersons evaluated unaesthetic webpages similarly, but they differed in their evaluation of aesthetic ones: experts evaluated aesthetic webpages as unaesthetic more often than laypersons did...
2017: PeerJ
https://www.readbyqxmd.com/read/28596539/zebrafish-as-an-animal-model-in-epilepsy-studies-with-multichannel-eeg-recordings
#16
Sung-Joon Cho, Donghak Byun, Tai-Seung Nam, Seok-Yong Choi, Byung-Geun Lee, Myeong-Kyu Kim, Sohee Kim
Despite recent interest in using zebrafish in human disease studies, sparked by their economics, fecundity, easy handling, and homologies to humans, the electrophysiological tools or methods for zebrafish are still inaccessible. Although zebrafish exhibit more significant larval-adult duality than any other animal, most electrophysiological studies using zebrafish are biased by using larvae these days. The results of larval studies not only differ from those conducted with adults but also are unable to delicately manage electroencephalographic montages due to their small size...
June 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28589447/cognitive-neurophysiologic-and-metabolic-sequelae-of-previous-hypoglycemic-coma-revealed-by-hyperinsulinemic-hypoglycemic-clamp-in-type-1-diabetic-patients
#17
Alberto Maran, Cristina Crepaldi, Franco Del Piccolo, Ian Macdonald, Lisa Zarantonello, Angelo Avogaro, Piero Amodio
To examine the relationship between electroencephalographic (EEG) activity and hypoglycemia unawareness, we investigated early parameters of vigilance and awareness of various symptom categories in response to hypoglycemia in intensively treated type 1 diabetic (T1DM) patients with different degrees of hypoglycemia unawareness. Hypoglycemia was induced with a hyperinsulinemic-hypoglycemic clamp in six T1DM patients with a history of hypoglycemia unawareness previous severe hypoglycemic coma (SH) and in six T1DM patients without (C) history of hypoglycemia unawareness previous severe hypoglycemic coma...
June 6, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28577262/altered-eeg-spectral-power-during-rest-and-cognitive-performance-a-comparison-of-preterm-born-adolescents-to-adolescents-with-adhd
#18
Anna-Sophie Rommel, Sarah-Naomi James, Gráinne McLoughlin, Daniel Brandeis, Tobias Banaschewski, Philip Asherson, Jonna Kuntsi
Preterm birth has been associated with an increased risk for ADHD-like behavioural symptoms and cognitive impairments. However, direct comparisons across ADHD and preterm-born samples on neurophysiological measures are limited. The aim of this analysis was to test whether quantitative EEG (QEEG) measures identify differences or similarities in preterm-born adolescents, compared to term-born adolescents with and without ADHD, during resting-state and cognitive task conditions. We directly compared QEEG activity between 186 preterm-born adolescents, 69 term-born adolescents with ADHD and 135 term-born control adolescents during an eyes-open resting-state condition (EO), which previously discriminated between the adolescents with ADHD and controls, and during a cued continuous performance task (CPT-OX)...
June 2, 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/28576433/postictal-apnea-as-an-important-mechanism-for-sudep-a-near-sudep-with-continuous-eeg-ecg-emg-recording
#19
Lang Jin, Ying Zhang, Xiao-Li Wang, Wen-Juan Zhang, Yong-Hong Liu, Zhao Jiang
Sudden unexpected death in epilepsy (SUDEP) is one of the most frequent causes of death among patients with epilepsy. Most SUDEP or near-SUDEP are unwitnessed and not observed or recorded during video-EEG recording in epilepsy monitoring units. This report describes a young woman with post ictal apnea and generalized EEG suppression (PGES) after a secondary generalized tonic-clonic seizure (sGTCS). This was accompanied by bradycardia and then ventricular tachycardia (VT). But at the end of VT, the patient's breath recovered without any intervention, such as cardio-respiratory resuscitation...
May 30, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28574372/monitoring-the-depth-of-anesthesia-using-a-new-adaptive-neuro-fuzzy-system
#20
Ahmad Shalbaf, Mohsen Saffar, Jamie W Sleigh, Reza Shalbaf
Accurate and noninvasive monitoring of the depth of anesthesia (DoA) is highly desirable. Since the anesthetic drugs act mainly on the central nervous system, the analysis of brain activity using electroencephalogram (EEG) is very useful. This paper proposes a novel automated method for assessing the DoA using EEG. Firstly, 11 features including spectral, fractal and entropy are extracted from EEG signal and then, by applying an algorithm according to exhaustive search of all subsets of features, a combination of the best features (Beta-index, sample entropy, shannon permutation entropy and detrended fluctuation analysis) is selected...
May 29, 2017: IEEE Journal of Biomedical and Health Informatics
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