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https://www.readbyqxmd.com/read/28222319/survey-of-the-diagnostic-and-therapeutic-approach-to-new-onset-refractory-status-epilepticus
#1
Christian M Cabrera Kang, Nicolas Gaspard, Suzette M LaRoche, Brandon Foreman
PURPOSE: We conducted a survey of providers to assess for practice patterns in diagnosing and treating new-onset refractory status epilepticus (NORSE). NORSE is the occurrence of prolonged seizures that are not responsive to initial therapies in otherwise healthy individuals without obvious cause on initial presentation. This entity is thought to have multiple etiologies, including autoimmune. METHOD: A 29-question electronic survey was sent to providers included in the Neurocritical Care Society emailing list...
February 9, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28217152/value-of-electroencephalographic-monitoring-in-newborns-with-hypoxic-ischemic-encephalopathy-treated-with-hypothermia
#2
Hatem Hamed Elshorbagy, Ahmed A Azab, Naglaa M Kamal, Naglaa Fathy Barseem, Mohamed M Bassiouny, Mostafa A Elsayed, Tohamy H Elkhouly
BACKGROUND: The values of electroencephalography (EEG) in neonatal hypoxic-ischemic encephalopathy (HIE) during therapeutic hypothermia (TH) are still uncertain. AIMS: The aim of this study is to detect EEG background, the prevalence of seizures during cooling, and to determine different EEG patterns that can predict brain injury in magnetic resonance imaging (MRI). PATIENTS AND METHODS: Thirty-nine newborns with HIE were subjected to TH. Continuous monitoring by video-EEG was carried out throughout cooling and during rewarming...
October 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28215998/photosensitivity-in-generalized-epilepsies
#3
REVIEW
Shervonne Poleon, Jerzy P Szaflarski
Photosensitivity, which is the hallmark of photosensitive epilepsy (PSE), is described as an abnormal EEG response to visual stimuli known as a photoparoxysmal response (PPR). The PPR is a well-recognized phenomenon, occurring in 2-14% of patients with epilepsy but its pathophysiology is not clearly understood. PPR is electrographically described as 2-5Hz spike, spike-wave, or slow wave complexes with frontal and paracentral prevalence. Diagnosis of PPR is confirmed using intermittent photic stimulation (IPS) as well as video monitoring...
February 16, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28215698/decoding-the-time-course-of-object-recognition-in-the-human-brain-from-visual-features-to-categorical-decisions
#4
Erika W Contini, Susan G Wardle, Thomas A Carlson
Visual object recognition is a complex, dynamic process. Multivariate pattern analysis methods, such as decoding, have begun to reveal how the brain processes complex visual information. Recently, temporal decoding methods for EEG and MEG have offered the potential to evaluate the temporal dynamics of object recognition. Here we review the contribution of M/EEG time-series decoding methods to understanding visual object recognition in the human brain. Consistent with the current understanding of the visual processing hierarchy, low-level visual features dominate decodable object representations early in the time-course, with more abstract representations related to object category emerging later...
February 16, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28214765/higher-theta-and-alpha1-coherence-when-listening-to-vedic-recitation-compared-to-coherence-during-transcendental-meditation-practice
#5
Frederick Travis, Niyazi Parim, Amrita Shrivastava
This study compared subjective experiences and EEG patterns in 37 subjects when listening to live Vedic recitation and when practicing Transcendental Meditation (TM). Content analysis of experiences when listening to Vedic recitation yielded three higher-order code. Experiences during Vedic recitation were: (1) deeper than during TM practice; (2) experienced as an inner process; and (3) characterized by lively silence. EEG patterns support these higher-order codes. Theta2 and alpha1 frontal, parietal, and frontal-parietal coherence were significantly higher when listening to Vedic recitation, than during TM practice...
February 16, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28206999/early-eeg-power-predicts-mri-injury-in-infants-with-hypoxic-ischemic-encephalopathy
#6
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/28203564/neurotoxicity-following-the-ingestion-of-bilimbi-fruit-averrhoa-bilimbi-in-an-end-stage-renal-disease-patient-on-hemodialysis
#7
Camille Pereira Caetano, Cinara Barros de Sá, Bruno Antônio Paixão Faleiros, Marcelo Fonseca Coutinho Fernandes Gomes, Edna Regina Silva Pereira
INTRODUCTION: The toxic effects of the ingestion of star fruit (Averrhoa carambola) in chronic kidney disease patients are well described in the literature. Recently, the compound caramboxin has been isolated, explaining the mechanisms of its neurotoxicity. Bilimbi fruit belongs to the family Oxalidaceae, Averrhoa bilimbi species, and exhibits similar biochemical characteristics to star fruit. OBJECTIVE: To report the case of a patient with chronic kidney disease who developed a seizure disorder after the ingestion of bilimbi fruit...
January 2017: Case Reports in Nephrology and Dialysis
https://www.readbyqxmd.com/read/28203468/nonconvulsive-status-epilepticus-resembling-clinical-absence-with-atypical-eeg-pattern
#8
Channaiah Srikanth Mysore, Najib Murr, Rana Zabad, John Bertoni
Objective. We are reporting two cases: a patient with steroid responsive encephalopathy associated with autoimmune thyroiditis (SREAT) and another patient with secondary progressive multiple sclerosis (SPMS), both presenting with altered mental status (AMS) and later diagnosed with nonconvulsive atypical absence status epilepticus (AS), with atypical EEG changes. Methods. A report of two cases. Results. A patient with history of SREAT and the other with SPMS had multiple admissions due to AMS. For both, EEG revealed the presence of a high voltage generalized sharply contoured theta activity...
2017: Case Reports in Neurological Medicine
https://www.readbyqxmd.com/read/28197747/upper-alpha-based-neurofeedback-training-in-chronic-stroke-brain-plasticity-processes-and-cognitive-effects
#9
Silvia Erika Kober, Daniela Schweiger, Johanna Louise Reichert, Christa Neuper, Guilherme Wood
In the present study, we investigated the effects of upper alpha based neurofeedback (NF) training on electrical brain activity and cognitive functions in stroke survivors. Therefore, two single chronic stroke patients with memory deficits (subject A with a bilateral subarachnoid hemorrhage; subject B with an ischemic stroke in the left arteria cerebri media) and a healthy elderly control group (N = 24) received up to ten NF training sessions. To evaluate NF training effects, all participants performed multichannel electroencephalogram (EEG) resting measurements and a neuropsychological test battery assessing different cognitive functions before and after NF training...
February 14, 2017: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/28197086/distinct-neural-signatures-for-very-small-and-very-large-numerosities
#10
Michele Fornaciai, Joonkoo Park
Behavioral studies of numerical cognition have shown that perceptual threshold for numerosity discrimination depends on the range of numerical values to be estimated. Discrimination threshold is constant when comparing very small numerosities via the mechanism called subitizing, while it increases as a function of numerosity for numbers beyond that range governed by subitizing. However, when numerosity gets so large that the individual elements start to form a cluttered ensemble, discrimination threshold increases as a function of the square root of numerosity...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28194612/simultaneous-intracranial-eeg-fmri-shows-inter-modality-correlation-in-time-resolved-connectivity-within-normal-areas-but-not-within-epileptic-regions
#11
Ben Ridley, Jonathan Wirsich, Gaelle Bettus, Roman Rodionov, Teresa Murta, Umair Chaudhary, David Carmichael, Rachel Thornton, Serge Vulliemoz, Andrew McEvoy, Fabrice Wendling, Fabrice Bartolomei, Jean-Philippe Ranjeva, Louis Lemieux, Maxime Guye
For the first time in research in humans, we used simultaneous icEEG-fMRI to examine the link between connectivity in haemodynamic signals during the resting-state (rs) and connectivity derived from electrophysiological activity in terms of the inter-modal connectivity correlation (IMCC). We quantified IMCC in nine patients with drug-resistant epilepsy (i) within brain networks in 'healthy' non-involved cortical zones (NIZ) and (ii) within brain networks involved in generating seizures and interictal spikes (IZ1) or solely spikes (IZ2)...
February 13, 2017: Brain Topography
https://www.readbyqxmd.com/read/28194104/electrophysiological-correlates-of-error-monitoring-and-feedback-processing-in-second-language-learning
#12
Sybrine Bultena, Claudia Danielmeier, Harold Bekkering, Kristin Lemhöfer
Humans monitor their behavior to optimize performance, which presumably relies on stable representations of correct responses. During second language (L2) learning, however, stable representations have yet to be formed while knowledge of the first language (L1) can interfere with learning, which in some cases results in persistent errors. In order to examine how correct L2 representations are stabilized, this study examined performance monitoring in the learning process of second language learners for a feature that conflicts with their first language...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28193862/differential-modulation-of-global-and-local-neural-oscillations-in-rem-sleep-by-homeostatic-sleep-regulation
#13
Bowon Kim, Bernat Kocsis, Eunjin Hwang, Youngsoo Kim, Robert E Strecker, Robert W McCarley, Jee Hyun Choi
Homeostatic rebound in rapid eye movement (REM) sleep normally occurs after acute sleep deprivation, but REM sleep rebound settles on a persistently elevated level despite continued accumulation of REM sleep debt during chronic sleep restriction (CSR). Using high-density EEG in mice, we studied how this pattern of global regulation is implemented in cortical regions with different functions and network architectures. We found that across all areas, slow oscillations repeated the behavioral pattern of persistent enhancement during CSR, whereas high-frequency oscillations showed progressive increases...
February 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28193497/i-act-therefore-i-err-eeg-correlates-of-success-and-failure-in-a-virtual-throwing-game
#14
Boris Yazmir, Miriam Reiner
What are the neural responses to success and failure in a throwing task? To answer this question, we compared Event Related Potentials (ERPs) correlated with success and failure during a highly-ecological-virtual game. Participants played a tennis-like game in an immersive 3D virtual world, against a computer player, by controlling a virtual tennis racket with a force feedback robotic arm. Results showed that success, i.e. hitting the target, and failure, by missing the target, evoked ERP's that differ by peak, latencies, scalp signal distributions, sLORETA source estimation, and time-frequency patterns...
February 11, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28189047/eeg-beta-power-changes-reflect-motor-involvement-in-abstract-action-language-processing
#15
Franziska Schaller, Sabine Weiss, Horst M Müller
Brain oscillations in the α- and β-range become suppressed during motor processing and motor imagery. It has recently been discussed that such power changes also occur during action language processing. In our study, we compared β2-oscillations (16-25Hz) during the observation of prototypical arm movements (revealed via motion tracking) as well as during semantic processing of concrete and abstract sentences containing arm-related action verbs. Whereas we did find a strong desynchronization in the β2-range during action observation, the processing of action sentences evoked a rather weak desynchronization...
February 8, 2017: Brain and Language
https://www.readbyqxmd.com/read/28188330/unravelling-the-effect-of-experimental-pain-on-the-corticomotor-system-using-transcranial-magnetic-stimulation-and-electroencephalography
#16
Marylie Martel, Marie-Philippe Harvey, Francis Houde, Frédéric Balg, Philippe Goffaux, Guillaume Léonard
The interaction between pain and the motor system is well-known, with past studies showing that pain can alter corticomotor excitability and have deleterious effects on motor learning. The aim of this study was to better understand the cortical mechanisms underlying the interaction between pain and the motor system. Experimental pain was induced on 19 young and healthy participants using capsaicin cream, applied on the middle volar part of the left forearm. The effect of pain on brain activity and on the corticomotor system was assessed with electroencephalography (EEG) and transcranial magnetic stimulation (TMS), respectively...
February 10, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28187794/continuous-eeg-monitoring-in-the-intensive-care-unit
#17
G B Young, J Mantia
The purpose and indications for continuous electroencephalography monitoring (CEEG) in intensive care unit (ICU) patients include seizure detection, monitoring the effects of treatment (including depth of sedation), grading and classification of EEG abnormalities, ischemia detection and prognostication. Practical considerations of ICU CEEG include: choice of montages (patterns of electrode placement and connections), EEG electrodes, recognition of artifacts, and the use of automated or computerized analysis...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28187128/neural-mechanisms-of-rhythm-based-temporal-prediction-delta-phase-locking-reflects-temporal-predictability-but-not-rhythmic-entrainment
#18
Assaf Breska, Leon Y Deouell
Predicting the timing of upcoming events enables efficient resource allocation and action preparation. Rhythmic streams, such as music, speech, and biological motion, constitute a pervasive source for temporal predictions. Widely accepted entrainment theories postulate that rhythm-based predictions are mediated by synchronizing low-frequency neural oscillations to the rhythm, as indicated by increased phase concentration (PC) of low-frequency neural activity for rhythmic compared to random streams. However, we show here that PC enhancement in scalp recordings is not specific to rhythms but is observed to the same extent in less periodic streams if they enable memory-based prediction...
February 2017: PLoS Biology
https://www.readbyqxmd.com/read/28184194/eeg-correlates-of-ten-positive-emotions
#19
Xin Hu, Jianwen Yu, Mengdi Song, Chun Yu, Fei Wang, Pei Sun, Daifa Wang, Dan Zhang
Compared with the well documented neurophysiological findings on negative emotions, much less is known about positive emotions. In the present study, we explored the EEG correlates of ten different positive emotions (joy, gratitude, serenity, interest, hope, pride, amusement, inspiration, awe, and love). A group of 20 participants were invited to watch 30 short film clips with their EEGs simultaneously recorded. Distinct topographical patterns for different positive emotions were found for the correlation coefficients between the subjective ratings on the ten positive emotions per film clip and the corresponding EEG spectral powers in different frequency bands...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28180082/executive-attention-deficits-after-traumatic-brain-injury-reflect-impaired-recruitment-of-resources
#20
Sudhin A Shah, Yelena Goldin, Mary M Conte, Andrew M Goldfine, Maliheh Mohamadpour, Brian C Fidali, Keith Cicerone, Nicholas D Schiff
Deficits in attention are a common and devastating consequence of traumatic brain injury (TBI), leading to functional impairments, rehabilitation barriers, and long-term disability. While such deficits are well documented, little is known about their underlying pathophysiology hindering development of effective and targeted interventions. Here we evaluate the integrity of brain systems specific to attentional functions using quantitative assessments of electroencephalography recorded during performance of the Attention Network Test (ANT), a behavioral paradigm that separates alerting, orienting, and executive components of attention...
2017: NeuroImage: Clinical
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