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https://www.readbyqxmd.com/read/29683431/a-brain-computer-interface-based-on-miniature-event-related-potentials-induced-by-very-small-lateral-visual-stimuli
#1
Minpeng Xu, Xiaolin Xiao, Yijun Wang, Hongzhi Qi, Tzyy-Ping Jung, Dong Ming
GOAL: Traditional visual brain-computer interfaces (BCIs) preferred to use large-size stimuli to attract the user's attention and elicit distinct electroencephalography (EEG) features. However, the visual stimuli are of no interest to the users as they just serve as the hidden codes behind the characters. Furthermore, using stronger visual stimuli could cause visual fatigue and other adverse symptoms to users. Therefore, it's imperative for visual BCIs to use small and inconspicuous visual stimuli to code characters...
May 2018: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/29681924/multiclass-informative-instance-transfer-learning-framework-for-motor-imagery-based-brain-computer-interface
#2
Ibrahim Hossain, Abbas Khosravi, Imali Hettiarachchi, Saeid Nahavandi
A widely discussed paradigm for brain-computer interface (BCI) is the motor imagery task using noninvasive electroencephalography (EEG) modality. It often requires long training session for collecting a large amount of EEG data which makes user exhausted. One of the approaches to shorten this session is utilizing the instances from past users to train the learner for the novel user. In this work, direct transferring from past users is investigated and applied to multiclass motor imagery BCI. Then, active learning (AL) driven informative instance transfer learning has been attempted for multiclass BCI...
2018: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/29681807/primary-sensorimotor-cortex-drives-the-common-cortical-network-for-gamma-synchronization-in-voluntary-hand-movements
#3
Gertrúd Tamás, Venkata C Chirumamilla, Abdul R Anwar, Jan Raethjen, Günther Deuschl, Sergiu Groppa, Muthuraman Muthuraman
Background: Gamma synchronization (GS) may promote the processing between functionally related cortico-subcortical neural populations. Our aim was to identify the sources of GS and to analyze the direction of information flow in cerebral networks at the beginning of phasic movements, and during medium-strength isometric contraction of the hand. Methods: We measured 64-channel electroencephalography in 11 healthy volunteers (age: 25 ± 8 years; four females); surface electromyography detected the movements of the dominant hand...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29681792/a-study-of-the-effects-of-electrode-number-and-decoding-algorithm-on-online-eeg-based-bci-behavioral-performance
#4
Jianjun Meng, Bradley J Edelman, Jaron Olsoe, Gabriel Jacobs, Shuying Zhang, Angeliki Beyko, Bin He
Motor imagery-based brain-computer interface (BCI) using electroencephalography (EEG) has demonstrated promising applications by directly decoding users' movement related mental intention. The selection of control signals, e.g., the channel configuration and decoding algorithm, plays a vital role in the online performance and progressing of BCI control. While several offline analyses report the effect of these factors on BCI accuracy for a single session-performance increases asymptotically by increasing the number of channels, saturates, and then decreases-no online study, to the best of our knowledge, has yet been performed to compare for a single session or across training...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29681427/incidence-and-characteristics-of-norovirus-associated-benign-convulsions-with-mild-gastroenteritis-in-comparison-with-rotavirus-ones
#5
Bo Ram Kim, Ga Eun Choi, Young Ok Kim, Min Ji Kim, Eun Song Song, Young Jong Woo
BACKGROUND AND PURPOSE: Rotavirus was detected in 40-50% of patients with benign convulsions with mild gastroenteritis (CwG) before the rotavirus vaccine was introduced in late 2000. However, the rate of rotavirus positivity has decreased since 2010 while the prevalence of norovirus has gradually increased. We investigated the incidence of norovirus-associated CwG during a recent 3-year period and additionally compared the characteristics of norovirus-associated CwG with those of rotavirus-associated CwG...
April 19, 2018: Brain & Development
https://www.readbyqxmd.com/read/29680498/sleep-eeg-spectral-power-is-correlated-with-subjective-objective-discrepancy-of-sleep-onset-latency-in-major-depressive-disorder
#6
Seung-Gul Kang, Sara Mariani, Stephanie A Marvin, Kwang-Pil Ko, Susan Redline, John W Winkelman
We aimed to identify the sleep electroencephalography (EEG) spectral power correlates of the subjective-objective discrepancy (SOD) of sleep onset latency (SOL) in major depressive disorder (MDD), primary insomnia (PI), and normal sleeping control (NSC) groups. We examined relative power values in standard frequency bands of the EEG spectra during the first Non-Rapid Eye Movement (NREM) sleep period as correlates of SOD of SOL between sleep diary and polysomnography in MDD (n = 36), PI (n = 19), and NSC (n = 23) groups...
April 19, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29680471/the-neu-prem-trial-neuromonitoring-of-brains-of-infants-born-preterm-during-resuscitation-a-prospective-observational-cohort-study
#7
Anup C Katheria, M J Harbert, Sunil B Nagaraj, Kathy Arnell, Debra M Poeltler, Melissa K Brown, Wade Rich, Kasim O Hassen, Neil Finer
OBJECTIVE: To determine whether monitoring cerebral oxygen tissue saturation (StO2 ) with near-infrared spectroscopy (NIRS) and brain activity with amplitude-integrated electroencephalography (aEEG) can predict infants at risk for intraventricular hemorrhage (IVH) and death in the first 72 hours of life. STUDY DESIGN: A NIRS sensor and electroencephalography leads were placed on 127 newborns <32 weeks of gestational age at birth. Ten minutes of continuous NIRS and aEEG along with heart rate, peripheral arterial oxygen saturation, fraction of inspired oxygen, and mean airway pressure measurements were obtained in the delivery room...
April 16, 2018: Journal of Pediatrics
https://www.readbyqxmd.com/read/29679985/does-burst-suppression-achieve-seizure-control-in-refractory-status-epilepticus
#8
Kanitpong Phabphal, Suparat Chisurajinda, Thapanee Somboon, Kanjana Unwongse, Alan Geater
BACKGROUND: The general principles in the administration of anesthetic drugs entail not only the suppression of seizure activity but also the achievement of electroencephalography burst suppression (BS). However, previous studies have reported conflicting results, possibly owing to the inclusion of various anesthetic agents, not all patients undergoing continuous electroencephalography (cEEG), and the inclusion of anoxic encephalopathy. This study aimed to analyze the effects of midazolam-induced BS on the occurrence outcomes in refractory status epilepticus patients...
April 21, 2018: BMC Neurology
https://www.readbyqxmd.com/read/29679698/neurophysiological-and-neuroradiological-multimodal-approach-for-early-poor-outcome-prediction-after-cardiac-arrest
#9
Maenia Scarpino, Giovanni Lanzo, Francesco Lolli, Riccardo Carrai, Marco Moretti, Maddalena Spalletti, Morena Cozzolino, Adriano Peris, Aldo Amantini, Antonello Grippo
INTRODUCTION: Prognosticating outcome after cardiac arrest(CA) requires a multimodal approach. However, evidence regarding combinations of methods is limited. We evaluated whether the combination of electroencephalography(EEG), somatosensory evoked potentials(SEPs) and brain computed tomography(CT) could predict poor outcome. METHODS: We screened our database regarding patients successfully resuscitated after CA, for whom EEG, SEPs and brain CT were available within 24 hours...
April 18, 2018: Resuscitation
https://www.readbyqxmd.com/read/29679244/attenuated-lpp-to-emotional-face-stimuli-associated-with-parent-and-self-reported-depression-in-children-and-adolescents
#10
Madlen Grunewald, Mirko Döhnert, Daniel Brandeis, Annette Maria Klein, Kai von Klitzing, Tina Matuschek, Stephanie Stadelmann
Individuals diagnosed with a depressive disorder have been found to show reduced reactions to emotional information consistent with the hypothesis of an emotional context insensitivity. However, there are contradictory findings of enhanced reactivity and mood-congruent processing. Electroencephalography (EEG) recordings of the late positive potential (LPP) can display such blunted or enhanced activity. Due to these contradictory findings, there is a need to clarify the role of the LPP in the emergence and presence of depressive disorders especially in children...
April 20, 2018: Journal of Abnormal Child Psychology
https://www.readbyqxmd.com/read/29678758/identification-of-memory-reactivation-during-sleep-by-eeg-classification
#11
Suliman Belal, James Cousins, Wael El-Deredy, Laura Parkes, Jules Schneider, Hikaru Tsujimura, Alexia Zoumpoulaki, Marta Perapoch, Lorena Santamaria Covariabus, Penelope Lewis
Memory reactivation during sleep is critical for consolidation, but also extremely difficult to measure as it is subtle, distributed and temporally unpredictable. This article reports a novel method for detecting such reactivation in standard sleep recordings. During learning, participants produced a complex sequence of finger presses, with each finger cued by a distinct audio-visual stimulus. Auditory cues were then re-played during subsequent sleep to trigger neural reactivation through a method known as targeted memory reactivation (TMR)...
April 17, 2018: NeuroImage
https://www.readbyqxmd.com/read/29677690/investigating-the-effects-of-visual-distractors-on-the-performance-of-a-motor-imagery-brain-computer-interface
#12
Zahra Emami, Tom Chau
OBJECTIVES: Brain-computer interfaces (BCIs) allow users to operate a device or application by means of cognitive activity. This technology will ultimately be used in real-world environments which include the presence of distractors. The purpose of the study was to determine the effect of visual distractors on BCI performance. METHODS: Sixteen able-bodied participants underwent neurofeedback training to achieve motor imagery-guided BCI control in an online paradigm using electroencephalography (EEG) to measure neural signals...
April 3, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29677337/determinants-of-neural-responses-to-disparity-in-natural-scenes
#13
Yiran Duan, Alexandra Yakovleva, Anthony M Norcia
We studied disparity-evoked responses in natural scenes using high-density electroencephalography (EEG) in an event-related design. Thirty natural scenes that mainly included outdoor settings with trees and buildings were used. Twenty-four subjects viewed a series of trials composed of sequential two-alternative temporal forced-choice presentation of two different versions (two-dimensional [2D] vs. three-dimensional [3D]) of the same scene interleaved by a scrambled image with the same power spectrum. Scenes were viewed orthostereoscopically at 3 m through a pair of shutter glasses...
March 1, 2018: Journal of Vision
https://www.readbyqxmd.com/read/29677014/continuous-electroencephalography-in-the-critically-ill-clinical-and-continuous-electroencephalography-markers-for-targeted-monitoring
#14
Christopher R Newey, Tyler G Kinzy, Vineet Punia, Stephen Hantus
PURPOSE: Electrographic seizures detected by continuous electroencephalography (CEEG) in critically ill patients with altered mental status is becoming increasingly recognized. Data guiding the appropriate selection of patients to be monitored on CEEG are lacking. The aims of this article were to study the incidence of seizures in the critical care setting and to evaluate for clinical predictors to improve the efficiency of CEEG monitoring. METHODS: Retrospective review of the CEEG and clinical data on 1,123 consecutive patients who had continuous video EEG over a 24-month period...
April 17, 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29676287/electrophysiological-correlates-of-neurodegeneration-in-motor-and-non-motor-brain-regions-in-amyotrophic-lateral-sclerosis-implications-for-brain-computer-interfacing
#15
Philipp Kellmeyer, Moritz Grosse-Wentrup, Andreas Schulze-Bonhage, Ulf Ziemann, Tonio Ball
For patients with amyotrophic lateral sclerosis (ALS) who are suffering from severe communication or motor problems, brain-computer interfaces (BCIs) can improve the quality of life and patient autonomy. However, current BCI systems are not as widely used as their potential and patient demand would let assume. This underutilization is a result of technological as well as user-based limitations but also of the comparatively poor performance of currently existing BCIs in patients with late-stage ALS, particularly in the locked-in state...
April 20, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29674949/effect-of-different-movement-speed-modes-on-human-action-observation-an-eeg-study
#16
Tian-Jian Luo, Jitu Lv, Fei Chao, Changle Zhou
Action observation (AO) generates event-related desynchronization (ERD) suppressions in the human brain by activating partial regions of the human mirror neuron system (hMNS). The activation of the hMNS response to AO remains controversial for several reasons. Therefore, this study investigated the activation of the hMNS response to a speed factor of AO by controlling the movement speed modes of a humanoid robot's arm movements. Since hMNS activation is reflected by ERD suppressions, electroencephalography (EEG) with BCI analysis methods for ERD suppressions were used as the recording and analysis modalities...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29673530/brief-introduction-to-electroencephalography
#17
Alex Proekt
Electroencephalography (EEG) has a long history in neuroscience starting with its original description in humans by Hans Berger in 1929 (Berger, 1932). Investigations of EEG under anesthesia started soon after in the mid-1930s (Gibbs, 1937). No single methodology paper can credibly cover all of the issues relating to this rich field. The purpose of this chapter is to introduce some caveats that complicate and inform analysis of the EEG. Special emphasis will be given to common issues such as choice of reference electrode, filtering, artifact rejection, and spectral analysis...
2018: Methods in Enzymology
https://www.readbyqxmd.com/read/29672310/significance-of-fdg-pet-hypermetabolism-in-children-with-intractable-focal-epilepsy
#18
Solon Schur, Victoria Allen, Andrew White, David Mirsky, Nicholas Stence, Brent O'Neill, Michael Handler, Roy Dudley, Pramote Laoprasert
BACKGROUND: Interictal 18F-fluorodeoxyglucose-positron emission topography (FDG-PET) hypometabolism is routinely used in the presurgical workup of children with medically intractable epilepsy (MIE). FDG-PET hypermetabolism, however, is rarely seen, and the significance of this finding in the epilepsy workup is not well established. METHODS: We performed a retrospective study of patients who underwent FDG-PET during the presurgical workup of MIE over a 4-year period, between 1 January 2010 and 31 December 2013, at the Children's Hospital Colorado, CO, USA...
April 19, 2018: Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29670518/on-the-physiological-modulation-and-potential-mechanisms-underlying-parieto-occipital-alpha-oscillations
#19
REVIEW
Diego Lozano-Soldevilla
The parieto-occipital alpha (8-13 Hz) rhythm is by far the strongest spectral fingerprint in the human brain. Almost 90 years later, its physiological origin is still far from clear. In this Research Topic I review human pharmacological studies using electroencephalography (EEG) and magnetoencephalography (MEG) that investigated the physiological mechanisms behind posterior alpha. Based on results from classical and recent experimental studies, I find a wide spectrum of drugs that modulate parieto-occipital alpha power...
2018: Frontiers in Computational Neuroscience
https://www.readbyqxmd.com/read/29670114/entrainment-of-theta-not-alpha-oscillations-is-predictive-of-the-brightness-enhancement-of-a-flickering-stimulus
#20
Jennifer K Bertrand, Nathan J Wispinski, Kyle E Mathewson, Craig S Chapman
Frequency-dependent brightness enhancement, where a flickering light can appear twice as bright as an equiluminant constant light, has been reported to exist within the alpha (8-12 Hz) band. Could oscillatory neural activity be driving this perceptual effect? Here, in two experiments, human subjects reported which of two flickering stimuli were brighter. Strikingly, 4 Hz stimuli were reported as brighter more than 80% of the time when compared to all other tested frequencies, even though all stimuli were equiluminant and of equal temporal length...
April 18, 2018: Scientific Reports
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