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https://www.readbyqxmd.com/read/28735381/characterization-of-the-sensorimotor-rhythm-in-4-month-old-infants-born-at-term-and-premature
#1
Milene Roca-Stappung, Minerva Moguel-González, Thalía Fernández, Thalía Harmony, Omar Mendoza-Montoya, José Luis Marroquín, Salvador Ruiz-Correa, Lourdes Díaz-Comas, Gloria Otero-Ojeda
The sensorimotor rhythm (SMR) is an electroencephalographic rhythm associated with motor and cognitive development observed in the central brain regions during wakefulness in the absence of movement, and it reacts contralaterally to generalized and hemibody movements. The purpose of this work was to characterize the SMR of 4-month-old infants, born either healthy at term or prematurely with periventricular leukomalacia (PVL). Two groups of infants were formed: healthy and premature with PVL. Their electroencephalograms (EEGs) were recorded in four conditions: rest, free movement, right-hand grasping and left-hand grasping, in order to explore general reactivity to free movement and contralateral reactivity in hand-grasping conditions...
July 22, 2017: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/28729916/dynamic-expression-of-cx36-protein-in-kainic-acid-kindling-induced-epilepsy
#2
Xue-Mei Wu, Guang-Liang Wang, Xiao-Sheng Hao, Jia-Chun Feng
Connexin (Cx) 36 is known to be a component of gap junctions, and has been suggested to play an important role in epilepsy. In order to determine dynamic changes of Cx36 protein expression in epilepsy and investigate the role of Cx36 in electroencephalographic activity and pathogenesis, we utilized kainic acid (KA) to induce epileptogenesis. We found that epileptic discharges began 71.8 ± 23.7 s after KA administration. Spike frequency and amplitude of epileptiform activity reached maximal levels at 30 ± 5...
2017: Translational Neuroscience
https://www.readbyqxmd.com/read/28729833/altered-neuronal-activity-topography-markers-in-the-elderly-with-increased-atherosclerosis
#3
Takashi Shibata, Toshimitu Musha, Yukio Kosugi, Michiya Kubo, Yukio Horie, Naoya Kuwayama, Satoshi Kuroda, Karin Hayashi, Yohei Kobayashi, Mieko Tanaka, Haruyasu Matsuzaki, Kiyotaka Nemoto, Takashi Asada
Background: Previously, we reported on vascular cognitive impairment (VCI) templates, consisting of patients with VCI associated with carotid stenosis (>60%) using a quantitative electroencephalographic (EEG) technique called neuronal activity topography (NAT). Here using the VCI templates, we investigated the hypothesis that internal carotid artery-intima-media thickness (ICA-IMT) is associated with EEG spectrum intensity (sNAT) and spectrum steepness (vNAT). Methods: A total of 221 community-dwelling elderly subjects were recruited...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28729830/resting-state-fluctuations-of-eeg-sensorimotor-rhythm-reflect-bold-activities-in-the-pericentral-areas-a-simultaneous-eeg-fmri-study
#4
Shohei Tsuchimoto, Shuka Shibusawa, Nobuaki Mizuguchi, Kenji Kato, Hiroki Ebata, Meigen Liu, Takashi Hanakawa, Junichi Ushiba
Blockade of the scalp electroencephalographic (EEG) sensorimotor rhythm (SMR) is a well-known phenomenon following attempted or executed motor functions. Such a frequency-specific power attenuation of the SMR occurs in the alpha and beta frequency bands and is spatially registered at primary somatosensory and motor cortices. Here, we hypothesized that resting-state fluctuations of the SMR in the alpha and beta frequency bands also covary with resting-state sensorimotor cortical activity, without involving task-related neural dynamics...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28729822/low-intensity-focused-tdcs-over-the-motor-cortex-shows-inefficacy-to-improve-motor-imagery-performance
#5
Irma N Angulo-Sherman, Marisol Rodríguez-Ugarte, Eduardo Iáñez, Jose M Azorín
Transcranial direct current stimulation (tDCS) is a brain stimulation technique that can enhance motor activity by stimulating the motor path. Thus, tDCS has the potential of improving the performance of brain-computer interfaces during motor neurorehabilitation. tDCS effects depend on several aspects, including the current density, which usually varies between 0.02 and 0.08 mA/cm(2), and the location of the stimulation electrodes. Hence, testing tDCS montages at several current levels would allow the selection of current parameters for improving stimulation outcomes and the comparison of montages...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28729388/effects-of-acute-hypoxia-on-human-cognitive-processing-a-study-using-erps-and-seps
#6
Hiroki Nakata, Tadayoshi Miyamoto, Shigehiko Ogoh, Ryusuke Kakigi, Manabu Shibasaki
Although hypoxia has the potential to impair the cognitive function, the effects of acute hypoxia on the high-order brain function (executive and/or inhibitory processing) and somatosensory ascending processing remain unknown. We tested the hypothesis that acute hypoxia impairs both motor executive and inhibitory processing and somatosensory ascending processing. Fifteen healthy subjects performed two sessions (Sessions 1 and 2) consisting of electroencephalographic event-related potentials (ERPs) with somatosensory Go/No-go paradigms and somatosensory-evoked potentials (SEPs) under two conditions (hypoxia and normoxia) on different days...
July 20, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28729063/eeg-source-reconstruction-evidence-for-the-noun-verb-neural-dissociation-along-semantic-dimensions
#7
Bin Zhao, Jianwu Dang, Gaoyan Zhang
One of the long-standing issues in neurolinguistic research is about the neural basis of word representation, concerning whether grammatical classification or semantic difference causes neural dissociation of the brain activity patterns when processing different word categories, especially nouns and verbs. To disentangle the puzzle, four orthogonalized word categories in Chinese: unambiguous nouns (UN), unambiguous verbs (UV), ambiguous words with noun-biased semantics (AN), and ambiguous words with verb-biased semantics (AV) were applied in auditory tasks for recording electroencephalographic (EEG) signals from 128 electrodes on the scalps of twenty-two subjects...
July 17, 2017: Neuroscience
https://www.readbyqxmd.com/read/28727792/aging-working-memory-capacity-and-the-proactive-control-of-recollection-an-event-related-potential-study
#8
Jessica Keating, Caitlin Affleck-Brodie, Ronny Wiegand, Alexa M Morcom
The present study investigated the role of working memory capacity (WMC) in the control of recollection in young and older adults. We used electroencephalographic event-related potentials (ERPs) to examine the effects of age and of individual differences in WMC on the ability to prioritize recollection according to current goals. Targets in a recognition exclusion task were words encoded using two alternative decisions. The left parietal ERP old/new effect was used as an electrophysiological index of recollection, and the selectivity of recollection measured in terms of the difference in its magnitude according to whether recognized items were targets or non-targets...
2017: PloS One
https://www.readbyqxmd.com/read/28725924/effect-of-training-status-on-beta-range-corticomuscular-coherence-in-agonist-vs-antagonist-muscles-during-isometric-knee-contractions
#9
Fabien Dal Maso, Marieke Longcamp, Sylvain Cremoux, David Amarantini
Antagonist muscle co-activation is thought to be partially regulated by cortical influences, but direct motor cortex involvement is not fully understood. Corticomuscular coherence (CMC) measures direct functional coupling of the motor cortex and muscles. As antagonist co-activation differs according to training status, comparison of CMC in agonist and antagonist muscles and in strength-trained and endurance-trained individuals may provide in-depth knowledge of cortical implication in antagonist muscle co-activation...
July 19, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28725175/how-different-eeg-references-influence-sensor-level-functional-connectivity-graphs
#10
Yunzhi Huang, Junpeng Zhang, Yuan Cui, Gang Yang, Ling He, Qi Liu, Guangfu Yin
Highlights: Hamming Distance is applied to distinguish the difference of functional connectivity networkThe orientations of sources are testified to influence the scalp Functional Connectivity Graph (FCG) from different references significantlyREST, the reference electrode standardization technique, is proved to have an overall stable and excellent performance in variable situations. The choice of an electroencephalograph (EEG) reference is a practical issue for the study of brain functional connectivity. To study how EEG reference influence functional connectivity estimation (FCE), this study compares the differences of FCE resulting from the different references such as REST (the reference electrode standardization technique), average reference (AR), linked mastoids (LM), and left mastoid references (LR)...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28724985/increased-neural-noise-and-impaired-brain-synchronization-in-fibromyalgia-patients-during-cognitive-interference
#11
A J González-Villar, N Samartin-Veiga, M Arias, M T Carrillo-de-la-Peña
Fibromyalgia (FM) and other chronic pain syndromes are associated with cognitive dysfunction and attentional deficits, but the neural basis of such alterations is poorly understood. Dyscognition may be related to high levels of neural noise, understood as increased random electrical fluctuations that impair neural communication; however, this hypothesis has not yet been tested in any chronic pain condition. Here we compared electroencephalographic activity (EEG) in 18 FM patients -with high self-reported levels of cognitive dysfunction- and 22 controls during a cognitive control task...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28722249/memory-in-3-month-old-infants-benefits-from-a-short-nap
#12
Klára Horváth, Benjamin Hannon, Peter P Ujma, Ferenc Gombos, Kim Plunkett
A broad range of studies demonstrate that sleep has a facilitating role in memory consolidation (see Rasch & Born, ). Whether sleep-dependent memory consolidation is also apparent in infants in their first few months of life has not been investigated. We demonstrate that 3-month-old infants only remember a cartoon face approximately 1.5-2 hours after its first presentation when a period of sleep followed learning. Furthermore, habituation time, that is, the time to become bored with a stimulus shown repetitively, correlated negatively with the density of infant sleep spindles, implying that processing speed is linked to specific electroencephalographic components of sleep...
July 18, 2017: Developmental Science
https://www.readbyqxmd.com/read/28716391/electroencephalographic-markers-of-conscious-and-unconscious-perception
#13
EDITORIAL
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July 14, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28715343/deep-belief-networks-for-electroencephalography-a-review-of-recent-contributions-and-future-outlooks
#14
Faezeh Movahedi, James L Coyle, Ervin Sejdic
Deep learning, a relatively new branch of machine learning, has been investigated for use in a variety of biomedical applications. Deep learning algorithms have been used to analyze different physiological signals and gain a better understanding of human physiology for automated diagnosis of abnormal conditions. In this manuscript, we provide an overview of deep learning approaches with a focus on deep belief networks in electroencephalography applications. We investigate the state of- the-art algorithms for deep belief networks and then cover the application of these algorithms and their performances in electroencephalographic applications...
July 14, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28714768/macronutrient-composition-of-a-morning-meal-and-the-maintenance-of-attention-throughout-the-morning
#15
Tommy J Wilson, Michael J Gray, Jan-Willem Van Klinken, Melissa Kaczmarczyk, John J Foxe
BACKGROUND: At present, the impact of macronutrient composition and nutrient intake on sustained attention in adults is unclear, although some prior work suggests that nutritive interventions that engender slow, steady glucose availability support sustained attention after consumption. A separate line of evidence suggests that nutrient consumption may alter electroencephalographic markers of neurophysiological activity, including neural oscillations in the alpha-band (8-14 Hz), which are known to be richly interconnected with the allocation of attention...
July 17, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28713043/auditory-discrimination-improvement-predicts-awakening-of-postanoxic-comatose-patients-treated-with-targeted-temperature-management-at-36%C3%A2-c
#16
Christian Pfeiffer, Nathalie Ata Nguepno Nguissi, Magali Chytiris, Phanie Bidlingmeyer, Matthias Haenggi, Rebekka Kurmann, Frédéric Zubler, Mauro Oddo, Andrea O Rossetti, Marzia De Lucia
BACKGROUND: Outcome prognostication in postanoxic comatose patients is more accurate in predicting poor than good recovery. Using electroencephalography recordings in patients treated with targeted temperature management at 33°C (TTM 33), we have previously shown that improvement in auditory discrimination over the first days of coma predicted awakening. Given the increased application of a 36°C temperature target (TTM 36), here we aimed at validating the predictive value of auditory discrimination in the TTM 36 setting...
July 13, 2017: Resuscitation
https://www.readbyqxmd.com/read/28711291/clinical-value-and-predictors-of-subclinical-seizures-in-patients-with-temporal-lobe-epilepsy-undergoing-scalp-video-eeg-monitoring
#17
Shan Wang, Bo Jin, Linglin Yang, Cong Chen, Yao Ding, Yi Guo, Zhongjin Wang, Wenjie Ming, Yelei Tang, Shuang Wang, Meiping Ding
The aim of this study was to determine the clinical importance and predictors of SCSs in a large population of patients with temporal epilepsy (TLE) undergoing video electroencephalographic (VEEG) monitoring. We reviewed the VEEG data of 327 consecutive patients with TLE admitted to our epilepsy center between August 2012 and January 2017. Demographic, electro-clinical, and neuroimaging data were recorded and re-analyzed. To our knowledge, this is the first study assessing SCSs recorded by long-term VEEG monitoring in patients with TLE...
July 12, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28709879/the-neural-bases-of-ictal-tachycardia-in-temporal-lobe-seizures
#18
Florian Chouchou, Romain Bouet, Vincent Pichot, Hélène Catenoix, François Mauguière, Julien Jung
OBJECTIVE: Due to limited information from scalp electroencephalographic (EEG) recordings, brain areas driving changes in cardiac rhythm during Temporal lobe (TL) seizures are not clearly identified. Using stereotactic EEG (SEEG) recordings, we aimed at identifying which of the brain regions involved in autonomic control trigger ictal tachycardia. METHODS: The neural activity of several mesial temporal lobe structures including amygdala, hippocampus, insula, and lateral temporal lobe recorded with SEEG were collected during 37 TL seizures in 9 patients, using indices based on High Frequency Activity (HFA)...
June 27, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28709123/subclinical-white-matter-lesions-and-medial-temporal-lobe-atrophy-are-associated-with-eeg-slowing-in-a-memory-clinic-cohort
#19
Milica G Kramberger, Katarina Giske, Lena Cavallin, Ingemar Kåreholt, Thomas Andersson, Bengt Winblad, Vesna Jelic
OBJECTIVE: The aim of the study was to describe the relationship between electroencephalographic (EEG) findings obtained by standardized visual analysis, subclinical white matter lesions (WML) and brain atrophy in a large memory clinic population. METHODS: Patients with Alzheimer's disease (AD, n=58), mild cognitive impairment (MCI, n=141), subjective cognitive impairment (SCI, n=194) had clinical, MRI based WML severity and regional atrophy assessments, and routine resting EEG recording...
June 15, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28708890/electroencephalographic-characterization-of-subgroups-of-children-with-learning-disorders
#20
Milene Roca-Stappung, Thalía Fernández, Jorge Bosch-Bayard, Thalía Harmony, Josefina Ricardo-Garcell
Electroencephalographic alterations have been reported in subjects with learning disorders, but there is no consensus on what characterizes their electroencephalogram findings. Our objective was to determine if there were subgroups within a group of scholars with not otherwise specified learning disorders and if they had specific electroencephalographic patterns. Eighty-five subjects (31 female, 8-11 years) who scored low in at least two subscales -reading, writing and arithmetic- of the Infant Neuropsychological Evaluation were included...
2017: PloS One
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