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https://www.readbyqxmd.com/read/28735084/a-category-specific-top-down-attentional-set-can-affect-the-neural-responses-outside-the-current-focus-of-attention
#1
Yunpeng Jiang, Xia Wu, Xiaorong Gao
A top-down set can guide attention to enhance the processing of task-relevant objects. Many studies have found that the top-down set can be tuned to a category level. However, it is unclear whether the category-specific top-down set involving a central search task can exist outside the current area of attentional focus. To directly probe the neural responses inside and outside the current focus of attention, we recorded continuous EEG to measure the contralateral ERP components for central targets and the steady-state visual evoked potential (SSVEP) oscillations associated with a flickering checkerboard placed on the visual periphery...
July 19, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28734769/influence-of-epileptic-activity-during-sleep-on-cognitive-performance-in-benign-childhood-epilepsy-with-centrotemporal-spikes
#2
Andreea Nissenkorn, Adi Pappo, Yael Feldmann, Gali Heimer, Omer Bar-Yosef, Michal Tzadok, Orli Polack, Ayelet Bord, Miriam Levav, Bruria Ben-Zeev
BACKGROUND: Benign childhood epilepsy with centrotemporal spikes is benign childhood epilepsy, presenting between 4 and 10 years of age, characterized by typical clinical and EEG findings. Despite excellent prognosis, there are reports of mild cognitive, language, fine motor and behavioral difficulties. In its atypical form - electrical status epilepticus during slow wave sleep, continuous epileptiform activity during sleep lead to severe neurocognitive deterioration. Our objective was to investigate the influence of abundant sleep epileptiform activity, not fulfilling the criteria for electrical status epilepticus during Slow Wave Sleep, discovered randomly in children without overt intellectual impairment...
July 11, 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/28716674/pleasant-and-unpleasant-odour-face-combinations-influence-face-and-odour-perception-an-event-related-potential-study
#3
Stephanie Cook, Katerina Kokmotou, Vicente Soto, Nicholas Fallon, John Tyson-Carr, Anna Thomas, Timo Giesbrecht, Matt Field, Andrej Stancak
Odours alter evaluations of concurrent visual stimuli. However, neural mechanisms underlying the effects of congruent and incongruent odours on facial expression perception are not clear. Moreover, the influence of emotional faces on odour perception is not established. We investigated the effects of one pleasant and one unpleasant odour paired with happy and disgusted faces, on subjective ratings and ERP responses to faces. Participants rated the pleasantness of happy and disgusted faces that appeared during 3second pleasant or unpleasant odour pulses, or without odour...
July 14, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28714768/macronutrient-composition-of-a-morning-meal-and-the-maintenance-of-attention-throughout-the-morning
#4
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/28713258/relationship-of-topology-multiscale-phase-synchronization-and-state-transitions-in-human-brain-networks
#5
Minkyung Kim, Seunghwan Kim, George A Mashour, UnCheol Lee
How the brain reconstitutes consciousness and cognition after a major perturbation like general anesthesia is an important question with significant neuroscientific and clinical implications. Recent empirical studies in animals and humans suggest that the recovery of consciousness after anesthesia is not random but ordered. Emergence patterns have been classified as progressive and abrupt transitions from anesthesia to consciousness, with associated differences in duration and electroencephalogram (EEG) properties...
2017: Frontiers in Computational Neuroscience
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
#6
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/28706480/task-context-influences-brain-activation-during-music-listening
#7
Andjela Markovic, Jürg Kühnis, Lutz Jäncke
In this paper, we examined brain activation in subjects during two music listening conditions: listening while simultaneously rating the musical piece being played [Listening and Rating (LR)] and listening to the musical pieces unconstrained [Listening (L)]. Using these two conditions, we tested whether the sequence in which the two conditions were fulfilled influenced the brain activation observable during the L condition (LR → L or L → LR). We recorded high-density EEG during the playing of four well-known positively experienced soundtracks in two subject groups...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28692981/a-new-method-to-test-the-efficiency-of-cochlear-implant-artifacts-removal-from-auditory-evoked-potentials
#8
Virginie Attina, Faten Mina, Pierre Stahl, Yvan Duroc, Evelyne Veuillet, Eric Truy, Hung Thai-Van
Auditory Evoked Potentials (AEPs) are of great interest to objectively evaluate the audition in cochlear implant (CI) recipients. However, these measures are impeded by CI stimulation electrical artifacts present in the EEG. In a first part, this study investigates the use of a hybrid model approximating CI patient data. This model gives access to both uncontaminated and denoised data, thus allowing for the evaluation of CI artifact removal methods. Here the efficiency of Independent Component Analysis (ICA) is evaluated in the context of Auditory Steady State Responses (ASSRs)...
July 6, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28691593/electrographic-seizures-in-preterm-neonates-in-the-neonatal-intensive-care-unit
#9
Ersida Buraniqi, Arnold J Sansevere, Kush Kapur, Ann M Bergin, Phillip L Pearl, Tobias Loddenkemper
OBJECTIVE: Characterize clinical and electroencephalography (EEG) characteristics of preterm neonates undergoing continuous EEG in the neonatal intensive care unit. METHODS: Retrospective study of preterm neonates born less than 37 weeks' gestational age undergoing continuous EEG in the neonatal intensive care unit at Boston Children's Hospital over a 2-year period. RESULTS: Fifty-two preterms (46% male) had a mean gestational age of 32.8 weeks (standard deviation = 4...
January 1, 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28691204/mortality-with-brainstem-seizures-from-focal-4-aminopyridine-induced-recurrent-hippocampal-seizures
#10
Muhammad Tariqus Salam, Gaspard Montandon, Roman Genov, Orrin Devinsky, Martin Del Campo, Peter L Carlen
OBJECTIVE: Sudden unexplained death in epilepsy is the leading cause of death in young adult epilepsy patients, typically occurring during the early postictal period, presumably resulting from brainstem and cardiorespiratory dysfunction. We hypothesized that ictal discharges in the brainstem disrupt the cardiorespiratory network, causing mortality. To study this hypothesis, we chose an animal model comprising focal unilateral hippocampal injection of 4-aminopyridine (4-AP), which produced focal recurrent hippocampal seizures with secondary generalization in awake, behaving rats...
July 10, 2017: Epilepsia
https://www.readbyqxmd.com/read/28687444/long-term-follow-up-for-patients-with-nonprogressive-epilepsia-partialis-continua-in-a-single-center-in-china
#11
Song Yan, Yan-Chun Deng, Xiao-Li Wang, Meng-Meng Hu, Yong-Hong Liu, Lei Ma
Epilepsia partialis continua (EPC) is a rare variant of epilepsy. Cases from China are rare. We present a case series of seven patients to analyze its clinical features, imagining findings, etiology, drug use, and long-term outcome in a single epilepsy center. We made assessments of drug effects twice (Stage I - when they left our hospital; Stage II in March 2017 - by telephone interviews to rate their long-term outcome). The mean duration of the second follow-up was 4.8years. Of the seven patients, four patients characterized motor and sensory EPC and three motor EPC...
July 4, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28681492/time-dependent-risk-of-seizures-in-critically-ill-patients-on-continuous-electroencephalogram
#12
Aaron F Struck, Gamaleldin Osman, Nishi Rampal, Siddhartha Biswal, Benjamin Legros, Lawrence J Hirsch, M Brandon Westover, Nicolas Gaspard
OBJECTIVE: Find the optimal continuous electroencephalographic (CEEG) monitoring duration for seizure detection in critically ill patients. METHODS: We analyzed prospective data from 665 consecutive CEEGs, including clinical factors and time-to-event emergence of electroencephalographic (EEG) findings over 72 hours. Clinical factors were selected using logistic regression. EEG risk factors were selected a priori. Clinical factors were used for baseline (pre-EEG) risk...
July 6, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28680515/can-patients-with-non-convulsive-seizure-be-identified-in-the-emergency-department
#13
Gholamreza Sadeghipoor Roodsari, Geetha Chari, Bryan Mera, Shahriar Zehtabchi
BACKGROUND: Non-convulsive seizure (NCS) is an underdiagnosed, potentially treatable emergency with significant mortality and morbidity. The objective of this study is to examine the characteristics of patients with NCS presenting with altered mental status (AMS) and diagnosed with electroencephalography (EEG), to identify the factors that could increase the pre-test probability of NCS. METHODS: Retrospective study using the data collected prospectively. Inclusion criteria: patients older than 13 years with AMS...
2017: World Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28680316/electroencephalographic-patterns-recorded-by-continuous-eeg-monitoring-in-patients-with-change-of-consciousness-in-the-neurological-intensive-care-unit
#14
Ebru Altindağ, Zeynep Vildan Okudan, Sedef Tavukçu Özkan, Yakup Krespi, Betül Baykan
INTRODUCTION: Our aim was to examine the frequency of various electrographic patterns including periodic discharges (PD), repetitive spike waves (RSW), rhythmic delta activities (RDA), nonconvulsive seizures (NCS) and nonconvulsive status epilepticus (NCSE) in continuous EEG monitoring (cEEG) of the critically ill patients with change of consciousness and the presence of specific clinical and laboratory findings associated with these important patterns in this study. METHODS: Patients with changes of consciousness in the neurological intensive care unit (NICU) were consecutively monitored with cEEG during 2 years...
June 2017: Noro Psikiyatri Arsivi
https://www.readbyqxmd.com/read/28676697/a-novel-3d-printed-head-phantom-with-anatomically-realistic-geometry-and-continuously-varying-skull-resistivity-distribution-for-electrical-impedance-tomography
#15
Jie Zhang, Bin Yang, Haoting Li, Feng Fu, Xuetao Shi, Xiuzhen Dong, Meng Dai
Phantom experiments are an important step for testing during the development of new hardware or imaging algorithms for head electrical impedance tomography (EIT) studies. However, due to the sophisticated anatomical geometry and complex resistivity distribution of the human head, constructing an accurate phantom for EIT research remains challenging, especially for skull modelling. In this paper, we designed and fabricated a novel head phantom with anatomically realistic geometry and continuously varying skull resistivity distribution based on 3D printing techniques...
July 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28674176/effects-of-chronic-social-defeat-stress-on-sleep-and-circadian-rhythms-are-mitigated-by-kappa-opioid-receptor-antagonism
#16
Audrey M Wells, Elysia Ridener, Clinton A Bourbonais, Woori Kim, Harry Pantazopoulos, F Ivy Carroll, Kwang-Soo Kim, Bruce M Cohen, William A Carlezon
Stress plays a critical role in the neurobiology of mood and anxiety disorders. Sleep and circadian rhythms are affected in many of these conditions. Here we examined the effects of chronic social defeat stress (CSDS), an ethological form of stress, on sleep and circadian rhythms. We exposed male mice implanted with wireless telemetry transmitters to a 10-day CSDS regimen known to produce anhedonia (a depressive-like effect) and social avoidance (an anxiety-like effect). Electroencephalography (EEG), electromyography (EMG), body temperature, and locomotor activity data were collected continuously during the CSDS regimen and a 5-day recovery period...
July 3, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28670129/stress-reactivity-and-emotion-in-premenstrual-syndrome
#17
Qing Liu, Yongshun Wang, Cornelis Hermanus van Heck, Wei Qiao
BACKGROUND: Hormone level fluctuation across the menstrual cycle causes women to experience negative emotions and also affects their mood regulation and stress sensitivity. However, the stress reactivity and emotional variations in women with premenstrual syndrome (PMS), who are especially sensitive to the variations in hormone cycles, have not been explained. METHODS: The present study used an electroencephalogram (EEG) stress evaluation test, a physiology stress evaluation test, and the positive affect and negative affect scale (PANAS) to evaluate the stress reactivity pattern and emotional state of women with PMS...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28654799/neurobehavioral-consequences-of-continuous-spike-and-waves-during-slow-sleep-csws-in-a-pediatric-population-a-pattern-of-developmental-hindrance
#18
Valentina De Giorgis, Melissa Filippini, Joyce Ann Macasaet, Silvia Masnada, Pierangelo Veggiotti
INTRODUCTION: Continuous spike and waves during slow sleep (CSWS) is a typical EEG pattern defined as diffuse, bilateral and recently also unilateral or focal localization spike-wave occurring in slow sleep or non-rapid eye movement sleep. Literature results so far point out a progressive deterioration and decline of intellectual functioning in CSWS patients, i.e. a loss of previously normally acquired skills, as well as persistent neurobehavioral disorders, beyond seizure and EEG control...
June 24, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28649016/epileptic-seizure-detection-based-on-imbalanced-classification-and-wavelet-packet-transform
#19
Qi Yuan, Weidong Zhou, Liren Zhang, Fan Zhang, Fangzhou Xu, Yan Leng, Dongmei Wei, Meina Chen
PURPOSE: Automatic seizure detection is significant for the diagnosis of epilepsy and the reduction of massive workload for reviewing continuous EEG recordings. METHODS: Compared with the long non-seizure periods, the durations of the seizure events are much shorter in the continuous EEG recordings. So the seizure detection task can be regarded as an imbalanced classification problem. In this paper, a novel method based on the weighted extreme learning machine (ELM) is proposed for seizure detection with imbalanced EEG data distribution...
June 8, 2017: Seizure: the Journal of the British Epilepsy Association
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
#20
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
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