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https://www.readbyqxmd.com/read/29774882/-sleep-wake-rhythm-after-extracorporeal-circulation-in-new-zealand-rabbits
#1
Kaiwei Wang, Jiaqiang Zhang
To evaluate the change of sleep-wake rhythm after extracorporeal circulation (ECC) in New Zealand rabbits, and to explore the role of clock genes in sleep-wake rhythm disorder by ECC.
 Methods: A total of 54 New Zealand rabbits were randomly divided into 3 groups: a normal group (Group N), a sham group (Group S) and a model group (Group ECC). Electrocorticogram (ECOG), electroophthalmogram (EOG) and electromyogram (EMG) were respectively recorded by multipurpose EEG recorder, and the sleep-wake rhythm was also recorded...
April 28, 2018: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/29768471/performance-based-approach-for-movement-artifact-removal-from-electroencephalographic-data-recorded-during-locomotion
#2
Evyatar Arad, Ronny P Bartsch, Jan W Kantelhardt, Meir Plotnik
The appreciation for the need to record electroencephalographic (EEG) signals from humans while walking has been steadily growing in recent years, particularly in relation to understanding gait disturbances. Movement artefacts (MA) in EEG signals originate from mechanical forces applied to the scalp electrodes, inducing small electrode movements relative to the scalp which, in turn, cause the recorded voltage to change irrespectively of cortical activity. These mechanical forces, and thus MA, may have various sources (e...
2018: PloS One
https://www.readbyqxmd.com/read/29767787/sleep-disordered-breathing-in-c57bl-6j-mice-with-diet-induced-obesity
#3
Thomaz Fleury Curado, Huy Pho, Slava Berger, Candela Caballero-Eraso, Mi-Kyung Shin, Luiz Ubirajara Sennes, Luu Pham, Alan R Schwartz, Vsevolod Y Polotsky
Obesity leads to sleep disordered breathing (SDB), as manifested by recurrent upper airway obstructions during sleep termed obstructive sleep apnea and carbon dioxide retention due to obesity hypoventilation. The objective of this work was to characterize breathing during sleep in C57BL6/J mice with diet-induced obesity. Arterial blood gas was measured in nine obese and nine lean mice during wakefulness. Nine male mice with diet induced obesity and six lean male C57BL/6J mice were head mounted with EEG and EMG electrodes...
May 15, 2018: Sleep
https://www.readbyqxmd.com/read/29761978/-synchronous-analysis-of-corticomuscular-coherence-based-on-gabor-wavelet-transfer-entropy
#4
Yuanyuan Zhang, Ce Zou, Xiaoling Chen, Yonghao Yin, Shengcui Cheng, Yingya Chen, Ping Xie
Synchronization analysis of electroencephalogram (EEG) and electromyogram (EMG) could reveal the functional corticomuscular coupling (FCMC) during the motor task in human. A novel method combining Gabor wavelet and transfer entropy (Gabor-TE) is proposed to quantitatively analyze the nonlinearly synchronous corticomuscular function coupling and direction characteristics under different steady-state force. Firstly, the Gabor wavelet transform method was used to acquire the local frequency-band signals of the EEG and EMG signals recorded from nine healthy controls simultaneously during performing grip task with four different steady-state forces...
December 1, 2017: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29747022/detection-of-generalized-tonic-clonic-seizures-from-ear-eeg-based-on-emg-analysis
#5
I C Zibrandtsen, P Kidmose, T W Kjaer
PURPOSE: Sudden unexpected death in epilepsy (SUDEP) is associated with generalized tonic-clonic seizures (GTCS) with most deaths occurring during sleep. Seizure detection devices have been suggested as a SUDEP prevention strategy. EMG-based GTCS detection can take advantage of the GTCS characteristic of sustained high-amplitude, high-frequency activity in the time-domain. METHOD: We present a GTCS-detection method based on median-filtered variance estimates on surface EMG measurements and describe its performance in a small exploratory proof-of-concept setting involving a group of 15 patients with 3 GTCS recorded with ear-EEG and another group of 6 patients with 11 GTCS recorded with scalp-EEG...
May 4, 2018: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29701820/cerebello-cortical-network-fingerprints-differ-between-essential-parkinson-s-and-mimicked-tremors
#6
Muthuraman Muthuraman, Jan Raethjen, Nabin Koirala, Abdul Rauf Anwar, Kidist G Mideksa, Rodger Elble, Sergiu Groppa, Günter Deuschl
Cerebello-thalamo-cortical loops play a major role in the emergence of pathological tremors and voluntary rhythmic movements. It is unclear whether these loops differ anatomically or functionally in different types of tremor. We compared age- and sex-matched groups of patients with Parkinson's disease or essential tremor and healthy controls (n = 34 per group). High-density 256-channel EEG and multi-channel EMG from extensor and flexor muscles of both wrists were recorded simultaneously while extending the hands against gravity with the forearms supported...
April 26, 2018: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29687017/the-interrelation-between-clinical-presentation-and-neurophysiology-of-posthypoxic-myoclonus
#7
Jonathan C van Zijl, Martijn Beudel, Bauke M de Jong, Joukje van der Naalt, Rodi Zutt, Fiete Lange, Walter M van den Bergh, Jan-Willem J Elting, Marina A J Tijssen
Objective: Posthypoxic myoclonus (PHM) in the first few days after resuscitation can be divided clinically into generalized and focal (uni- and multifocal) subtypes. The former is associated with a subcortical origin and poor prognosis in patients with postanoxic encephalopathy (PAE), and the latter with a cortical origin and better prognosis. However, use of PHM as prognosticator in PAE is hampered by the modest objectivity in its clinical assessment. Therefore, we aimed to obtain the anatomical origin of PHM with use of neurophysiological investigations, and relate these to its clinical presentation...
April 2018: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29684437/sleep-dysfunction-following-neonatal-ischemic-seizures-are-differential-by-neonatal-age-of-insult-as-determined-by-qeeg-in-a-mouse-model
#8
S K Kang, S Ammanuel, S Thodupunuri, D A Adler, M V Johnston, S D Kadam
Neonatal seizures associated with hypoxic-ischemic encephalopathy (HIE) pose a challenge in their acute clinical management and are often followed by long-term neurological consequences. We used a newly characterized CD-1 mouse model of neonatal ischemic seizures associated with age-dependent (P7 vs. P10) seizure severity and phenobarbital efficacy (i.e.; PB-resistant vs. PB-efficacious respectively) following unilateral carotid ligation. The long-term consequences following untreated neonatal seizures in P7 vs...
April 20, 2018: Neurobiology of Disease
https://www.readbyqxmd.com/read/29672545/epileptiform-activity-during-inert-gas-euthanasia-of-mice
#9
Thomas C Gent, Carlotta Detotto, Alexei L Vyssotski, Regula Bettschart-Wolfensberger
Carbon dioxide (CO2) is one of the most commonly used euthanasia agents for mice, yet it is highly aversive and nociceptive. Inert gases are a possible alternative, however there are qualitative reports of seizures resulting from exposure. Here we evaluate epileptiform activity caused by inert gases (N2, He, Ar and Xe) and CO2 in mice chronically instrumented for EEG/EMG undergoing single-gas euthanasia. We found that N2, He and Ar caused epileptiform activity in all animals, CO2 in half of animals and no epileptiform activity produced by Xe...
2018: PloS One
https://www.readbyqxmd.com/read/29652835/fabrication-of-flexible-microneedle-array-electrodes-for-wearable-bio-signal-recording
#10
Lei Ren, Shujia Xu, Jie Gao, Zi Lin, Zhipeng Chen, Bin Liu, Liang Liang, Lelun Jiang
Laser-direct writing (LDW) and magneto-rheological drawing lithography (MRDL) have been proposed for the fabrication of a flexible microneedle array electrode (MAE) for wearable bio-signal monitoring. Conductive patterns were directly written onto the flexible polyethylene terephthalate (PET) substrate by LDW. The microneedle array was rapidly drawn and formed from the droplets of curable magnetorheological fluid with the assistance of an external magnetic field by MRDL. A flexible MAE can maintain a stable contact interface with curved human skin due to the flexibility of the PET substrate...
April 13, 2018: Sensors
https://www.readbyqxmd.com/read/29623876/averaging-in-time-frequency-domain-reveals-the-temporal-and-spatial-extent-of-seizures-recorded-by-scalp-eeg
#11
Rafeed Alkawadri, Nicolas Gaspard
To demonstrate the importance of averaging in time-frequency space and the added localizing value in time and space in a case of cortical myoclonus. One hundred myoclonic jerks were averaged in time series and in spectral domain. For the latter, we chose 100 (10-second) segments from interictal background and used the unpaired t-test for the jerk-related and control spectral data to obtain the t value and corresponding p value at each pixel. We corrected for multiple comparisons using false discovery rate procedure...
April 6, 2018: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/29617219/mu-oscillations-changes-related-to-the-development-of-anticipatory-postural-control-in-children-and-adolescents
#12
Fanny Barlaam, Carole Fortin, Marianne Vaugoyeau, Christina Schmitz, Christine Assaiante
Anticipatory postural Adjustments (APAs) cancel the destabilizing effects of movement on posture. Across development, the maturation of APAs is characterized by an accurate adjustment of the timing parameters of electromyographic (EMG) response. The study aimed at investigating the maturation of cortical oscillations involved in the improvement of APAs efficiency. Thirty-six healthy participants (8-16 years) performed the bimanual load-lifting task in which subjects are instructed to lift a load, placed on the left forearm, with the right hand...
April 4, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29605618/progressive-myoclonus-epilepsy-without-renal-failure-in-a-chinese-family-with-a-novel-mutation-in-scarb2-gene-and-literature-review
#13
Wo-Tu Tian, Xiao-Li Liu, Yang-Qi Xu, Xiao-Jun Huang, Hai-Yan Zhou, Ying Wang, Hui-Dong Tang, Sheng-Di Chen, Xing-Hua Luan, Li Cao
PURPOSE: To describe the clinical and genetic features of a Chinese progressive myoclonus epilepsy (PME) patient related with SCARB2 mutation without renal impairment and review 27 SCARB2-related PME patients from 11 countries. METHODS: The patient was a 27-year-old man with progressive action myoclonus, ataxia, epilepsy, dysarthria and absence of cognitive deterioration. Renal functional test was normal. Electroencephalography (EEG) showed progressively slowed background activity and sporadic generalized spike-and-wave discharges...
March 14, 2018: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29582150/evaluation-of-artifact-corrected-electroencephalographic-eeg-training-a-pilot-study
#14
Jeffry P La Marca, Daniel Cruz, Jennifer Fandino, Fabiana R Cacciaguerra, Joseph J Fresco, Austin T Guerra
This double-blind study examined the effect of electromyographical (EMG) artifacts, which contaminate electroencephalographical (EEG) signals, by comparing artifact-corrected (AC) and non-artifact-corrected (NAC) neurofeedback (NF) training procedures. 14 unmedicated college students were randomly assigned to two groups: AC (n = 7) or NAC (n = 7). Both groups received 12 sessions of NF and were trained using identical NF treatment protocols to reduce their theta/beta power ratios (TBPR). Outcomes on a continuous performance test revealed that the AC group had statistically significant increases across measures of auditory and visual attention...
March 26, 2018: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29570069/a-two-wired-ultra-high-input-impedance-active-electrode
#15
Federico Nicolas Guerrero, Enrique Mario Spinelli
This paper presents a novel two-wired active electrode that achieves ultrahigh input impedance using power supply bootstrapping. The proposed circuit reduces the input capacitance of a buffer amplifier while enabling measurements using leads with only two wires, providing a low-complexity and low-cost solution for interference rejection and artifact reduction in dc-coupled dry-contact biopotential measurements. An implemented prototype shows that, even using standard operational amplifiers, an input capacitance as low as 71 fF can be obtained, maintaining a high impedance in a 0-1 kHz bandwidth, sufficient for ECG, EEG, and EMG measurements...
April 2018: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/29555428/acute-cardiovascular-exercise-promotes-functional-changes-in-cortico-motor-networks-during-the-early-stages-of-motor-memory-consolidation
#16
Fabien Dal Maso, Bennet Desormeau, Marie-Hélène Boudrias, Marc Roig
A single bout of cardiovascular exercise performed immediately after practicing a visuo-motor tracking task has been shown to improve the long-term retention of this motor skill through an optimization of the memory consolidation process. The mechanisms underlying the time-dependent effects of acute cardiovascular exercise on motor memory consolidation, however, remain poorly understood. In this study, we sought to determine the impact of a single bout of cardiovascular exercise performed immediately after motor skill practice on those mechanisms using electroencephalography (EEG) and electromyography (EMG)...
March 16, 2018: NeuroImage
https://www.readbyqxmd.com/read/29535995/assessing-brain-muscle-connectivity-in-human-locomotion-through-mobile-brain-body-imaging-opportunities-pitfalls-and-future-directions
#17
Federico Gennaro, Eling D de Bruin
Assessment of the cortical role during bipedalism has been a methodological challenge. While surface electroencephalography (EEG) is capable of non-invasively measuring cortical activity during human locomotion, it is associated with movement artifacts obscuring cerebral sources of activity. Recently, statistical methods based on blind source separation revealed potential for resolving this issue, by segregating non-cerebral/artifactual from cerebral sources of activity. This step marked a new opportunity for the investigation of the brains' role while moving and was tagged mobile brain/body imaging (MoBI)...
2018: Frontiers in Public Health
https://www.readbyqxmd.com/read/29529528/investigating-the-contribution-of-distance-based-features-to-automatic-sleep-stage-classification
#18
Ali Abdollahi Gharbali, Shirin Najdi, José Manuel Fonseca
OBJECTIVE: In this paper, the contribution of distance-based features to automatic sleep stage classification is investigated. The potency of these features is analyzed individually and in combination with 48 conventionally used features. METHODS: The distance-based set consists of 32 features extracted by calculating Itakura, Itakura-Saito and COSH distances of autoregressive and spectral coefficients of Electrocardiography (EEG) (C3 -A2 ), Left EOG, Chin EMG and ECG signals...
May 1, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29504573/performance-control-in-one-consecutive-motor-task-sequence-%C3%AE-pproaching-central-neuronal-motor-behaviour-preceding-isometric-contraction-onsets-and-relaxation-offsets-at-lower-distinct-torques
#19
Tobias Vogt, Kouki Kato, Nils Flüthmann, Oliver Bloch, Hiroki Nakata, Kazuyuki Kanosue
OBJECTIVE: Motor-related cortical potentials (MRCP) often compared separated muscle activations; however, MRCP preceding combined contraction onsets and relaxation offsets of one consecutive motor task sequence remain to be elucidated. METHODS: Twelve healthy males (27.92±4.33 years, 181.83±7.15 cm, 84.58±7.15 kg) performed 40 submaximal isometric right-limb wrist flexions (i.e. motor task sequences). Each motor task sequence combined timed contractions to and relaxations from distinct torque levels, i...
March 1, 2018: Journal of Musculoskeletal & Neuronal Interactions
https://www.readbyqxmd.com/read/29501756/antagonism-of-corticotropin-releasing-factor-in-the-basolateral-amygdala-of-resilient-and-vulnerable-rats-effects-on-fear-conditioned-sleep-temperature-and-freezing
#20
Laurie L Wellman, Mairen E Fitzpatrick, Amy M Sutton, Brook L Williams, Mayumi Machida, Larry D Sanford
The basolateral nucleus of the amygdala (BLA) plays a significant role in mediating individual differences in the effects of fear memory on sleep. Here, we assessed the effects of antagonizing corticotropin releasing factor receptor 1 (CRFR1) after shock training (ST) on fear-conditioned behaviors and sleep. Outbred Wistar rats were surgically implanted with electrodes for recording EEG and EMG and with bilateral guide cannulae directed at BLA. Data loggers were placed intraperitoneally to record core body temperature...
April 2018: Hormones and Behavior
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