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https://www.readbyqxmd.com/read/29129160/visual-but-not-motor-processes-predict-simple-visuomotor-reaction-time-of-badminton-players
#1
Thorben Hülsdünker, Heiko K Strüder, Andreas Mierau
The athlete's brain exhibits significant functional adaptations that facilitate visuomotor reaction performance. However, it is currently unclear if the same neurophysiological processes that differentiate athletes from non-athletes also determine performance within a homogeneous group of athletes. This information can provide valuable help for athletes and coaches aiming to optimize existing training regimes. Therefore, this study aimed to identify the neurophysiological correlates of visuomotor reaction performance in a group of skilled athletes...
November 12, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29111113/understanding-the-relationship-between-brain-and-upper-limb-function-in-children-with-unilateral-motor-impairments-a-multimodal-approach
#2
Maya Weinstein, Dido Green, Julian Rudisch, Ingar M Zielinski, Marta Benthem-Muñiz, Marijtje L A Jongsma, Verity McClelland, Bert Steenbergen, Shelly Shiran, Dafna Ben Bashat, Gareth J Barker
Atypical brain development and early brain injury have profound and long lasting impact on the development, skill acquisition, and subsequent independence of a child. Heterogeneity is present at the brain level and at the motor level; particularly with respect to phenomena of bilateral activation and mirrored movements (MMs). In this multiple case study we consider the feasibility of using several modalities to explore the relationship between brain structure and/or activity and hand function: Electroencephalography (EEG), both structural and functional Magnetic Resonance Imaging (sMRI, fMRI), diffusion tensor imaging (DTI), transcranial magnetic stimulation (TMS), Electromyography (EMG) and hand function assessments...
October 12, 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/29101844/early-corticospinal-tract-damage-in-prodromal-sca2-revealed-by-eeg-emg-and-emg-emg-coherence
#3
Luis Velázquez-Pérez, Johannes Tünnerhoff, Roberto Rodríguez-Labrada, Reidenis Torres-Vega, Yusely Ruiz-Gonzalez, Paolo Belardinelli, Jacqueline Medrano-Montero, Nalia Canales-Ochoa, Yanetza González-Zaldivar, Yaimeé Vazquez-Mojena, Georg Auburger, Ulf Ziemann
OBJECTIVE: Clinical data suggest early involvement of the corticospinal tract (CST) in spinocerebellar ataxia type 2 (SCA2). Here we tested if early CST degeneration can be detected in prodromal SCA2 mutation carriers by electrophysiological markers of CST integrity. METHODS: CST integrity was tested in 15 prodromal SCA2 mutation carriers, 19 SCA2 patients and 25 age-matched healthy controls, using corticomuscular (EEG-EMG) and intermuscular (EMG-EMG) coherence measures in upper and lower limb muscles...
October 20, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29096215/intermittent-theta-burst-stimulation-induces-correlated-changes-in-cortical-and-corticospinal-excitability-in-healthy-older-subjects
#4
Tamara Gedankien, Peter J Fried, Alvaro Pascual-Leone, Mouhsin M Shafi
OBJECTIVE: We studied the correlation between motor evoked potentials (MEPs) and early TMS-evoked EEG potentials (TEPs) from single-pulse TMS before and after intermittent Theta Burst Stimulation (iTBS) to the left primary motor cortex (M1) in 17 healthy older participants. METHODS: TMS was targeted to the hand region of M1 using a MRI-guided navigated brain stimulation system and a figure-of-eight biphasic coil. MEPs were recorded from the right first dorsal interosseous muscle using surface EMG...
September 28, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29093287/stilbene-glucoside-a-putative-sleep-promoting-constituent-from-polygonum-multiflorum-affects-sleep-homeostasis-by-affecting-the-activities-of-lactate-dehydrogenase-and-salivary-alpha-amylase
#5
Qian Wei, Guang Ta, Wenjing He, Wei Wang, Qiucheng Wu
Chinese herbal medicine (CHM) has been used for treating insomnia for centuries. The most used CHM for insomnia was Polygonum multiflorum. However, the molecular mechanism for CHM preventing insomnia is unknown. Stilbene glucoside (THSG), an important active component of P. multiflorum, may play an important role for treating insomnia. To test the hypothesis, Kunming mice were treated with different dosages of THSG. To examine the sleep duration, a computer-controlled sleep-wake detection system was implemented...
2017: Chemical & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29080913/towards-efficient-decoding-of-multiple-classes-of-motor-imagery-limb-movements-based-on-eeg-spectral-and-time-domain-descriptors
#6
Oluwarotimi Williams Samuel, Yanjuan Geng, Xiangxin Li, Guanglin Li
To control multiple degrees of freedom (MDoF) upper limb prostheses, pattern recognition (PR) of electromyogram (EMG) signals has been successfully applied. This technique requires amputees to provide sufficient EMG signals to decode their limb movement intentions (LMIs). However, amputees with neuromuscular disorder/high level amputation often cannot provide sufficient EMG control signals, and thus the applicability of the EMG-PR technique is limited especially to this category of amputees. As an alternative approach, electroencephalograph (EEG) signals recorded non-invasively from the brain have been utilized to decode the LMIs of humans...
October 28, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/29060736/a-low-power-low-noise-programmable-analog-front-end-pafe-for-biopotential-measurements
#7
Mahesh Kumar Adimulam, A Divya, K Tejaswi, M B Srinivas
A low power Programmable Analog Front End (PAFE) for biopotential measurements is presented in this paper. The PAFE circuit processes electrocardiogram (ECG), electromyography (EMG) and electroencephalogram (EEG) signals with higher accuracy. It consists mainly of improved transconductance programmable gain instrumentational amplifier (PGIA), programmable high pass filter (PHPF), and second order low pass filter (SLPF). A 15-bit programmable 5-stage successive approximation analog-to-digital converter (SAR-ADC) is implemented for improving the performance, whose power consumption is reduced due to multiple stages and by OTA/Comparator sharing technique between the stages...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060411/influence-of-trans-spinal-magnetic-stimulation-in-electrophysiological-recordings-for-closed-loop-rehabilitative-systems
#8
Ainhoa Insausti-Delgado, Eduardo Lopez-Larraz, Carlos Bibian, Yukio Nishimura, Niels Birbaumer, Ander Ramos-Murguialday
Recent studies have shown the feasibility of spinal cord stimulation (SCS) for motor rehabilitation. Currently, there is an increasing interest in developing closed-loop systems employing SCS for lower-limb recovery. These closed-loop systems are based on the use of neurophysiological signals to modulate the stimulation. It is known that electromagnetic stimulation can introduce undesirable noise to the electrophysiological recordings. However, there is little evidence about how electroencephalographic (EEG) or electromyographic (EMG) activities are corrupted when a trans-spinal magnetic stimulation is applied...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060386/experimental-characterization-and-analysis-of-the-bitalino-platforms-against-a-reference-device
#9
Diana Batista, Hugo Silva, Ana Fred
Low-cost hardware platforms for biomedical engineering are becoming increasingly available, which empower the research community in the development of new projects in a wide range of areas related with physiological data acquisition. Building upon previous work by our group, this work compares the quality of the data acquired by means of two different versions of the multimodal physiological computing platform BITalino, with a device that can be considered a reference. We acquired data from 5 sensors, namely Accelerometry (ACC), Electrocardiography (ECG), Electroencephalography (EEG), Electrodermal Activity (EDA) and Electromyography (EMG)...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060047/facial-expression-classification-using-eeg-and-gyroscope-signals
#10
Jake Toth, Mahnaz Arvaneh
In this paper muscle and gyroscope signals provided by a low cost EEG headset were used to classify six different facial expressions. Muscle activities generated by facial expressions are seen in EEG data recorded from scalp. Using the already present EEG device to classify facial expressions allows for a new hybrid brain-computer interface (BCI) system without introducing new hardware such as separate electromyography (EMG) electrodes. To classify facial expressions, time domain and frequency domain EEG data with different sampling rates were used as inputs of the classifiers...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29055454/spontaneous-yawning-in-patients-with-multiple-sclerosis-a-polygraphic-study
#11
Hülya Uluğut Erkoyun, Yeşim Beckmann, Nazlı Gamze Bülbül, Tülay Kurt İncesu, Nevin Gürgör Kanat, Cumhur Ertekin
BACKGROUND: Patients with multiple sclerosis (MS) suffer from the repetitive yawning and sleep problems. Yawning is observed in MS and other central nervous system disorders and yawning and swallowing may be controlled by the network of the brain stem. Therefore it is important to investigate the MS patients with various clinical and radiological locations in order to understand the role of brainstem on the yawning mechanisms. One hour polygraphic recording would be crucial method for this purpose, because it is easy to observe spontaneous yawning (SY) and spontaneous swallowing (SS) together with their electrophysiologic counterparts...
October 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29029284/the-influence-of-co2-on-genioglossus-muscle-after-discharge-following-arousal-from-sleep-hypocapnia-and-genioglossus-muscle-after-discharge
#12
Jennifer M Cori, Peter D Rochford, Fergal J O'Donoghue, John Trinder, Amy S Jordan
Objectives: Ventilatory after-discharge (sustained elevation of ventilation following stimulus removal), occurs during sleep but not when hypocapnia is present. Genioglossus after-discharge also occurs during sleep, but CO2 effects have not been assessed. The relevance is that post-arousal after-discharge may protect against upper airway collapse. This study aimed to determine whether arousal elicits genioglossus after-discharge that persists into sleep, and whether it is influenced by CO2...
October 6, 2017: Sleep
https://www.readbyqxmd.com/read/28987993/corticomuscular-coherence-in-the-acute-and-subacute-phase-after-stroke
#13
Lisbeth Hoejkjaer Larsen, Ivan Chrilles Zibrandtsen, Troels Wienecke, Troels Wesenberg Kjaer, Mark Schram Christensen, Jens Bo Nielsen, Henning Langberg
OBJECTIVE: Stroke is one of the leading causes of physical disability due to damage of the motor cortex or the corticospinal tract. In the present study we set out to investigate the role of adaptations in the corticospinal pathway for motor recovery during the subacute phase after stroke. METHODS: We examined 19 patients with clinically diagnosed stroke and 18 controls. The patients had unilateral mild to moderate weakness of the hand. Each patient attended two sessions at approximately 3days (acute) and 38days post stroke (subacute)...
September 22, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28984294/perinatal-immune-activation-produces-persistent-sleep-alterations-and-epileptiform-activity-in-male-mice
#14
Galen Missig, Emery L Mokler, James O Robbins, Abigail J Alexander, Christopher J McDougle, William A Carlezon
Increasing evidence suggests a role for inflammation in neuropsychiatric conditions including autism spectrum disorder (ASD). Previous work in rodents has established that immune activation during critical developmental periods can cause phenotypes that reproduce core features of ASD, including decreased social interaction, aberrant communication, and increased repetitive behavior. In humans, ASD is frequently associated with co-morbid medical conditions including sleep disorders, motor hyperactivity, and seizures...
October 6, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28958035/sleep-wake-physiology-and-quantitative-eeg-analysis-of-the-neuroligin-3-knockout-rat-model-of-autism-spectrum-disorder
#15
Alexia M Thomas, Michael D Schwartz, Michael D Saxe, Thomas S Kilduff
Study Objectives: Neuroligin-3 (NLGN3) is one of many genes associated with autism spectrum disorder (ASD). Sleep dysfunction is highly prevalent in ASD, but has not been rigorously examined in ASD models. Here, we evaluated sleep/wake physiology and behavioral phenotypes of rats with genetic ablation of Nlgn3. Methods: Male Nlgn3 knockout (KO) and wild-type (WT) rats were assessed using a test battery for ASD-related behaviors and also implanted with telemeters to record the electroencephalogram (EEG), electromyogram (EMG), body temperature, and locomotor activity...
August 31, 2017: Sleep
https://www.readbyqxmd.com/read/28921744/cholinergic-basal-forebrain-structures-are-not-essential-for-mediation-of-the-arousing-action-of-glutamate
#16
Zoltán Lelkes, Shamsiiat Abdurakhmanova, Tarja Porkka-Heiskanen
The cholinergic basal forebrain contributes to cortical activation and receives rich innervations from the ascending activating system. It is involved in the mediation of the arousing actions of noradrenaline and histamine. Glutamatergic stimulation in the basal forebrain results in cortical acetylcholine release and suppression of sleep. However, it is not known to what extent the cholinergic versus non-cholinergic basal forebrain projection neurones contribute to the arousing action of glutamate. To clarify this question, we administered N-methyl-D-aspartate (NMDA), a glutamate agonist, into the basal forebrain in intact rats and after destruction of the cholinergic cells in the basal forebrain with 192 immunoglobulin (Ig)G-saporin...
September 18, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28912724/abnormalities-in-the-polysomnographic-adenosine-and-metabolic-response-to-sleep-deprivation-in-an-animal-model-of-hyperammonemia
#17
Selena Marini, Olena Santangeli, Pirjo Saarelainen, Benita Middleton, Namrata Chowdhury, Debra J Skene, Rodolfo Costa, Tarja Porkka-Heiskanen, Sara Montagnese
Patients with liver cirrhosis can develop hyperammonemia and hepatic encephalopathy (HE), accompanied by pronounced daytime sleepiness. Previous studies with healthy volunteers show that experimental increase in blood ammonium levels increases sleepiness and slows the waking electroencephalogram. As ammonium increases adenosine levels in vitro, and adenosine is a known regulator of sleep/wake homeostasis, we hypothesized that the sleepiness-inducing effect of ammonium is mediated by adenosine. Eight adult male Wistar rats were fed with an ammonium-enriched diet for 4 weeks; eight rats on standard diet served as controls...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28893295/a-brain-computer-interface-driven-by-imagining-different-force-loads-on-a-single-hand-an-online-feasibility-study
#18
Kun Wang, Zhongpeng Wang, Yi Guo, Feng He, Hongzhi Qi, Minpeng Xu, Dong Ming
BACKGROUND: Motor imagery (MI) induced EEG patterns are widely used as control signals for brain-computer interfaces (BCIs). Kinetic and kinematic factors have been proved to be able to change EEG patterns during motor execution and motor imagery. However, to our knowledge, there is still no literature reporting an effective online MI-BCI using kinetic factor regulated EEG oscillations. This study proposed a novel MI-BCI paradigm in which users can online output multiple commands by imagining clenching their right hand with different force loads...
September 11, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28887545/human-to-human-closed-loop-control-based-on-brain-to-brain-interface-and-muscle-to-muscle-interface
#19
M Ebrahim M Mashat, Guangye Li, Dingguo Zhang
Novel communication techniques have always been fascinating for humankind. This pilot study presents an approach to human interaction by combining direct brain-to-brain interface (BBI) and muscle-to-muscle interface (MMI) in a closed-loop pattern. In this system, artificial paths (data flows) functionally connect natural paths (nerves). The intention from one subject (sender) is recognized using electroencephalography (EEG) based brain-computer interface (BCI), which is sent out to trigger transcranial magnetic stimulation (TMS) on the other subject (receiver) and induce hand motion; meanwhile TMS results in a significant change on the motor evoked potentials (MEP) recorded by electromyography (EMG) of the receiver's arm, which triggers functional electrical stimulation (FES) applied to the sender's arm and generates hand motion...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28883745/review-of-devices-used-in-neuromuscular-electrical-stimulation-for-stroke-rehabilitation
#20
REVIEW
Kotaro Takeda, Genichi Tanino, Hiroyuki Miyasaka
Neuromuscular electrical stimulation (NMES), specifically functional electrical stimulation (FES) that compensates for voluntary motion, and therapeutic electrical stimulation (TES) aimed at muscle strengthening and recovery from paralysis are widely used in stroke rehabilitation. The electrical stimulation of muscle contraction should be synchronized with intended motion to restore paralysis. Therefore, NMES devices, which monitor electromyogram (EMG) or electroencephalogram (EEG) changes with motor intention and use them as a trigger, have been developed...
2017: Medical Devices: Evidence and Research
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