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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/29770208/case-report-polyarteritis-nodosa-or-complicated-henoch-schonlein-purpura-a-rare-case
#2
Sajad Hasanzadeh, Seyedeh Maryam Alavi, Elahe Masnavi, Maryam Rohani, Saeid Jokar
Background: Polyarteritis nodosa (PAN) is a vasculitis that affects medium sized arteries. PAN is a rare disease and requires a high vilgilance for diagnosis. For instance, PAN and Henoch-Schonlein purpura (HSP) have narrowing differential diagnosis. Here, we report a case of PAN. Case presentation : Our patient was a 65 year old woman that came to hospital due to abdominal pain and skin lesion on the right upper and right lower extremities. All rheumatologic tests were negative. A biopsy of the skin lesion was reported as mild hyperkeratosis, slight spongiosis with intact basal layer...
2018: F1000Research
https://www.readbyqxmd.com/read/29768106/effect-of-oral-baclofen-on-spasticity-poststroke-responders-versus-non-responders
#3
Shiho Mizuno, Kotaro Takeda, Shinichiro Maeshima, Sonoda Shigeru
Objective To assess quantitatively the efficacy of oral baclofen for spasticity poststroke. Methods The participants were 29 persons poststroke with increased resistance to passive ankle dorsiflexion and ankle clonus on clinical assessment. Baclofen was administered at 20 mg/day for 1 week. The ankle joint was passively dorsiflexed at either 5°/s (slow stretch) or 90°/s (fast stretch) by a custom-built device. The ankle joint angle and resistive torque were measured during the ramp-and-hold stretch, with gastrocnemius electromyogram...
May 16, 2018: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/29765351/multiscale-information-transfer-in-functional-corticomuscular-coupling-estimation-following-stroke-a-pilot-study
#4
Xiaoling Chen, Ping Xie, Yuanyuan Zhang, Yuling Chen, Fangmei Yang, Litai Zhang, Xiaoli Li
Recently, functional corticomuscular coupling (FCMC) between the cortex and the contralateral muscle has been used to evaluate motor function after stroke. As we know, the motor-control system is a closed-loop system that is regulated by complex self-regulating and interactive mechanisms which operate in multiple spatial and temporal scales. Multiscale analysis can represent the inherent complexity. However, previous studies in FCMC for stroke patients mainly focused on the coupling strength in single-time scale, without considering the changes of the inherently directional and multiscale properties in sensorimotor systems...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29765184/the-effect-of-respiratory-exercise-on-trunk-control-pulmonary-function-and-trunk-muscle-activity-in-chronic-stroke-patients
#5
Dong-Kyu Lee, Se-Hun Kim
[Purpose] This study aims to identify the effect of respiratory exercise on trunk control, pulmonary function, and trunk muscle activity in chronic stroke patients. [Subjects and Methods] The study included 24 chronic stroke patients who were randomly assigned, 12 each, to the experimental and control groups, and received neurodevelopmental treatment. Moreover, the experimental group underwent respiratory exercise. In each patient, the trunk control was measured using the Trunk Impairment Scale (TIS); muscle activity of the trunk, through the surface electromyogram; and pulmonary function, using the pneumatometer...
May 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29761978/-synchronous-analysis-of-corticomuscular-coherence-based-on-gabor-wavelet-transfer-entropy
#6
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/29750662/supplemental-carbon-dioxide-stabilizes-the-upper-airway-in-volunteers-anesthetized-with-propofol
#7
Katarina Jennifer Ruscic, Janne Bøgh Stokholm, Johann Patlak, Hao Deng, Jeroen Cedric Peter Simons, Timothy Houle, Jürgen Peters, Matthias Eikermann
BACKGROUND: Propofol impairs upper airway dilator muscle tone and increases upper airway collapsibility. Preclinical studies show that carbon dioxide decreases propofol-mediated respiratory depression. We studied whether elevation of end-tidal carbon dioxide (PETCO2) via carbon dioxide insufflation reverses the airway collapsibility (primary hypothesis) and impaired genioglossus muscle electromyogram that accompany propofol anesthesia. METHODS: We present a prespecified, secondary analysis of previously published experiments in 12 volunteers breathing via a high-flow respiratory circuit used to control upper airway pressure under propofol anesthesia at two levels, with the deep level titrated to suppression of motor response...
May 10, 2018: Anesthesiology
https://www.readbyqxmd.com/read/29746498/modulation-of-plantar-pressure-and-gastrocnemius-activity-during-gait-using-electrical-stimulation-of-the-tibialis-anterior-in-healthy-adults
#8
Maiki Moriguchi, Noriaki Maeshige, Mizuki Ueno, Yoshiyuki Yoshikawa, Hiroto Terashi, Hidemi Fujino
High plantar flexor moment during the stance phase is known to cause high plantar pressure under the forefoot; however, the effects on plantar pressure due to a change of gastrocnemius medialis (GM) activity during gait, have not been investigated to date. Reciprocal inhibition is one of the effects of electrical stimulation (ES), and is the automatic antagonist alpha motor neuron inhibition which is evoked by excitation of the agonist muscle. The aim of this study was to investigate the influences of ES of the tibialis anterior (TA) on plantar pressure and the GM activity during gait in healthy adults...
2018: PloS One
https://www.readbyqxmd.com/read/29746219/feasibility-of-continuous-intraoperative-neural-monitoring-during-transoral-endoscopic-thyroidectomy-vestibular-approach-in-a-porcine-model
#9
Daqi Zhang, Shijie Li, Gianlorenzo Dionigi, Tie Wang, Jiao Zhang, Gaofeng Xue, Hui Sun
BACKGROUND: Experimental study to evaluate feasibility of continuous intraoperative neural monitoring (C-IONM) in transoral endoscopic thyroidectomy vestibular approach (TOETVA). METHODS: Duroc-Landrace pigs were orally intubated with electromyogram endotracheal tube. Automatic periodic stimulation (APS) electrode was allocated in the operative field through the 5-mm ports. APS was then repose on vagal nerve (VN) with different approaches: (1) median, that is, between sternothyroid and thyroid gland; and (2) lateral, that is, between sternocleidomastoid and sternothyroid...
May 10, 2018: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/29744809/identification-of-a-feature-selection-based-pattern-recognition-scheme-for-finger-movement-recognition-from-multichannel-emg-signals
#10
Geethanjali Purushothaman, Raunak Vikas
This paper focuses on identification of an effective pattern recognition scheme with the least number of time domain features for dexterous control of prosthetic hand to recognize the various finger movements from surface electromyogram (EMG) signals. Eight channels EMG from 8 able-bodied subjects for 15 individuals and combined finger activities have been considered in this work. In this work, an attempt has been made to recognize a number of classes with the least number of features. Therefore, EMG signals are pre-processed using dual tree complex wavelet transform to improve the discriminating capability of features and time domain features such as zero crossing, slope sign change, mean absolute value, and waveform length is extracted from the pre-processed data...
May 9, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29736393/relationship-between-isometric-muscle-force-and-fractal-dimension-of-surface-electromyogram
#11
Matteo Beretta-Piccoli, Gennaro Boccia, Tessa Ponti, Ron Clijsen, Marco Barbero, Corrado Cescon
The relationship between fractal dimension of the surface electromyogram (sEMG) and the intensity of muscle contraction is still controversial in simulated and experimental conditions. To support the use of fractal analysis to investigate myoelectric fatigue, it is crucial to establish the interdependence between fractal dimension and muscle contraction intensity. We analyzed the behavior of fractal dimension, conduction velocity, mean frequency, and average rectified value in twenty-eight volunteers at nine levels of isometric force...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29735161/the-ipswich-microbreak-technique-to-alleviate-neck-and-shoulder-discomfort-during-microscopic-procedures
#12
Ananth Vijendren, Gavin Devereux, Aaron Tietjen, Kathy Duffield, Vincent Van Rompaey, Paul Van de Heyning, Matthew Yung
Neck and shoulder disorders are a considerable health problem amongst frequent microscope users. We aimed to investigate the neck and shoulder discomfort experienced during prolonged microscopic activity and to assess the benefits of minibreaks. A prospective crossover study was performed on 17 healthy volunteers sitting still while looking down a bench with and without the Ipswich Microbreak Technique (IMT). We used a subjective measure of time to fatigue and pain in the neck and shoulder regions as well as objective readings from a surface electromyogram (sEMG)...
May 4, 2018: Applied Ergonomics
https://www.readbyqxmd.com/read/29734983/the-effects-of-experimental-sleep-fragmentation-and-sleep-deprivation-on-the-response-of-the-genioglossus-muscle-to-inspiratory-resistive-loads
#13
Jennifer M Cori, Christian L Nicholas, Joanne Avraam, V Vien Lee, Rachel Schembri, Melinda L Jackson, Amy S Jordan
STUDY OBJECTIVES: Poor upper airway dilator muscle function may contribute to obstructive sleep apnea (OSA). Sleep deprivation reduces dilator muscle responsiveness, but sleep fragmentation, which is most characteristic of OSA, has not been assessed. This study compared the effects of sleep deprivation and fragmentation on dilator muscle responsiveness during wakefulness. METHOD: Twenty-four healthy individuals (10 female) participated in two consecutive overnight polysomnography (PSG) sessions...
April 30, 2018: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/29710025/-a-survivor-of-hodgkin-lymphoma-manifesting-dropped-head-syndrome-as-a-late-onset-complication-of-radiotherapy-a-case-report
#14
Misako Kaido, Yoshihito Yuasa, Hiroshi Ikeda
We report the case of a 50-year-old female survivor of Hodgkin lymphoma (HL), who developed dropped head syndrome (DHS). The patient was diagnosed with HL at 20 years of age, and underwent chemo-radiotherapy, which led to complete remission. Undergoing supplemental therapy for post-radiation hypothyroidism, she had twin babies. She noticed white stains on her neck at the age of 30, and the decolored area gradually expanded. Sixteen years after the radiotherapy (RT), her posterior neck muscle strength began to decline...
April 28, 2018: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/29698877/higher-torque-and-muscle-fibre-conduction-velocity-of-the-biceps-brachii-in-karate-practitioners-during-isokinetic-contractions
#15
Federico Quinzi, Andrea Bianchetti, Francesco Felici, Paola Sbriccoli
PURPOSE: Although upper limb techniques are largely utilized during karate combat competitions scarce information regarding their NM control is available. This study aims at investigating the effect of karate practice on the NM control of Biceps and Triceps Brachii during isokinetic contractions to enhance current knowledge on neuromuscular control adaptations and training methodologies in combat sports. METHODS: Torque and surface electromyograms (sEMG) of Biceps Brachii Caput Longum (BB) and Triceps Brachii Lateral Head (TB) were recorded in eight karate practitioners (KA) and eight age-matched sedentary individuals (CO) during isokinetic elbow flexion-extensions (0-240°/s-1 )...
April 17, 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29696675/anodal-and-cathodal-transcranial-direct-current-stimulation-can-decrease-force-output-of-knee-extensors-during-an-intermittent-mvc-fatiguing-task-in-young-healthy-male-participants
#16
Louis-Solal Giboin, Markus Gruber
Transcranial direct current stimulation (tDCS) has the capacity to enhance force output during a short-lasting maximal voluntary contraction (MVC) as well as during a long-lasting submaximal voluntary contraction until task failure. However, its effect on an intermittent maximal effort is not known. We hypothesized that anodal tDCS applied during or before a maximal fatigue task increases the amplitude of maximal voluntary contraction (aMVC) and voluntary activation (VA) in young healthy male participants. We measured VA, potentiated twitch at rest (Ptw), root mean square electromyogram (EMG), and aMVC during a fatiguing task that consisted of 35 × 5 s MVC of knee extensors and was performed during tDCS or 10 min after the end of tDCS (sham, anodal, or cathodal treatments)...
April 26, 2018: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29695101/triphlorethol-a-a-dietary-polyphenol-from-seaweed-decreases-sleep-latency-and-increases-non-rapid-eye-movement-sleep-in-mice
#17
Minseok Yoon, Suengmok Cho
In our previous studies, we have demonstrated that marine polyphenol phlorotannins promote sleep through the benzodiazepine site of the gamma-aminobutyric acid type A (GABAA ) receptors. In this follow-up study, the sleep-promoting effects of triphlorethol A, one of the major phlorotannin constituents, were investigated. The effect of triphlorethol A on sleep-wake architecture and profiles was evaluated based on electroencephalogram and electromyogram data from C57BL/6N mice and compared with the well-known hypnotic drug zolpidem...
April 24, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29694298/do-older-adults-and-those-recovered-from-low-back-injury-share-common-muscle-activation-adaptations
#18
D Adam Quirk, Cheryl L Hubley-Kozey
Theoretical models suggest trunk muscle activation compensates for spinal systems impairments. The purpose of this study was to determine if two populations (older adults and those recovered from a lower back injury (rLBI)) with spinal system impairments have similar muscle activation patterns to each other, but differ from controls. Trunk electromyograms collected from 12 older adults, 16 rLBI, and 19 controls during two dynamic tasks showed that older adults and rLBI had higher activation amplitudes, sustained temporal and more synergistic activation relative to controls...
April 25, 2018: Journal of Motor Behavior
https://www.readbyqxmd.com/read/29679107/oligosynaptic-inhibition-mediated-by-group-ia-afferents-from-flexor-digitorum-superficialis-to-wrist-flexors-in-humans
#19
Mitsuhiro Nito, Wataru Hashizume, Manabu Jimenji, Katsuhiko Suzuki, Toshiaki Sato, Hiromi Fujii, Takuji Miyasaka, Masaomi Shindo, Akira Naito
Effects of low-threshold afferents from the flexor digitorum superficialis (FDS) to the flexor carpi radialis (FCR), flexor carpi ulnaris (FCU) and extensor carpi ulnaris (ECU) motoneurons were examined using a post-stimulus time-histogram (PSTH) and electromyogram-averaging (EMG-A) methods in seven healthy human subjects. Electrical conditioning stimulation to the median nerve branch innervating FDS with the intensity immediately below the motor threshold was delivered. In the PSTH study, the stimulation produced a trough (inhibition) in 19/44 (43%) of FCR and 17/41 (41%) of FCU motor units...
April 20, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29668731/a-wavelet-based-time-frequency-analysis-of-electromyograms-to-group-steps-of-runners-into-clusters-that-contain-similar-muscle-activation-patterns
#20
Vinzenz von Tscharner, Martin Ullrich, Maurice Mohr, Daniel Comaduran Marquez, Benno M Nigg
PURPOSE: To wavelet transform the electromyograms of the vastii muscles and generate wavelet intensity patterns (WIP) of runners. Test the hypotheses: 1) The WIP of the vastus medialis (VM) and vastus lateralis (VL) of one step are more similar than the WIPs of these two muscles, offset by one step. 2) The WIPs within one muscle differ by having maximal intensities in specific frequency bands and these intensities are not always occurring at the same time after heel strike. 3) The WIPs that were recorded form one muscle for all steps while running can be grouped into clusters with similar WIPs...
2018: PloS One
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