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https://www.readbyqxmd.com/read/29346627/severe-and-protracted-sleep-disruptions-in-mouse-model-of-post-traumatic-stress-disorder
#1
Rishi Sharma, Pradeep Sahota, Mahesh M Thakkar
Increasing evidences suggest that the predator threat model is a valid animal model of post-traumatic stress disorder (PTSD). However, sleep has never been examined in this model. Since sleep disturbances, including insomnia and excessive daytime sleepiness, are severe and protracted symptoms of PTSD, we hypothesized that mice exposed to predator odor trauma (POT) will display contextual fear conditioning along with severe and protracted sleep disruptions.Adult male C57BL/6J mice, instrumented with wire electrodes [to record hippocampal field potentials (LFP) and nuchal muscle (EMG) activity], were exposed to contextual conditioning using soiled cat litter as unconditional stimulus (US)...
January 13, 2018: Sleep
https://www.readbyqxmd.com/read/29333872/effects-and-underlying-mechanisms-of-unstable-shoes-on-chronic-low-back-pain-a-randomized-controlled-trial
#2
Juan Francisco Lisón, Borja Ortega-Santana, Álvaro Antón-Nogués, Palmy González-Requena, Cristina Vera-Hervás, Julio Doménech-Fernández, Daniel Sánchez-Zuriaga, Pablo Salvador-Coloma
OBJECTIVE: To investigate the effects that wearing unstable shoes has on disability, trunk muscle activity, and lumbar spine range of motion (ROM) in patients with chronic lower back pain (CLBP). DESIGN: Randomized controlled trial. SETTING: Orthopedic Surgery Service. PARTICIPANTS: We randomized 40 adults with nonspecific CLBP either to an unstable shoes group ( n = 20) or to the control group ( n = 20). INTERVENTION: The participants in the unstable shoes group were advised to wear these shoes for a minimum of six hours a day for four weeks...
January 1, 2018: Clinical Rehabilitation
https://www.readbyqxmd.com/read/29333801/efficacy-of-the-regent-suit-based-rehabilitation-on-gait-emg-patterns-in-hemiparetic-subjects-a-pilot-study
#3
Luigi Iuppariello, Giovanni D'Addio, Maria Romano, Paolo Bifulco, Nicola Pappone, Bernardo Lanzillo, Mario Cesarelli
BACKGROUND: The recovery of the functional limb mobility of patients with cerebral damages can take great benefit of the role offered by proprioceptive rehabilitation. Recently have been developed a special Regent Suit (RS) for rehabilitative applications. Actually, there are preliminary studies which describes the effects of RS on gait recovery of stroke patients in acute stage, but none in chronic stage. Moreover, it is known that motor recovery does not always reflect improvements of the muscle activity and coactivity...
January 11, 2018: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/29333223/development-of-practical-functional-electrical-stimulation-cycling-systems-based-on-an-electromyography-study-of-the-cybathlon-2016
#4
Jetsada Arnin, Traisak Yamsa-Ard, Preechapawan Triponyuwasin, Yodchanan Wongsawat
The purpose of this study was to develop a functional electrical stimulation (FES) system based on the motor driving concept for use by spinal cord injury patients participating in the FES Cycling competition at the Cybathlon 2016. The proposed FES system consists of a low-power control system, a precise processor unit, and a 4-channel stimulation unit. Self-adhesive carbon conductive electrodes were utilized for stimulation. A 26-year-old SCI patient was qualified to participate in the competition. The pilot patient underwent training for 16 months, which included experience with FES stimulation, performing FES cycling, and reducing spasticity, to practice using the FES system...
December 5, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29332742/the-effects-of-dorso-lumbar-motion-restriction-on-emg-activity-of-selected-muscles-during-running
#5
Joseph J Morley, Edward Traum
The effects of restricting dorso-lumbar spine mobility on electromyographic activity of the erector spinae, quadriceps femoris, hamstrings and gastrocnemius muscles in runners was investigated. Thermoplastic casting material was fashioned into a rigid orthosis and used to restrict spinal motion during running. Volunteers ran on a treadmill at 2.78 m/sec, under normal conditions and with spinal motion restricted. Surface electromyographic data was collected during both sets of trials. Normal electromyographic data was also compared with previous authors to determine similarity with their electromyographic data...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29332740/an-electromyographic-analysis-of-selected-asana-in-experienced-yogic-practitioners
#6
Kathleen Kelley, Katherine Slattery, Kaitlyn Apollo
The purpose of this study was to assess electromyographic (EMG) output of the anterior tibialis (TA), medial head of the gastrocnemius (GA), rectus femoris (RF), bicep femoris (BF), and gluteus medius (GM) in experienced yogic practitioners during selected yoga asana. A secondary purpose was to examine the differences in EMG output in unilateral V. bilateral standing yoga asana. The study was a single occasion descriptive design. Thirteen healthy yoga practitioners (1 male, 12 females, average age of 37.5) with more than five years of experience were recruited...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29332059/analysis-of-skeletal-muscle-performance-using-piezoelectric-film-sensors
#7
Anat Ratnovsky, Emanuel Kusayev, Sara Naftali
A flexible piezoelectric thin film sensor has been proposed recently in several studies for detection of muscle movements. The objective of this study was to investigate the ability of this sensor to assess skeletal muscle performance and fatigue under isokinetic contractions. Simultaneous noninvasive measurements of muscles activity were done using surface electromyography (EMG) electrodes and two thin film piezoelectric sensors. Measurements were taken from the biceps during slow and fast elbow flexion with and without strong grip, during different weight lifting and from the gastrocnemius during treadmill marching at speeds of 4 and of 10 kph...
January 5, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29330612/analysis-of-the-stomatognathic-system-of-children-according-orthodontic-treatment-needs
#8
Simone Cecílio Hallak Regalo, Bárbara de Lima Lucas, Kranya Victoria Díaz-Serrano, Nicolly Parente Ribeiro Frota, Isabela Hallak Regalo, Mariângela Salles Pereira Nassar, Mariah Acioli Righetti, Lígia Franco Oliveira, Lígia Maria Napolitano Gonçalves, Selma Siéssere, Marcelo Palinkas
PURPOSE: The present study evaluated electromyographic activity (EMG), masticatory performance, and tongue strength in children without and with orthodontic treatment needs. PATIENTS AND METHODS: A total of 90 children were screened and divided into the following groups: Group I (no treatment needed; mean age: 8.00 ± 0.43 years; n = 26), Group II (few malocclusions, treatment needed; mean age: 8.89 ± 0.43 years; n = 28), and Group III (slight-to-borderline treatment needed; mean age: 8...
January 12, 2018: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/29328985/standing-on-a-sliding-board-affects-generation-of-anticipatory-and-compensatory-postural-adjustments
#9
Bing Chen, Yun-Ju Lee, Alexander S Aruin
Postural control is compromised in the presence of body instability. We studied anticipatory and compensatory postural adjustments people use to maintain balance while standing on an unstable surface and performing voluntary arm movements. Nine healthy participants stood on a sliding board (that was either locked and as such motionless or unlocked and as such free to move in the anterior-posterior direction) and performed fast bilateral arms flexion. Arm acceleration, bilateral electromyographic activity (EMG) of the trunk and lower extremity muscles and center of pressure (COP) displacements were recorded and analyzed within the intervals typical for the anticipatory (APAs) and compensatory (CPAs) postural adjustments...
December 28, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29327334/a-masked-least-squares-smoothing-procedure-for-artifact-reduction-in-scanning-emg-recordings
#10
Íñigo Corera, Adrián Eciolaza, Oliver Rubio, Armando Malanda, Javier Rodríguez-Falces, Javier Navallas
Scanning-EMG is an electrophysiological technique in which the electrical activity of the motor unit is recorded at multiple points along a corridor crossing the motor unit territory. Correct analysis of the scanning-EMG signal requires prior elimination of interference from nearby motor units. Although the traditional processing based on the median filtering is effective in removing such interference, it distorts the physiological waveform of the scanning-EMG signal. In this study, we describe a new scanning-EMG signal processing algorithm that preserves the physiological signal waveform while effectively removing interference from other motor units...
January 11, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29325902/which-data-should-be-tracked-in-forward-dynamic-optimisation-to-best-predict-muscle-forces-in-a-pathological-co-contraction-case
#11
Colombe Bélaise, Benjamin Michaud, Fabien Dal Maso, Katja Mombaur, Mickaël Begon
The choice of the cost-function for predicting muscle forces during a movement remains a challenge, especially in patients with neuromuscular disorders. Forward dynamics-based optimisations mainly track joint kinematics or torques, combined with a least-excitation criterion. Tracking marker trajectories and/or electromyography (EMG) has rarely been proposed. Our objective was to determine the best tracking objective-function to accurately predict the upper-limb muscle forces. A musculoskeletal model was created and EMG was simulated to obtain a reference movement - a shoulder abduction...
January 4, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29325884/experimental-low-back-pain-decreased-trunk-muscle-activity-in-currently-asymptomatic-recurrent-low-back-pain-patients-during-step-tasks
#12
Lars Henrik Larsen, Rogerio Pessoto Hirata, Thomas Graven-Nielsen
Low back pain (LBP) patients demonstrate reorganized trunk muscle activity but if similar changes are manifest in recurrent LBP patients (R-LBP) during asymptomatic periods remains unknown. In 26 healthy and 27 currently asymptomatic R-LBP participants electromyographic activity (EMG) was recorded from trunk and gluteal muscles during series of stepping up and down on a step bench before and during experimentally intramuscular induced unilateral and bilateral LBP. Pain intensity was assessed by numeric rating scale (NRS) scores...
January 8, 2018: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/29324579/traditional-vs-suspended-pushup-muscle-activation-in-athletes-and-sedentary-females
#13
Majid M Syed-Abdul, Dhwani S Soni, William M Miller, Ryan J Johnson, Jeremy T Barnes, Thomas J Pujol, Jason D Wagganer
Many strength training (ST) programs incorporate pushup exercises, which primarily activate upper body muscles. Past data supports the fact that shoulder girdle muscles [i.e., triceps (T) and anterior deltoids (AD)] exhibit greater electromyography (EMG) activity when a pushup is performed on an unstable [i.e., suspended (SP)] vs. stable [i.e., traditional (TD)] surface (Andrade, 2011). Sixty-nine healthy female volunteers [soccer players (SO), n=24; gymnasts (GY), n=21; sedentary (SE), n=24) performed three TD and three SP pushups...
January 5, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29324449/toward-optimizing-vestibular-evoked-myogenic-potentials-normalization-reduces-the-need-for-strong-neck-muscle-contraction
#14
Kimberley S Noij, Barbara S Herrmann, Steven D Rauch, John J Guinan
BACKGROUND: The cervical vestibular evoked myogenic potential (cVEMP) represents an inhibitory reflex of the saccule measured in the ipsilateral sternocleidomastoid muscle (SCM) in response to acoustic or vibrational stimulation. Since the cVEMP is a modulation of SCM electromyographic (EMG) activity, cVEMP amplitude is proportional to muscle EMG amplitude. We sought to evaluate muscle contraction influences on cVEMP peak-to-peak amplitudes (VEMPpp), normalized cVEMP amplitudes (VEMPn), and inhibition depth (VEMPid)...
January 12, 2018: Audiology & Neuro-otology
https://www.readbyqxmd.com/read/29324410/decoding-motor-unit-activity-from-forearm-muscles-perspectives-for-myoelectric-control
#15
Tamas Kapelner, Francesco Negro, Oskar C Aszmann, Dario Farina
We prove the feasibility of decomposing high density surface EMG signals from forearm muscles in non-isometric wrist motor tasks of normally limbed and limb-deficient individuals with the perspective of using the decoded neural information for prosthesis control. For this purpose, we recorded surface EMG signals during motions of three degrees of freedom of the wrist in seven normally limbed subjects and two patients with limb deficiency. The signals were decomposed into individual motor unit activity with a convolutive blind source separation algorithm...
January 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29322201/characterization-of-corticospinal-activation-of-finger-motor-neurons-during-precision-and-power-grip-in-humans
#16
Christian Svane, Christian Riis Forman, Jens Bo Nielsen, Svend Sparre Geertsen
Direct and indirect corticospinal pathways to finger muscles may play a different role in control of the upper extremity. We used transcranial magnetic stimulation (TMS) and coherence analysis to characterize the corticospinal drive to the first dorsal interosseous (FDI) and abductor pollicis brevis (APB) when active during a precision and power grip task. In experiment 1, single motor units were recorded during precision grip and power grip in 20 adults (25.2 ± 7.1 years). Post-stimulus time histograms (PSTH) were obtained following TMS...
January 10, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29319600/abdominal-muscle-activation-during-common-modifications-of-the-trunk-curl-up-exercise
#17
Martin Eriksson Crommert, Anna Bjerkefors, Olga Tarassova, Maria M Ekblom
The purpose of this study was to investigate effects of common modifications of trunk curl-up exercise on the involvement of the abdominal muscles, particularly the deepest muscle layer, transversus abdominis (TrA). Ten healthy females performed five different variations of the trunk curl-up at a standardized speed, varying the exercise by assuming three different arm positions and applying left and right twist. Indwelling fine-wire electromyography (EMG) electrodes were used to record from TrA, obliquus internus (OI), obliquus externus (OE) and rectus abdominis (RA) unilaterally on the right side...
January 9, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29305618/control-of-vertical-posture-while-standing-on-a-sliding-board-and-pushing-an-object
#18
Yun-Ju Lee, Bing Chen, Jing-Nong Liang, Alexander S Aruin
Voluntary pushing or translation perturbation of the support surface each induces a body perturbation that affects postural control. The objective of the study was to investigate anticipatory (APA) and compensatory (CPA) postural adjustments when pushing an object (that induces self-initiated perturbation) and standing on a sliding board (that induces translational perturbation). Thirteen healthy young participants were instructed to push a handle with both hands while standing on a sliding board that was either free to move in the anterior-posterior direction or stationary...
January 5, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29305050/intraspinal-microstimulation-for-respiratory-muscle-activation
#19
Michael D Sunshine, Comron N Ganji, Paul J Reier, David D Fuller, Chet T Moritz
A complex propriospinal network is synaptically coupled to phrenic and intercostal motoneurons, and this makes it difficult to predict how gray matter intraspinal microstimulation (ISMS) will recruit respiratory motor units. We therefore mapped the cervical and high thoracic gray matter at locations which ISMS activates diaphragm (DIA) and external intercostal (EIC) motor units. Respiratory muscle electromyography (EMG) was recorded in anesthetized female spinally intact adult rats while a stimulating electrode was advanced ventrally into the spinal cord in 600μm increments...
January 2, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29304108/a-four-state-markov-model-of-sleep-wakefulness-dynamics-along-light-dark-cycle-in-mice
#20
Leonel Perez-Atencio, Nicolas Garcia-Aracil, Eduardo Fernandez, Luis C Barrio, Juan A Barios
Behavioral states alternate between wakefulness (wk), rapid eye movement (rem) and non-rem (nrem) sleep at time scale of hours i.e., light and dark cycle rhythms and from several tens of minutes to seconds (i.e., brief awakenings during sleep). Using statistical analysis of bout duration, Markov chains of sleep-wk dynamics and quantitative EEG analysis, we evaluated the influence of light/dark (ld) changes on brain function along the sleep-wk cycle. Bout duration (bd) histograms and Kaplan-Meier (km) survival curves of wk showed a bimodal statistical distribution, suggesting that two types of wk do exist: brief-wk (wkb) and long-wk (wkl)...
2018: PloS One
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