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https://www.readbyqxmd.com/read/29785880/oxygen-uptake-and-muscle-activity-limitations-during-ascending-on-a-stair-machine
#1
Amitava Halder, Chuansi Gao, Michael Miller, Kalev Kuklane
This laboratory study examined human stair ascending capacity and constraining factors including legs' local muscle fatigue (LMF) and cardiorespiratory capacity. Twenty-five healthy volunteers, mean age 35.3 years, with maximal oxygen uptake (VO2max ) of 46.7 mL·min-1 ·kg-1 , and maximal heart rate of 190 bpm, ascended on a stair machine at 60% and 75% (3 min each), and 90% of VO2max (5 min or until exhaustion). The VO2 , HR and electromyography (EMG) of the leg muscles were measured. The average VO2highest reached 43...
May 22, 2018: Ergonomics
https://www.readbyqxmd.com/read/29778132/cervical-vestibular-evoked-myogenic-potentials-cvemps-evoked-by-air-conducted-stimuli-in-patients-with-functional-neck-dissection
#2
Hasan Demirhan, Bahtiyar Hamit, Özgür Yiğit
OBJECTIVE: Cervical vestibular-evoked myogenic potentials (cVEMPs) are short-latency vestibulocollic reflexes. The damage on any point of the vestibulocollic reflex pathway could affect the cVEMPs. Whether neck dissection has an effect on the sacculocollic pathway, and consequently on cVEMPs, remains unexplored. The aim of this study was to evaluate the cVEMP findings in patients with functional neck dissection without vestibular symptoms. PATIENTS AND METHODS: This cross-sectional study design, 20 patients who had undergone unilateral neck dissection with sparing of the accessory nerve, SCM and internal jugular vein, were included...
June 2018: Journal of the National Medical Association
https://www.readbyqxmd.com/read/29777980/trunk-postural-adjustments-medium-term-reliability-and-correlation-with-changes-of-clinical-outcomes-following-an-8-week-lumbar-stabilization-exercise-program
#3
Jean-Alexandre Boucher, Richard Preuss, Sharon M Henry, Marilee Nugent, Christian Larivière
BACKGROUND: Low back pain (LBP) has been previously associated with delayed anticipatory postural adjustments (APAs) determined by trunk muscle activation. Lumbar stabilization exercise programs (LSEP) for patients with LBP may restore the trunk neuromuscular control of the lumbar spine, and normalize APAs. This exploratory study aimed at testing the reliability of EMG and kinematics-based postural adjustment measures over an 8-week interval, assessing their sensitivity to LBP status and treatment and examining their relationship with clinical outcomes...
April 22, 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29775800/insertion-and-presence-of-fine-wire-intramuscular-electrodes-to-the-lumbar-paraspinal-muscles-do-not-affect-muscle-performance-and-activation-during-high-exertion-spinal-extension-activities
#4
Szu-Ping Lee, Jo Armour Smith, Matthew Kimber, Kelsey Houk
BACKGROUND: Low back pain (LBP) is commonly associated with paraspinal muscle dysfunctions. A method to study deep lumbar paraspinal (i.e. multifidus) muscle function and neuromuscular activation pattern is intramuscular electromyography (EMG). Previous studies have shown that the procedure does not significantly impact muscle function during activities involving low-level muscle contractions. However, it is currently unknown how muscular function and activation are affected during high-exertion contractions...
May 15, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29775218/unilateral-movement-preparation-causes-task-specific-modulation-of-tms-responses-in-the-passive-opposite-limb
#5
Lilian Chye, Stephan Riek, Aymar de Rugy, Richard G Carson, Timothy J Carroll
Corticospinal excitability is modulated for muscles on both sides of the body during unilateral movement preparation. For the effector, there is a progressive increase in excitability, and a shift in direction of muscle twitches evoked by transcranial magnetic stimulation (TMS) toward the impending movement. By contrast, the directional characteristics of excitability changes in the opposite (passive) limb have not been fully characterized. Here we assessed how preparation of voluntary forces towards four spatially distinct visual targets with the left wrist alters muscle twitches and motor evoked potentials (MEPs) elicited by TMS of left motor cortex...
May 18, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29769834/continuous-knee-cooling-affects-functional-hop-performance-a-randomized-controlled-trial
#6
Bruno Tassignon, Ben Serrien, Kevin De Pauw, Jean-Pierre Baeyens, Romain Meeusen
Cryotherapy is widely used in sports and rehabilitation to aid recovery and injury management. The purpose was to examine if a low temperature computer controlled continuous knee cooling protocol (10°C) for one hour and a moderate continuous knee cooling protocol (18°C) for one hour affected neuromuscular activity and functional performance tests. We used a randomized controlled study design. Twenty healthy male subjects (age = 24 ± 3 years) were included and randomized into 2 groups (10°C and 18°C). On day one, participants performed a maximal voluntary contraction of the quadriceps (MVC), single leg hop for distance (SLHD), and crossover hop for time (COHT) with both legs before and after cooling of their right leg...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29768521/immediate-effects-of-temporary-bite-raising-with-light-cured-orthodontic-band-cement-on-the-electromyographic-response-of-masticatory-muscles
#7
Darin Pativetpinyo, Weera Supronsinchai, Chidsanu Changsiripun
To assess the immediate effects of temporary bite-raising using light-cured orthodontic band cement on the superficial masseter and anterior temporalis electromyography (EMG) activity in healthy adults. Surface EMG signals were recorded bilaterally from the superficial masseter and anterior temporalis muscles of 30 volunteers with a normal occlusion, before and after having temporary bite-raising. The bite-raising was done by adding light-cured orthodontic band cement (3x5x2 mm WxLxH) on the lingual cusps of both upper first molars...
May 14, 2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29768471/performance-based-approach-for-movement-artifact-removal-from-electroencephalographic-data-recorded-during-locomotion
#8
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/29767395/behavioral-therapy-approaches-for-the-management-of-low-back-pain-an-up-to-date-systematic-review
#9
REVIEW
Kristallia Vitoula, Annalena Venneri, Giustino Varrassi, Antonella Paladini, Panagiota Sykioti, Joy Adewusi, Panagiotis Zis
Low back pain is one of the most common causes for seeking medical treatment and it is estimated that one in two people will experience low back pain at some point during their lifetimes. Management of low back pain includes pharmacological and non-pharmacological approaches. Non-pharmaceutical treatments include interventions such as acupuncture, spinal manipulation, and psychotherapy. The latter is especially important as patients who suffer from low back pain often have impaired quality of life and also suffer from depression...
May 16, 2018: Pain and Therapy
https://www.readbyqxmd.com/read/29767354/proprioceptive-muscle-tendon-stimulation-reduces-symptoms-in-primary-orthostatic-tremor
#10
M Wuehr, C Schlick, K Möhwald, R Schniepp
INTRODUCTION: Primary orthostatic tremor (OT) is characterized by high-frequency lower limb muscle contractions and a disabling sense of unsteadiness while standing. To date, therapeutic options for OT are limited. Here, we examined the effects of proprioceptive leg muscle stimulation via muscle tendon vibration (MTV) on tremor and balance control in patients with primary OT. METHODS: Tremor in nine patients with primary OT was examined during four conditions: standing (1), standing with MTV on the bilateral soleus muscles (2), lying (3), and lying with MTV (4)...
May 16, 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29766764/local-cortical-activity-of-distant-brain-areas-can-phase-lock-to-the-olfactory-bulb-s-respiratory-rhythm-in-the-freely-behaving-rat
#11
Daniel Rojas-Líbano, Jonathan Wimmer Del Solar, Marcelo Aguilar-Rivera, Rodrigo Montefusco-Siegmund, Pedro Esteban Maldonado
An important unresolved question about neural processing is the mechanism by which distant brain areas coordinate their activities and relate their local processing to global neural events. A potential candidate for the local-global integration are slow rhythms such as respiration. In this article, we asked if there are modulations of local cortical processing which are phase-locked to (peripheral) sensory-motor exploratory rhythms. We studied rats on an elevated platform where they would spontaneously display exploratory and rest behaviors...
May 16, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29762339/the-relationship-between-fear-avoidance-and-neuromuscular-measures-of-function-in-patients-with-adult-degenerative-scoliosis
#12
Ram Haddas, Isador H Lieberman, Andrew Block
STUDY DESIGN: A prospective cohort study. OBJECTIVE: To examine the relationship of fear-avoidance beliefs and neuromuscular activity during gait in adult degenerative scoliosis (ADS) patients. SUMMARY OF BACKGROUND DATA: Among patients with chronic spine pain, fear-avoidance beliefs are predictive of poor surgical outcomes. Fear-avoidance occurs when patients perceive that movement will worsen underlying physical problems. This process leads them to restrict activity, which further heightens emotional distress...
May 14, 2018: Spine
https://www.readbyqxmd.com/read/29761534/co-contraction-behavior-of-masticatory-and-neck-muscles-during-tooth-grinding
#13
Nikolaos Nikitas Giannakopoulos, Hans-Jürgen Schindler, Daniel Hellmann
OBJECTIVE: The objective of this study was to analyze the co-contraction behavior of jaw and neck muscles during force-controlled experimental grinding in the supine position. METHODS: Twelve symptom-free subjects were enrolled in the experiment study. Electromyographic (EMG) activity of semispinalis capitis, splenius capitis, and levator scapulae muscles was recorded bilaterally with intramuscular fine-wire electrodes, whereas that of sternocleidomastoideus, infrahyoidal, suprahyoidal, masseter, and anterior temporalis muscles were registered with surface electrodes...
May 14, 2018: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/29761011/associations-between-apparent-diffusion-coefficient-and-electromyography-parameters-in-myositis-a-preliminary-study
#14
Hans-Jonas Meyer, Alexander Emmer, Malte Kornhuber, Alexey Surov
Objective: MRI is widely used in several muscle disorders. Diffusion-weighted imaging (DWI) is an emergent imaging modality sensitive to microstructural alterations in tissue. The apparent diffusion coefficient (ADC) is used to quantify the random motion of water molecules. Electromyography (EMG) is a clinically used diagnostic tool in myositis. The aim of this study was to elucidate possible associations between ADC values and EMG findings in myositis patients. Method: Seven patients (eight investigated muscles) with myositis (mean age 51...
May 2018: Brain and Behavior
https://www.readbyqxmd.com/read/29760671/emotion-in-stories-facial-emg-evidence-for-both-mental-simulation-and-moral-evaluation
#15
Björn 't Hart, Marijn E Struiksma, Anton van Boxtel, Jos J A van Berkum
Facial electromyography research shows that corrugator supercilii ("frowning muscle") activity tracks the emotional valence of linguistic stimuli. Grounded or embodied accounts of language processing take such activity to reflect the simulation or "reenactment" of emotion, as part of the retrieval of word meaning (e.g., of "furious") and/or of building a situation model (e.g., for "Mark is furious"). However, the same muscle also expresses our primary emotional evaluation of things we encounter...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29753876/electromyographic-study-of-hip-muscles-involved-in-total-hip-arthroplasty-surprising-results-using-the-direct-anterior-minimally-invasive-approach
#16
Jules Bernard, Fredson Razanabola, Julien Beldame, Stéphane Van Driessche, Helena Brunel, Thomas Poirier, Jean Matsoukis, Fabien Billuart
BACKGROUND: The functional and clinical benefit of minimally invasive total hip arthroplasty (THA) is well-known, but the literature reports impaired gait and posture parameters as compared to the general population, especially following use of the anterior minimally invasive approach, which has more severe impact on posture than the posterior approach. The reasons for this impairment, however, remain unexplained. We therefore conducted a surface electromyography (sEMG) study of the hip muscles liable to be affected by arthroplasty surgery: gluteus maximus (GMax), gluteus medius (GMed, tensor fasciae latae (TFL), and sartorius (S)...
May 10, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29752246/a-novel-stimulation-paradigm-to-limit-the-habituation-of-the-nociceptive-withdrawal-reflex
#17
Sabata Gervasio, Christian B Laursen, Ole K Andersen, Kristian Hennings, Erika G Spaich
In gait rehabilitation, combining gait therapy with functional electrical stimulation based on the nociceptive withdrawal reflex (NWR) improves walking velocity and gait symmetry of hemiparetic patients. However, habituation of the NWR can affect the efficacy of training. The current study aimed at identifying the stimulation parameters that would limit, in healthy participants, the habituation of the NWR. The NWR was elicited at every heel-off while the participants walked on a treadmill. Three stimulation paradigms were tested: deterministic paradigm (fixed parameters), stochastic pulse duration paradigm (varying the pulse duration of the stimuli), and stochastic frequency paradigm (varying the frequency of the stimuli)...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29751090/sex-dependent-and-sex-independent-muscle-activation-patterns-in-adult-gait-as-a-function-of-age
#18
Christopher A Bailey, Federica Corona, Giuseppina Pilloni, Micaela Porta, Maria Chiara Fastame, Paul Kenneth Hitchcott, Maria Pietronilla Penna, Massimiliano Pau, Julie N Côté
INTRODUCTION: Aging leads to poorer neuromuscular control that may impact mobility. However, the specific decades when these changes occur, and whether these time-based changes are sex-specific, are unclear. METHODS: Adults aged 20-82 years (N = 93, 51 females) walked six gait trials at their preferred speed over a 10-m platform. Electromyography (EMG) of the rectus femoris (RF), tibialis anterior (TA), and gastrocnemius lateralis (GL) were measured using wireless surface sensors...
May 8, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29747022/detection-of-generalized-tonic-clonic-seizures-from-ear-eeg-based-on-emg-analysis
#19
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/29746845/detection-of-stress-and-the-effects-of-central-nervous-system-depressants-by-gastrointestinal-smooth-muscle-electromyography-in-wakeful-rats
#20
K F Szűcs, G Grosz, M Süle, A Sztojkov-Ivanov, E Ducza, A Márki, A Kothencz, L Balogh, R Gáspár
AIMS: The altered gut-brain interaction can be in the background of functional gastrointestinal (GI) disorders. In the GI tract, the slow-wave myoelectric signals can be detected by electromyography (EMG). The aims of our study were to follow up the stress induced alteration in the GI tract by smooth muscle EMG in wakeful rats. MAIN METHODS: The GI tract myoelectric activity of male rats was measured by an electrode pair under the abdominal skin, the responses were detected and analyzed by a software using fast Fourier transformation...
May 7, 2018: Life Sciences
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