journal
MENU ▼
Read by QxMD icon Read
search

Journal of Electromyography and Kinesiology

journal
https://www.readbyqxmd.com/read/27889683/biomechanics-of-simulated-versus-natural-cross-country-sit-skiing
#1
V Rosso, L Gastaldi, W Rapp, S Lindinger, Y Vanlandewijck, V Linnamo
The purpose of this study was to investigate the biomechanics of cross-country sit-skiing in simulated and natural skiing. Thirteen international level athletes participated in a ski ergometer test (simulated conditions) and a test on snow in a ski-tunnel (natural conditions) using their personal sit-ski. Tests in both conditions were performed at individual maximal speed. When comparing the two conditions the main results were: (1) maximal speed in simulated conditions was lower (p<0.05) but correlated well with the natural condition (r=0...
November 11, 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27865130/effects-of-fatigue-on-lower-limb-pelvis-and-trunk-kinematics-and-muscle-activation-gender-differences
#2
Giovanna Camparis Lessi, Ana Flávia Dos Santos, Luis Fylipe Batista, Gabriela Clemente de Oliveira, Fábio Viadanna Serrão
BACKGROUND: Muscle fatigue is associated with biomechanical changes that may lead to anterior cruciate ligament (ACL) injuries. Alterations in trunk and pelvis kinematics may also be involved in ACL injury. Although some studies have compared the effects of muscle fatigue on lower limb kinematics between men and women, little is known about its effects on pelvis and trunk kinematics. The aim of the study was to compare the effects of fatigue on lower limb, pelvis and trunk kinematics and muscle activation between men and women during landing...
November 9, 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27863284/landing-from-different-heights-biomechanical-and-neuromuscular-strategies-in-trained-gymnasts-and-untrained-prepubescent-girls
#3
Α Christoforidou, D A Patikas, E Bassa, I Paraschos, S Lazaridis, C Christoforidis, C Kotzamanidis
The purpose of this study was to examine the biomechanics of the lower limb, during landing in female prepubertal gymnasts and prepubertal untrained girls, aged 9-12years. Ten healthy participants were included in each group and performed five landings from 20, 40, and 60cm. Kinematics, ground reaction forces (GRF) and electromyogram (EMG) from the lateral gastrocnemius, tibialis anterior, and vastus lateralis are presented. Gymnasts had higher vertical GRF and shorter braking phase during landing. Compared to untrained girls, gymnasts exhibited for all examined drop heights more knee flexion before and at ground contact, but less knee flexion at maximum knee flexion position...
November 9, 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27863893/professor-carlo-j-de-luca-1943-2016
#4
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
October 17, 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27835831/spatial-distribution-of-surface-emg-on-trapezius-and-lumbar-muscles-of-violin-and-cello-players-in-single-note-playing
#5
Babak Afsharipour, Francesco Petracca, Mauro Gasparini, Roberto Merletti
Musicians activate their muscles in different patterns, depending on their posture, the instrument being played, and their experience level. Bipolar surface electrodes have been used in the past to monitor such activity, but this method is highly sensitive to the location of the electrode pair. In this work, the spatial distribution of surface EMG (sEMG) of the right trapezius and right and left erector spinae muscles were studied in 16 violin players and 11 cello players. Musicians played their instrument one string at a time in sitting position with/without backrest support...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27816845/are-chronic-neck-pain-scapular-dyskinesis-and-altered-scapulothoracic-muscle-activity-interrelated-a-case-control-study-with-surface-and-fine-wire-emg
#6
Birgit Castelein, Ann Cools, Thierry Parlevliet, Barbara Cagnie
OBJECTIVES: The function of the scapula is important in normal neck function and might be disturbed in patients with neck pain. The surrounding muscular system is important for the function of the scapula. To date, it is not clear if patients with idiopathic neck pain show altered activity of these scapulothoracic muscles. Therefore, the objective of this study was to investigate differences in deeper and superficial lying scapulothoracic muscle activity between patients with idiopathic neck pain and healthy controls during arm elevation, and to identify the influence of scapular dyskinesis on muscle activity...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27810649/the-influence-of-digital-filter-type-amplitude-normalisation-method-and-co-contraction-algorithm-on-clinically-relevant-surface-electromyography-data-during-clinical-movement-assessments
#7
Daniel Devaprakash, Gillian J Weir, James J Dunne, Jacqueline A Alderson, Cyril J Donnelly
There is a large and growing body of surface electromyography (sEMG) research using laboratory-specific signal processing procedures (i.e., digital filter type and amplitude normalisation protocols) and data analyses methods (i.e., co-contraction algorithms) to acquire practically meaningful information from these data. As a result, the ability to compare sEMG results between studies is, and continues to be challenging. The aim of this study was to determine if digital filter type, amplitude normalisation method, and co-contraction algorithm could influence the practical or clinical interpretation of processed sEMG data...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27810648/characteristics-of-emg-frequency-bands-in-temporomandibullar-disorders-patients
#8
Fabiano Politti, Claudia Casellato, Marcelo Martins Kalytczak, Marilia Barbosa Santos Garcia, Daniela Aparecida Biasotto-Gonzalez
The aim of the present study was to determine whether any specific frequency bands of surface electromyographic (sEMG) signals are more susceptible to alterations in patients with temporomandibular disorders (TMD), when compared with healthy subjects. Twenty-seven healthy adults (19 women and eight men; mean age: 23±6.68years) and 27 TMD patients (20 women and seven men; mean age: 24±5.89years) voluntarily participated in the experiment. sEMG data were recorded from the right and left masseter muscles (RM and LM) and the right and left anterior temporalis muscles (RT and LT) as the participants performed tests of chewing (CHW) and maximal clenching effort (MCE)...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27770687/the-effects-of-squatting-footwear-on-three-dimensional-lower-limb-and-spine-kinetics
#9
Daniel J Southwell, Shane A Petersen, Tyson A C Beach, Ryan B Graham
Altering footwear worn during performance of the barbell back squat has been shown to change motion patterns, but it is not completely understood how this affects biomechanical loading demands. The primary objective was to compare lower back and extremity net joint moments in 24 experienced weightlifters (12M, 12F) who performed 80% one-repetition maximum back squats under three different footwear conditions (barefoot, running shoes, weightlifting shoes). Results showed that there was a significant main effect of footwear condition on the knee extension moment (p=0...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27770686/cutaneous-silent-period-evoked-in-human-first-dorsal-interosseous-muscle-motor-units-by-laser-stimulation
#10
Mehmet Cemal Kahya, Oğuz Sebik, Kemal S Türker
Painful stimulation of the hand results in an inhibitory response in the hand muscles known as the cutaneous silent period (CSP). In this study, we employed probability- and frequency-based analysis methods to examine the CSP induced by laser stimuli. Subjects were asked to contract their first dorsal interosseous muscle so that selected motor units discharged at a rate of about 8Hz. Laser pulses were delivered to the palm of the hand, and reflex responses were recorded. The stimuli generated CSP in all test subjects...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27768963/the-influence-of-knee-alignment-on-lower-extremity-kinetics-during-squats
#11
Lindsay V Slater, Joseph M Hart
The squat is an assessment of lower extremity alignment during movement, however there is little information regarding altered joint kinetics during poorly performed squats. The purpose of this study was to examine changes in joint kinetics and power from altered knee alignment during a squat. Thirty participants completed squats while displacing the knee medially, anteriorly, and with neutral alignment (control). Sagittal and frontal plane torques at the ankle, knee, and hip were altered in the descending and ascending phase of the squat in both the medial and anterior malaligned squat compared to the control squat...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27741439/experimentally-induced-masseter-pain-changes-masseter-but-not-sternocleidomastoid-muscle-related-activity-during-mastication
#12
Fernanda Pasinato, Clarissa C Santos-Couto-Paz, Jorge Luis Lopes Zeredo, Sergio Bruzadelli Macedo, Eliane C R Corrêa
The aim of this study was to verify the effects of induced masseter-muscle pain on the amplitude of muscle activation, symmetry and coactivation of jaw- and neck-muscles during mastication. Twenty-eight male volunteers, mean age±SD 20.6±2.0years, participated in this study. Surface electromyography of the masseter and sternocleidomastoid (SCM) muscles was performed bilaterally during mastication of a gummy candy before and after injections of monosodium glutamate solution and isotonic saline solution. As a result, we observed a decrease in the amplitude of activation of the masseter muscle on the working side (p=0...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27694060/dynamic-gait-stability-of-treadmill-versus-overground-walking-in-young-adults
#13
Feng Yang, George A King
Treadmill has been broadly used in laboratory and rehabilitation settings for the purpose of facilitating human locomotion analysis and gait training. The objective of this study was to determine whether dynamic gait stability differs or resembles between the two walking conditions (overground vs. treadmill) among young adults. Fifty-four healthy young adults (age: 23.9±4.7years) participated in this study. Each participant completed five trials of overground walking followed by five trials of treadmill walking at a self-selected speed while their full body kinematics were gathered by a motion capture system...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27693990/mcconnell-s-patellar-taping-does-not-alter-knee-and-hip-muscle-activation-differences-during-proprioceptive-exercises-a-randomized-placebo-controlled-trial-in-women-with-patellofemoral-pain-syndrome
#14
Cynthia Gobbi Alves Araújo, Christiane de Souza Guerino Macedo, Daiene Ferreira, Leonardo Shigaki, Rubens A da Silva
: The purpose of this study was to assess the effect of patellar taping on muscle activation of the knee and hip muscles in women with Patellofemoral Pain Syndrome during five proprioceptive exercises. Forty sedentary women with syndrome were randomly allocated in two groups: Patellar Taping (based in McConnell) and Placebo (vertical taping on patella without any stretching of lateral structures of the knee). Volunteers performed five proprioceptive exercises randomly: Swing apparatus, Mini-trampoline, Bosu balance ball, Anteroposterior sway on a rectangular board and Mediolateral sway on a rectangular board...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27693989/a-hip-abduction-exercise-prior-to-prolonged-standing-increased-movement-while-reducing-cocontraction-and-low-back-pain-perception-in-those-initially-reporting-low-back-pain
#15
Daniel Viggiani, Jack P Callaghan
Persons who develop low back pain from prolonged standing exhibit increased muscle cocontraction, decreased movement and increased spine extension. However, it is unclear how these factors relate to pain development. The purpose of this study was to use hip abductor fatigue to manipulate muscle activity patterns and determine its effects on standing behaviours and pain development. Forty participants stood for two hours twice, once following a hip abductor fatigue exercise (fatigue), and once without exercise beforehand (control)...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27684529/lower-limb-joint-stiffness-and-muscle-co-contraction-adaptations-to-instability-footwear-during-locomotion
#16
Charlotte Apps, Thorsten Sterzing, Thomas O'Brien, Mark Lake
Unstable shoes (US) continually perturb gait which can train the lower limb musculature, but muscle co-contraction and potential joint stiffness strategies are not well understood. A shoe with a randomly perturbing midsole (IM) may enhance these adaptations. This study compares ankle and knee joint stiffness, and ankle muscle co-contraction during walking and running in US, IM and a control shoe in 18 healthy females. Ground reaction forces, three-dimensional kinematics and electromyography of the gastrocnemius medialis and tibialis anterior were recorded...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27668572/effects-of-prolonged-vibration-to-vastus-intermedius-muscle-on-force-steadiness-of-knee-extensor-muscles-during-isometric-force-matching-task
#17
Akira Saito, Ryosuke Ando, Hiroshi Akima
Afferent inputs from Ia fibers in muscle spindles are essential for the control of force and prolonged vibration has been applied to muscle-tendon units to manipulate the synaptic input from Ia afferents onto α-motor neurons. The vastus intermedius (VI) reportedly provides the highest contribution to the low-level knee extension torque among the individual synergists of quadriceps femoris (QF). The purpose of the present study was to examine the effect of prolonged vibration to the VI on force steadiness of the QF...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27639316/the-recruitment-order-of-scapular-muscles-depends-on-the-characteristics-of-the-postural-task
#18
Guillermo Mendez-Rebolledo, Valeska Gatica-Rojas, Eduardo Martinez-Valdes, H B Xie
Previous studies show that the scapular muscle recruitment order could possibly change according to the characteristics of the postural task. We aimed to compare the activation latencies of serratus anterior (SA), upper, middle, and lower trapezius (UT, MT and LT, respectively) between an unpredictable perturbation (sudden arm destabilization) and a predictable task (voluntary arm raise) and, to determine the differences in the muscle recruitment order in each task. The electromyographic signals of 23 participants were recorded while the tasks were performed...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27632533/altered-emg-patterns-in-diabetic-neuropathic-and-not-neuropathic-patients-during-step-ascending-and-descending
#19
Fabiola Spolaor, Zimi Sawacha, Gabriella Guarneri, Silvia Del Din, Angelo Avogaro, Claudio Cobelli
Diabetic peripheral neuropathy (DPN) causes motor control alterations during daily life activities. Tripping during walking or stair climbing is the predominant cause of falls in the elderly subjects with DPN and without (NoDPN). Surface Electromyography (sEMG) has been shown to be a valid tool for detecting alterations of motor functions in subjects with DPN. This study aims at investigating the presence of functional alterations in diabetic subjects during stair climbing and at exploring the relationship between altered muscle activation and temporal parameter...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27623025/comparison-of-methods-for-estimating-motor-unit-firing-rate-time-series-from-firing-times
#20
Lukai Liu, Paolo Bonato, Edward A Clancy
The central nervous system regulates recruitment and firing of motor units to modulate muscle tension. Estimation of the firing rate time series is typically performed by decomposing the electromyogram (EMG) into its constituent firing times, then lowpass filtering a constituent train of impulses. Little research has examined the performance of different estimation methods, particularly in the inevitable presence of decomposition errors. The study of electrocardiogram (ECG) and electroneurogram (ENG) firing rate time series presents a similar problem, and has applied novel simulation models and firing rate estimators...
December 2016: Journal of Electromyography and Kinesiology
journal
journal
30771
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"