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Electromyography

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Articles 31 - 37 of 37

Full-Text Articles in Rehabilitation and Therapy

Assessing The Therapeutic Effect Of 630 Nm Light-Emitting Diodes Irradiation On The Recovery Of Exercise-Induced Hand Muscle Fatigue With Surface Electromyogram, Dandan Yang, Xiaoying Wu, Wensheng Hou, Xiaolin Zheng, Jun Zheng, Yingtao Jiang Jan 2012

Assessing The Therapeutic Effect Of 630 Nm Light-Emitting Diodes Irradiation On The Recovery Of Exercise-Induced Hand Muscle Fatigue With Surface Electromyogram, Dandan Yang, Xiaoying Wu, Wensheng Hou, Xiaolin Zheng, Jun Zheng, Yingtao Jiang

Electrical & Computer Engineering Faculty Research

This paper aims to investigate the effect of light emitting diode therapy (LEDT) on exercise-induced hand muscle fatigue by measuring the surface electromyography (sEMG) of flexor digitorum superficialis. Ten healthy volunteers were randomly placed in the equal sized LEDT group and control group. All subjects performed a sustained fatiguing isometric contraction with the combination of four fingertips except thumb at 30% of maximal voluntary contraction (MVC) until exhaustion. The active LEDT or an identical passive rest therapy was then applied to flexor digitorum superficialis. Each subject was required to perform a re-fatigue task immediately after therapy which was the same …


Shoulder-And Back-Muscle Activation During Shoulder Abduction And Flexion Using A Bodyblade Pro Versus Dumbbells, Joseph S. Parry, Rachel Straub, Daniel Cipriani Jan 2012

Shoulder-And Back-Muscle Activation During Shoulder Abduction And Flexion Using A Bodyblade Pro Versus Dumbbells, Joseph S. Parry, Rachel Straub, Daniel Cipriani

Physical Therapy Faculty Articles and Research

Context: The Bodyblade Pro is used for shoulder rehabilitation after injury. Resistance is provided by blade oscillations—faster oscillations or higher speeds correspond to greater resistance. However, research supporting the Bodyblade Pro’s use is scarce, particularly in comparison with dumbbell training. Objective: To compare muscle activity, using electromyography (EMG), in the back and shoulder regions during shoulder exercises with the Bodyblade Pro vs dumbbells. Design: Randomized crossover study. Setting: San Diego State University biomechanics laboratory. Participants: 11 healthy male subjects age 19–32 y. Intervention: Subjects performed shoulder-flexion and -abduction exercises using a Bodyblade Pro and …


Peak Triceps Surae Muscle Activity Is Not Specific To Knee Flexion Angles During Mvic, Kim Hébert-Losier, Anthony G. Schneiders, José A. García, S John Sullivan, Guy G. Simoneau Oct 2011

Peak Triceps Surae Muscle Activity Is Not Specific To Knee Flexion Angles During Mvic, Kim Hébert-Losier, Anthony G. Schneiders, José A. García, S John Sullivan, Guy G. Simoneau

Physical Therapy Faculty Research and Publications

There is limited research on peak activity of the separate triceps surae muscles in select knee flexion (KF) positions during a maximum voluntary isometric contraction (MVIC) used to normalize EMG signals. The aim of this study was to determine how frequent peak activity occurred during an MVIC for soleus (SOL), gastrocnemius medialis (GM), and gastrocnemius lateralis (GL) in select KF positions, and if these peaks were recorded in similar KF positions. Forty-eight healthy individuals performed unilateral plantar-flexion MVIC in standing with 0°KF and 45°KF, and in sitting with 90°KF. Surface EMG of SOL, GM, and GL were collected and processed …


Patellofemoral Pain Syndrome Alters Neuromuscular Control And Kinetics During Stair Ambulation, Naoko Aminaka, Brian G. Pietrosimone, Charles W. Armstrong, Andrew Mezsaros, Phillip A. Gribble Jan 2011

Patellofemoral Pain Syndrome Alters Neuromuscular Control And Kinetics During Stair Ambulation, Naoko Aminaka, Brian G. Pietrosimone, Charles W. Armstrong, Andrew Mezsaros, Phillip A. Gribble

Faculty Publications - College of Physical Therapy

The aim of the study was to investigate differences in frontal plane knee kinetics, onset timing and dura-tion of the gluteus medius (GMed), adductor longus (AL), and vastus medialis oblique (VMO) during stair ambulation between those with and without patellofemoral pain syndrome (PFPS). Twenty PFPS patients and twenty healthy participants completed stair ambulation while surface electromyography (EMG), video, and ground reaction forces were collected. PFPS patients had a higher peak internal knee abduction moment during stair ascent, and a higher internal knee abduction impulse for both ascent and descent. During stair ascent, PFPS patients displayed earlier onset of the AL …


The Role Of Lower Leg Muscle Activity In Blood Pressure Maintenance Of Older Adults, Michelle M. Masterson, Amy L. Morgan, Christine E. Multer, Daniel Cipriani Jan 2006

The Role Of Lower Leg Muscle Activity In Blood Pressure Maintenance Of Older Adults, Michelle M. Masterson, Amy L. Morgan, Christine E. Multer, Daniel Cipriani

Physical Therapy Faculty Articles and Research

Purpose. Age-associated muscle weakness, postural instability, and orthostatic hypotension have been identified as contributing factors to falls , but the relationships among them are not clear. Therefore, the purpose of this study, a two-way factorial design, was to investigate the differences in lower extremity (LE) muscle activity, blood pressure (BP), and heart rate (HR) between young and older individuals in an upright position. Methods. Ten young males (20-24 yrs.) and 10 older males (65-82 yrs.) stood for 15 minutes while BP, HR, and LE electromyography (EMG) were recorded at one minute intervals . A two-way ANOVA was used …


Time To Task Failure Differs With Load Type When Old Adults Perform A Submaximal Fatiguing Contraction, Sandra K. Hunter, Ludovic Rochette, Ashley Critchlow, Roger M. Enoka Jun 2005

Time To Task Failure Differs With Load Type When Old Adults Perform A Submaximal Fatiguing Contraction, Sandra K. Hunter, Ludovic Rochette, Ashley Critchlow, Roger M. Enoka

Exercise Science Faculty Research and Publications

Young adults exhibit a longer time to task failure when performing a submaximal isometric contraction by pushing against a force transducer (force task) than when supporting an equivalent inertial load (position task). The purpose of this study was to compare the time to failure for old adults when they performed a force task and a position task with the elbow flexor muscles. Eighteen old adults (72 ± 4 years) performed the force and position tasks at 20% maximal voluntary contraction (MVC) force until task failure. The time to task failure was briefer for the position task (10.6 ± 6.1 min) …


Comparison Of Surface Electromyography And Myotonometric Measurements During Voluntary Isometric Contractions, Charles Leonard, Jason S. Brown, Timothy R. Price, Susan A. Queen, Eugene L. Mikhailenok Jan 2004

Comparison Of Surface Electromyography And Myotonometric Measurements During Voluntary Isometric Contractions, Charles Leonard, Jason S. Brown, Timothy R. Price, Susan A. Queen, Eugene L. Mikhailenok

Physical Therapy and Rehabilitation Science Faculty Publications

Objectives: Muscle stiffness increases during muscle contraction.The purpose of this study was to determine the strength of the correlation between myotonometric measurements of muscle stiffness and surface electromyography (sEMG) measurements during various levels of voluntary isometric contractions of the biceps brachii muscle. Subjects: Eight subjects (four female; four male), with mean age of 30:6 ± 8:23 years, volunteered to participate in this study. Methods: Myotonometer and sEMG measurements were taken simultaneously from the right biceps brachii muscle.Data were obtained: (1) at rest, (2) while the subject held a 15 lb (6.8 kg) weight isometrically and, (3) during a maximal voluntary …