Rehabilitation and Therapy Commons^™

An Electromyographic Study Of Lower Trapezius Muscle Activity During The Traditional Muscle Testing Position And A Modified Position, Keri M. Doyle, Molly E. Mcdonald, Heather M. Partlow, Eric R. Paur

Physical Therapy Scholarly Projects

Many people use repeated overhead movements in their occupations or recreational activities. Literature has shown that this repeated overhead activity greatly contributes to the incidence of shoulder pathologies such as impingement syndrome. The purpose of this study was to establish whether the lower trapezius was more successfully recruited in the traditional muscle testing position of 145° of shoulder abduction or a modified position consisting of shoulder external rotation while in 80° of shoulder abduction and 90° of elbow flexion.

Forty-one subjects between the ages of 21 and 45 voluntarily participated in this study. One subject was excluded due to exceeding …

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 …

Electromyographic Analysis Of An Isometric Vastus Medialis Oblique Contraction With Incorporated Adductor Component, Dan Thielen, James Turner

Physical Therapy Scholarly Projects

Knee pathology is a common clinical complaint that may result in diminished function of the affected lower extremity, ultimately leading to atrophy of the vastus medialis oblique (VMO) muscle. The VMO contributes a great deal to the medial tracking mechanism of the patella which is crucial for normal biomechanical function of the knee joint. Effective strengthening of the VMO is a challenging task in physical therapy clinics. The purpose of this study was to determine if it is possible to enhance the muscle activity of the VMO with the addition of an adductor contraction.

Thirty-one subjects between the ages of …

Electromyographic Analysis Of Lower Extremity Muscle Activity During Plyo Press Jump And A Vertical Jump, Leigh James Griffith, Kristen Michelle Olson, Daniel Kenneth Sinness, Steven Peter Thomas

Physical Therapy Scholarly Projects

Many training programs have been developed to aid in training the athlete with their goal of maximizing strength and performance. The Plyo Press machine was developed for training athletes enrolled in the Frappier Sports Acceleration Program. This machine was designed to couple strength training with plyometrics to enhance dynamic muscle activity and speed.

There has been limited research on the Plyo Press machine to support these claims. Therefore, the purpose of our study was to compare muscle recruitment during a vertical floor jump versus a plyojump in the Ply Press leg machine. EMG analysis of selected lower extremity muscles was …