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Full-Text Articles in Medicine and Health Sciences
Knee Angle-Specific Emg Normalization: The Use Of Polynomial Based Emg-Angle Relationships., Jacob Earp, Robert Newton, Prue Cormie, Anthony Blazevich
Knee Angle-Specific Emg Normalization: The Use Of Polynomial Based Emg-Angle Relationships., Jacob Earp, Robert Newton, Prue Cormie, Anthony Blazevich
Prue Cormie
The normalization of EMG signals to those recorded during a maximal voluntary contraction provides a valid construct for comparisons of relative muscle activity. However, the length dependence of muscle activation and purported, substantial, muscle translocation and changes in muscle architecture during dynamic movements presents a need for joint angle-dependent normalization processes. The purposes of the present study were to: (1) quantify variations in muscle activity across a large ROM, (2) determine the accuracy with which fitted EMG-joint angle curves accurately characterized these variations, and (3) compare peak (EMG-P) and average (EMG-A) EMG amplitudes obtained during a countermovement leg extension when …
The Effect Of Patellar Taping On The Onset Of Vastus Medialis Obliquus And Vastus Lateralis Muscle Activity In Persons With Patellofemoral Pain, Wendy L. Gilleard, Jenny Mcconnell, David Parsons
The Effect Of Patellar Taping On The Onset Of Vastus Medialis Obliquus And Vastus Lateralis Muscle Activity In Persons With Patellofemoral Pain, Wendy L. Gilleard, Jenny Mcconnell, David Parsons
Wendy L Gilleard
Background and Purpose. The purpose of this study was to investigate the effect of patellar taping on the onset of activity of the vastus medialis obliquus muscle (VMO) and the vastus lateralis muscle (VL). Subjects and Methods. Fourteen female subjects with patellar pain walked up and down stairs in two conditions: (1) with the patellofemoral joint of the painful lower extremity taped so that the pain was reduced by at least 50% on a pain provocation test and (2) without patellar taping. Results. When the patellofemoral joint was not taped, there was no difference in the onset of activity between …