SPATIAL DISTRIBUTION PATTERN OF THE ELECTROMYOGRAPHIC POTENTIAL IN THE VASTUS MEDIALIS AND LATERALIS MUSCLES FOR THREE KNEE FLEXION ANGLES DURING ISOMETRIC KNEE EXTENSION

Understanding the function of vastus lateralis (VL) and medialis (VM) muscles is important since these are essential for daily sport activities. The association between knee flexion angle spatial muscle activation controversial. This study compares distribution patterns multi-channel electromyographic activities VL VM at three angles intensities isometric contraction. Sixteen men performed extensions 30%, 50% 70% maximal voluntary contraction (MVC), [Formula: see text], text] flexion. Alterations in potential were determined by root mean square (RMS), modified entropy, coefficient variation potential. Modified entropy showed differences RMS was similar muscles, with no 50%, or MVC. differed among angles, as did activity distal proximal muscles. These findings suggest need functional evaluation each angle.