Contribution of Each Motor Point of Quadriceps Femoris to Knee Extension Torque During Neuromuscular Electrical Stimulation

Transcutaneous neuromuscular electrical stimulation (NMES) can be used to activate the quadriceps femoris muscle produce knee extension torque via seven distinct motor points, defined as most sensitive locations on belly stimuli. However, it remains unclear how much individual points of contribute joint torque. Here we systematically investigated contribution each point produced by paired Ten able-bodied individuals participated in this study. Paired stimuli was applied delivering impulses all combinations among (i.e., totaling 127 combinations) at two different intensities 25% and 50% maximum) while recording isometric The estimated using statistical analyses. We found that a linear addition twitch torques induced single stimulus overestimated multiple stimulations, suggesting overlaps fibres activated point. Using regressions, identified average during significant differences between these contributions. demonstrated for group contraction; findings provide useful information design rehabilitation NMES muscles.