Does Electrode Sensor Positioning over Motor Points Affect Different Portions of Quadriceps Muscle Architecture during Submaximal Evoked Torque?

Background and Objectives. Few studies have evaluated differences in muscle architecture quadriceps femoris constituents with sensor electrodes positioned over vastus lateralis (VL) medialis (VM) motor points during a neuromuscular electrical stimulation (NMES) session. We aimed to investigate the changes of rectus (RF), VL, VM, intermedius (VI) portions evoked contractions placed VL VM points. Materials Methods. The study is crossover, repeated-measure design, conducted healthy males aged 24.0 ± 4.6 years. Ultrasonography at rest contraction 40% maximum voluntary (MVC) were used assess pennation angle ( id="M2"> θ p ) fascicle length (Lf) RF, VI portions. Results. mean torque observed was id="M3"> 201.14 50.22 N.m MVC id="M4"> 80.45 20.08 N.m. There no difference for id="M5"> comparing four components id="M6"> = 0.27 ). significant id="M7"> < 0.05 interaction Lf without relevant clinical importance study. Conclusions. on Therefore, clinicians can choose either or electrode positioning expect similar adaptation given torque. Future should be establish optimal different optimize more rational NMES settings.