Influence of task dynamics on the organization of interlimb responses accompanying standing human leg flexion...

The organization of electromyographic (EMG) and kinetic (ground reaction forces) responses in postural (single stance limb) and primary task (flexing limb) components was examined in standing human subjects during single leg flexion movements over a range of speeds. Interlimb responses occurred coincidently prior to unloading and were scaled as a function of movement speed, suggesting a centrally organized, synchronous mode of coordination which reflected the mechanical constraints related to stance support function.