Effect of force perturbation on elbow joint pulse response in posture

The authors show that small random force perturbations do not alter the mechanical properties of the elbow joint in posture by comparing the pulse responses evoked by a pulse force with or without superimposed random force perturbations. Random force perturbations have little effect on the pulse response, and the pulse response is consistent with the mechanical properties obtained through random perturbations. The biceps and triceps EMGs are smaller with random perturbations than without them which may be due to pre-synaptic inhibition