Applying stochastic resonance to magnify μμ and ββ wave suppression

The goal was to test whether band-limited sensory noises with adequate amplitudes, by the principle of stochastic resonance, could enhance μμ and ββ wave suppressions. Scalp EEG was recorded while the subject performed thumb movements in the presence of vibratory noises applied to thenar belly or thumb tip. Seven subjects without clear μμ or ββ wave suppression in the absence of the mechanical stimuli were recruited. The results showed that when the stimuli were applied to the thenar belly, both μμ and ββ wave suppressions were enhanced in a bell-shaped trend (the characteristics of stochastic resonance) in four subjects.