Reflex modulation due to supplementary stimulation.
D000161:Acoustic Stimulation; D000818:Animals; D003214:Conditioning, Classical; D006185:Habituation, Psychophysiologic; D007266:Inhibition, Psychological; D008297:Male; D009949:Orientation; D051381:Rats; D013216:Reflex, Startle / Q000502:physiology*; D013997:Time Factors