Volume 24 (1982) Issue 3 Pages 161-164
This study investigated the facilitatory effects of pure-tone background stimulation on the human startle response. Startle eyeblink responses of 13 subjects to an intense white noise were measured under four conditions: silence condition and pure-tone background stimulations at one of three intensities (65, 75, or 85 dB). Amplitudes of startle responses were increased with the background stimulation and the extent of amplitude facilitation was positively related to the intensity of the background stimulus. Although the onset latency of startle was also shortened with the background stimulation, no change was shown with the increase of the background stimulus intensity. These results were discussed and compared with the previous studies in rats.