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Previous studies have shown that the amplitude of the acoustic startle reflex is increased by the presentation of aversive stimuli. In the present study, the amplitude of acoustic startle in rats was increased by exposure to high illumination levels. The effect was directly related to the intensity (0, 8, 70, and 700 footlamberts) of illumination (experiment I); was blocked by the anxiolytic compound...
Background: Modulation of the acoustic startle response is a simple and objective indicator of emotionality and attention in rodents and humans. This finding has proven extremely valuable for analysis of neural systems associated with fear and anxiety. Until recently, there have been few efforts to develop acoustic startle measurement in nonhuman primates. We report here development of a whole-body...
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