Stitt C L, Hoffmann H S, Marsh R R
J Exp Psychol Anim Behav Process. 1976 Jul;2(3):260-5. doi: 10.1037//0097-7403.2.3.260.
In a series of experiments it was found that the amount of inhibition produced by a weak acoustic stimulus occurring 64 msec prior to a startle-eliciting stimulus is unaffected by a second weak acoustic stimulus occurring 4 msec prior to the startle-eliciting stimulus. Likewise, the amount of latency reduction produced by an antecedent stimulus with a 4-msec lead time is unaffected by the presence of an antecedent stimulus with a 64-msec lead time. Finally, it was found that both the amount of inhibition produced by a prestimulus with a 64-msec lead time and the amount of latency reduction produced by a prestimulus with a 4-msec lead time are independent of the intensity of the startle-eliciting stimulus. These findings suggest that the inhibition effect is independent of the latency reduction effect and that both are independent of the absolute level of activation in the neural mechanisms responsible for the overt startle response.
在一系列实验中发现，在引发惊吓的刺激之前64毫秒出现的弱声刺激所产生的抑制量，不受在引发惊吓的刺激之前4毫秒出现的第二个弱声刺激的影响。同样，具有4毫秒前置时间的先行刺激所产生的潜伏期缩短量，不受具有64毫秒前置时间的先行刺激的影响。最后发现，具有64毫秒前置时间的预刺激所产生的抑制量和具有4毫秒前置时间的预刺激所产生的潜伏期缩短量，均与引发惊吓的刺激强度无关。这些发现表明，抑制效应独立于潜伏期缩短效应，且二者均独立于负责明显惊吓反应的神经机制中的绝对激活水平。
