TEMPORAL ACUITY IN AUDITORY FUNCTION IN THE RAT - REFLEX INHIBITION BY BRIEF GAPS IN NOISE
TEMPORAL ACUITY IN AUDITORY FUNCTION IN THE RAT - REFLEX INHIBITION BY BRIEF GAPS IN NOISE
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DOI：
10.1037/0735-7036.96.6.945
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发表时间：
1982-01-01
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影响因子：
--
通讯作者：
ISON, JR
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文献类型：
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作者：
ISON, JR
先前的研究结果表明，在大鼠的声惊吓反射被抑制，如果一个相对较弱的刺激之前的惊吓诱发音爆发。本实验探讨了白色噪声中短暂的沉默期（间隙）对12只Long-Evans hooded大鼠惊吓反射的影响，以描述听觉系统时间分辨力的极限。短暂的沉默期确实抑制了反射行为，并确定了2个负责的过程。其中之一在间隙和惊吓音之间190毫秒的提前时间时最为明显。它产生了一个线性递减的反射表达的动态范围为0-7毫秒和时间敏锐度的阈值为3.5毫秒的估计。第二个是明显的，主要是在一个40毫秒的刺激间隔，并在至少40毫秒的动态范围内的线性效应。短暂的差距有一个更大的抑制作用，在190毫秒的间隙和惊吓刺激之间的间隔，延长差距有其更大的影响，在40毫秒的间隔。第一个过程被确定为反射抑制，它对铅刺激的感觉特性敏感。第二个过程被确定为感觉适应，由噪声暴露产生，但被沉默所掩盖。(47参考）（PsycINFO数据库记录（c）2016阿帕，保留所有权利）
Previous results show that the acoustic startle reflex in the rat is inhibited if a relatively weak stimulus precedes the startle-eliciting tone burst. The present 5 experiments explored the effect of brief silent periods (gaps) in white noise on the startle reflex in order to describe the limits of temporal resolution in the auditory system of 12 Long-Evans hooded rats. Brief silent periods did depress reflex behavior, and 2 responsible processes were identified. One was most evident at a 190-msec lead time between gap and startle tone. It yielded a linear decrement in reflex expression over a dynamic range of 0–7 msec and an estimate for the threshold of temporal acuity of 3.5 msec. The 2nd was evident primarily at a 40-msec interstimulus interval and had a linear effect over a dynamic range of at least 40 msec. Brief gaps had a greater inhibitory effect at the 190-msec interval between gap and startle stimulus; prolonged gaps had their greater effect at the 40-msec interval. The 1st process was identified as reflex inhibition, which is sensitive to the sensory properties of the lead stimulus. The 2nd process was identified as sensory adaptation, produced by noise exposure but unmasked by silence.(47 ref)(PsycINFO Database Record (c) 2016 APA, all rights reserved)