CS and US duration effects in one-trial simultaneous fear conditioning as assessed by conditioned suppression of licking in rats
CS and US duration effects in one-trial simultaneous fear conditioning as assessed by conditioned suppression of licking in rats
复制标题
通过条件性抑制大鼠舔舐来评估一项试验同时恐惧调节中的 CS 和 US 持续时间效应
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
J. Ayres
中科院分区：
文献类型：
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作者：
P. E. Burkhardt;J. Ayres
在三个实验中，大鼠同时接受一次听觉条件刺激（CS）和一次非条件刺激（US）。随后，在大鼠舔饮管取水的同时呈现CS，并将CS引起的舔食抑制作为CS条件下的兴奋指标。研究发现，条件反射的增加是CS-US重叠时间和US持续时间的联合函数。证据表明，由于短暂的CS-US重叠导致的弱条件反射可以通过将US延长到CS终止后而增加。然而，在美国终止后延长CS持续时间并没有增强条件反射；事实上，在美国终止后延长60秒的CS显著削弱了条件反射。这表明，这些结果揭示了在最近的文献同步条件作用的差异。
In three experiments, rats received a single presentation of an auditory conditioned stimulus (CS) beginning simultaneously with an electric grid-shock unconditioned stimulus (US). Later, the CS was presented while the rats licked a drinking tube for water, and CS-elicited suppression of licking was taken as an index of the excitation conditioned to the CS. It was found that conditioning increased as a joint function of the duration of CS-US overlap and US duration. The evidence suggested that weak conditioning due to a brief CS-US overlap could be increased by extending the US beyond CS termination. Extending CS duration beyond US termination, however, did not strengthen conditioning; indeed, extending the CS 60 sec beyond US termination weakened conditioning significantly. It is suggested that these results shed light on a discrepancy in the recent literature on simultaneous conditioning.