Effects of foreperiod duration on reflexive and voluntary responses to intense noise bursts.
Effects of foreperiod duration on reflexive and voluntary responses to intense noise bursts.
复制标题
前段时间持续时间对强烈噪声爆发的反射性和自愿反应的影响。
DOI：
10.1111/j.1469-8986.1997.tb01738.x
复制
发表时间：
1997
期刊：
影响因子：
3.7
通讯作者：
Hackley,SA
中科院分区：
文献类型：
--
作者：
Sollers3rd,JJ;Hackley,SA
The question of whether a common mechanism underlies the facilitation of voluntary and reflexive reactions by a warning stimulus was investigated in two experiments. In both studies, the foreperiod preceding an intense noise burst was manipulated within and between blocks of trials. Previous reaction time experiments have shown that individuals respond fastest at the shortest foreperiod for between‐block manipulations and fastest at the longest foreperiod when foreperiod duration is varied unpredictably from trial to trial. In the present research, this pattern was found for voluntary hand‐grip responses, but acoustic startle blinks were facilitated at long foreperiods for both within‐ and between‐block manipulations. Invariance of the trisynaptic postauricular reflex across foreperiod conditions was evidence against any general activation of low‐level motor pathways by warning stimuli. Analyses of nonreflexive lid movements subsequent to startle blink suggested that inhibition of spontaneous blinking during the foreperiod may have contributed to the unexpected divergence between voluntary reactions and eyeblink reflexes.
