Attentional modulation of short- and long-lead-interval modification of the acoustic startle eyeblink response:: comparing auditory and visual prestimuli
Attentional modulation of short- and long-lead-interval modification of the acoustic startle eyeblink response:: comparing auditory and visual prestimuli
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DOI：
10.1016/s0167-8760(99)00019-7
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发表时间：
1999-06-01
影响因子：
3
通讯作者：
Dawson, ME
中科院分区：
文献类型：
--
作者：
Böhmelt, AH;Schell, AM;Dawson, ME
我们实验室的研究表明，短导联间隔和长导联间隔的导联刺激对惊吓的改变是由刺激重要性调节的。音调持续时间判断任务中的显着刺激会产生增强的短导联间隔惊吓抑制以及明显的长导联间隔惊吓促进。本研究的目的是在平衡的受试者内设计（实验一）或受试者间设计（实验二）中比较以简单视觉刺激作为主导刺激的色调。结果表明，与视觉引导刺激相比，听觉引导刺激产生更多的短引导间隔抑制，但产生相当数量的长引导间隔惊吓促进，这在独立于感觉方式的待参加试验中显着增强。在实验一中，注意力操纵没有产生短引导间隔效应，但先前报道的注意力效应在实验二中得到了复制。结果表明，早期形态对惊吓修饰有影响，这通过不同的抑制水平反映出来。然而，模态和注意力的后期影响似乎反映了惊吓修正中独立于感觉模态的过程。 (C) 1999 Elsevier Science B.V. 保留所有权利。
Studies in our laboratory have shown that modification of startle by lead stimuli with short- and long-lead-intervals is modulated by stimulus significance. The significant stimulus in a tone duration judgement task generates enhanced short-lead-interval startle inhibition as well as pronounced long-lead-interval startle facilitation. The present study was designed to compare tones with simple visual stimuli as lead stimuli in a counterbalanced within-subjects design (Experiment I) or between-subjects design (Experiment II). The results show that auditory compared to Visual lead stimuli generate more short-lead-interval inhibition but comparable amounts of long-lead-interval startle facilitation, which was significantly enhanced on to-be-attended trials independent of sensory modality. The attentional manipulation did not yield short-lead-interval effects in Experiment I, but previously reported attention effects were replicated in Experiment II. The results suggest early modality effects on startle modification, reflected by the differing levels of inhibition. Late effects of both modality and attention, however, seem to reflect a sensory modality independent process in startle modification. (C) 1999 Elsevier Science B.V. All rights reserved.