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No intermodal interference effects of threatening information during concurrent audiovisual stimulation.
Neuropsychologia ( IF 2.6 ) Pub Date : 2019-11-27 , DOI: 10.1016/j.neuropsychologia.2019.107283
Kierstin M Riels 1 , Harold A Rocha 1 , Andreas Keil 1
Affiliation  

Changes in attention can result in sensory processing trade-off effects, in which sensory cortical responses to attended stimuli are heightened and responses to competing distractors are attenuated. However, it is unclear if competition or facilitation effects will be observed at the level of sensory cortex when attending to competing stimuli in two modalities. The present study used electroencephalogram (EEG) and frequency-tagging to quantitatively assess auditory-visual interactions during sustained multimodal sensory stimulation. The emotional content of a 6.66 Hz rapid serial visual presentation (RSVP) was manipulated to elicit well-established emotional attention effects, while a constant 63 dB tone with a 40.8 Hz modulation served as a concurrent auditory stimulus in two experiments. As a directed attention manipulation, participants were instructed to detect transient sound level events in the auditory stream in Experiment 1. To manipulate attention through threat anticipation, participants were instructed to expect an aversive noise burst after a higher 40.8 Hz modulated tone in Experiment 2. Each stimulus evoked reliable steady-state sensory cortical responses in all participants (n = 30) in both experiments. The visual cortical responses were modulated by the auditory detection task, but not by threat anticipation: Visual responses were smaller during auditory streams with a transient target as compared to uninterrupted auditory streams. Conversely, visual stimulus condition had no significant effects on auditory sensory cortical responses in either experiment. These results indicate that there is neither a competition nor facilitation effect of visual content on concurrent auditory sensory cortical processing. They further indicate that competition effects of auditory stream content on sustained visuocortical responses are limited to auditory target processing.

中文翻译:

在并发视听刺激过程中,威胁性信息没有多式联运干扰效应。

注意的改变可导致感觉处理权衡效果,其中对参与的刺激的感觉皮质反应增强,而对竞争性干扰物的反应减弱。然而,尚不清楚当以两种方式参与竞争性刺激时,是否会在感觉皮层水平观察到竞争或促进作用。本研究使用脑电图(EEG)和频率标签来定量评估持续多模式感官刺激期间的听觉-视觉相互作用。对6.66 Hz快速连续视觉呈现(RSVP)的情感内容进行了处理,以引起公认的情感注意效果,而在两个实验中,恒定的63 dB音调和40.8 Hz调制充当了同时的听觉刺激。作为定向注意力的操纵,在实验1中,要求参与者检测听觉流中的瞬态声级事件。要通过威胁预测来操纵注意力,在实验2中,要求参与者期望在更高的40.8 Hz调制音调之后产生厌恶性噪声爆发。在两个实验中所有参与者(n = 30)的状态感觉皮层反应。视觉皮层反应是通过听觉检测任务调节的,但不是通过威胁预测来调节的:与不间断的听觉流相比,具有短暂目标的听觉流的视觉反应较小。相反,在任何一个实验中,视觉刺激条件对听觉感觉皮质反应均无显着影响。这些结果表明视觉内容对同时的听觉感觉皮层加工没有竞争或促进作用。他们进一步表明,听觉流内容对持续的视觉皮质反应的竞争作用仅限于听觉目标处理。
更新日期:2019-11-27
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