Effect of Visuospatial Attention on the Sensorimotor Gating System
Effect of Visuospatial Attention on the Sensorimotor Gating System
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DOI：
10.3389/fnbeh.2019.00001
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发表时间：
2019-01-15
影响因子：
3
通讯作者：
Kohno, Yutaka
中科院分区：
文献类型：
--
作者：
Ishii, Daisuke;Takeda, Kotaro;Kohno, Yutaka
多种感觉方式的整合使我们能够适应外部世界的环境。众所周知，视觉刺激会干扰听觉信息的处理，这与注意力的能力有关。此外，视觉空间注意具有偏侧性。目前还不清楚这种视觉空间注意的偏侧性是否会影响听觉刺激的处理。感觉运动门控系统是一种神经过程，它在大脑中从环境刺激中过滤掉不必要的刺激。前脉冲抑制（Prepulse inhibition，PPI）是感觉运动门控系统的一种操作措施，它是指较弱的前刺激（prepulse），如视觉刺激，抑制由随后的强烈惊吓刺激（pulse），如音调引起的惊吓反射。因此，我们研究了在“休息”任务（低注意条件）和“选择性注意”任务（高注意条件）中，来自左或右视觉空间的视觉刺激是否影响感觉运动门控系统。在选择性注意任务中，我们发现在左视野和双侧视野呈现的目标前脉冲比在右视野呈现的目标前脉冲更能抑制惊吓反射。相比之下，在无靶前脉冲条件下PPI没有偏侧性，在静息任务中PPI也没有偏侧性。这些结果表明，视空间注意的偏侧性影响感觉运动门控系统依赖于注意条件。此外，视觉信息处理的过程在左脑和右脑之间可能不同。
The integration of multiple sensory modalities allows us to adapt to the environment of the outside world. It is widely known that visual stimuli interfere with the processing of auditory information, which is involved in the ability to pay attention. Additionally, visuospatial attention has the characteristic of laterality. It is unclear whether this laterality of visuospatial attention affects the processing of auditory stimuli. The sensorimotor gating system is a neurological process, which filters out unnecessary stimuli from environmental stimuli in the brain. Prepulse inhibition (PPI) is an operational measure of the sensorimotor gating system, which a weaker prestimulus (prepulse), such as a visual stimulus, inhibits the startle reflex elicited by a subsequent robust startling stimulus (pulse) such as a tone. Therefore, we investigated whether the visual stimulus from the left or right visual space affects the sensorimotor gating system in a "rest" task (low attentional condition) and a "selective attention" task (high attentional condition). In the selective attention task, we found that the target prepulse presented in the left and bilateral visual fields suppressed the startle reflex more than that presented in the right visual field. By contrast, there was no laterality of PPI in the no-target prepulse condition, and there was no laterality of PPI in the rest task. These results suggest that the laterality of visuospatial attention affects the sensorimotor gating system depending on the attentional condition. Moreover, the process of visual information processing may differ between the left and right brain.