Kinesthetic and vestibular information modulate alpha activity during spatial navigation: a mobile EEG study.
Kinesthetic and vestibular information modulate alpha activity during spatial navigation: a mobile EEG study.
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DOI：
10.3389/fnhum.2014.00071
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发表时间：
2014
影响因子：
2.9
通讯作者：
König P
中科院分区：
文献类型：
--
作者：
Ehinger BV;Fischer P;Gert AL;Kaufhold L;Weber F;Pipa G;König P
在日常生活中，涉及运动的空间导航提供了一致的视觉、前庭和动觉信息，这些信息需要整合。然而，先前关于导航过程中人类大脑活动的研究主要集中在固定设置上，而忽略了前庭和动觉反馈。我们工作的目的是揭示这些感觉模式对皮层处理的影响。我们开发了一种完全沉浸式的虚拟现实设置，结合高密度移动脑电图（EEG）。参与者走过三角形的一条腿，原地转弯，继续沿着第二条腿走，最后指出他们开始的位置。前庭和动觉信息要么作为孤立的信息来源联合提供，要么在2 × 2全因子受试者内设计中根本不提供。对脑电信号进行独立分量聚类处理，计算时频谱图。在顶叶、枕叶和颞叶簇中，我们检测到在转动运动中α抑制，这与视觉注意处理的需求增加有关，与先前固定研究报告的结果非常相似。这种减少在所有条件下都存在，因此似乎可以推广到更自然的环境中。然而，在不一致的条件下，当不同的感觉模式不匹配时，下降明显更强。此外，在更多的前部区域，我们发现只提供前庭信息而不提供动觉信息会导致α增加。这些观察结果表明，静态实验忽略了感觉反馈的重要方面。因此，为了更全面地了解空间导航的神经关联，开发更自然的实验环境是很重要的。
In everyday life, spatial navigation involving locomotion provides congruent visual, vestibular, and kinesthetic information that need to be integrated. Yet, previous studies on human brain activity during navigation focus on stationary setups, neglecting vestibular and kinesthetic feedback. The aim of our work is to uncover the influence of those sensory modalities on cortical processing. We developed a fully immersive virtual reality setup combined with high-density mobile electroencephalography (EEG). Participants traversed one leg of a triangle, turned on the spot, continued along the second leg, and finally indicated the location of their starting position. Vestibular and kinesthetic information was provided either in combination, as isolated sources of information, or not at all within a 2 × 2 full factorial intra-subjects design. EEG data were processed by clustering independent components, and time-frequency spectrograms were calculated. In parietal, occipital, and temporal clusters, we detected alpha suppression during the turning movement, which is associated with a heightened demand of visuo-attentional processing and closely resembles results reported in previous stationary studies. This decrease is present in all conditions and therefore seems to generalize to more natural settings. Yet, in incongruent conditions, when different sensory modalities did not match, the decrease is significantly stronger. Additionally, in more anterior areas we found that providing only vestibular but no kinesthetic information results in alpha increase. These observations demonstrate that stationary experiments omit important aspects of sensory feedback. Therefore, it is important to develop more natural experimental settings in order to capture a more complete picture of neural correlates of spatial navigation.
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影响因子：
3
作者：
Goeke CM;König P;Gramann K
通讯作者：
Gramann K
影响因子：
3.2
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影响因子：
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作者：
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