Rhythmic gain control during supramodal integration of approximate number
Rhythmic gain control during supramodal integration of approximate number
复制标题
近似数超模态积分期间的节律增益控制
DOI：
10.1016/j.neuroimage.2015.12.024
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发表时间：
2016
期刊：
影响因子：
5.7
通讯作者：
Summerfield
中科院分区：
文献类型：
--
作者：
Spitzer;Blankenburg;Summerfield
根据一种观点，神经振荡及时构建信息处理，决定感官输入对行为的影响是强还是弱。最近的研究表明，在视觉输入的顺序整合过程中，处于缓慢（1-3 Hz）首选阶段的刺激，内源性脑电图活动在随后的判断中具有更大的权重。在这里，我们问了两个问题。首先，这种现象是特定模态的，还是超模态的？其次，这种效应是发生在顺序编码层面，还是仅发生在决策形成过程中？我们分析了健康人类参与者的头皮脑电图记录，同时他们比较了两个连续时间间隔（N1 和 N2）内视觉、听觉或体感脉冲的大致数量。尽管不同领域诱发的活动存在差异，但在所有三种模式中都观察到了共同的、缓慢振荡（约 3 Hz）的选择预测信号，其最大程度与脉冲起始一致。至关重要的是，该信号在 N2 期间（正在形成决策时）存在，但在 N1 期间不存在（此时感知信息被编码，但无法做出决策）。换句话说，顺序处理过程中的节奏增益控制是一种超模态现象，在信息整合到分类决策时发生。
According to one view, neural oscillations structure information processing in time, determining whether sensory inputs have a strong or weak impact on behavior. Recent work showed that during sequential integration of visual inputs, stimuli that fall in the preferred phase of slow (1–3 Hz), endogenous EEG activity carry greater weight in subsequent judgment. Here, we asked two questions. Firstly, is this phenomenon modality-specific, or is it supramodal? Secondly, does this effect occur at the level of sequential encoding, or only during decision formation? We analyzed scalp EEG recordings from healthy human participants while they compared the approximate number of visual, auditory or somatosensory pulses in two successive intervals (N1 and N2). Despite differences in activity evoked in different domains, a common, slowly-oscillating (~ 3 Hz) choice-predictive signal was observed in all three modalities with a maximum coincident with pulse onset. Critically, this signal was present during N2 (when a decision was being formed) but absent during N1 (when perceptual information was encoded, but no decision could be made). In other words, rhythmic gain control during sequential processing is a supramodal phenomenon that occurs while information is integrated towards a categorical decision.
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影响因子：
1.8
作者：
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影响因子：
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