Time-frequency analysis of event-related potentials associated with the origin of the motor interference effect from dangerous objects
Time-frequency analysis of event-related potentials associated with the origin of the motor interference effect from dangerous objects
复制标题
与危险物体的电机干扰效应起源相关的事件相关电位的时频分析
DOI：
10.1016/j.brainres.2018.01.005
复制
发表时间：
2018-03
期刊：
影响因子：
2.9
通讯作者：
Liu Peng
中科院分区：
文献类型：
--
作者：
Liu Peng
先前的研究表明，危险物体的运动干扰效应可能源于危险评估，而不是直接的反应抑制，危险条件下的顶叶P3振幅（代表危险评估）大于安全条件下的P3振幅（代表反应抑制），危险和安全条件下的额叶P3分量（代表反应抑制）差异不显著。然而，对于前部P3分量的无效效应存在另一种解释。具体来说，这种零效应可能归因于θ波段和δ波段振荡之间的抵消，只有θ波段振荡代表响应抑制。为了澄清这一问题，本研究利用短时傅里叶变换将事件相关电位数据分解到不同的频段。结果发现，在200 - 500 ms的时间窗内，额叶中部危险和安全条件下的θ波振荡差异不显著。相反，在100 - 660毫秒的时间窗内，与安全条件相比，右顶叶区域在危险条件下的α振荡减少。回归分析进一步表明，alpha振荡对右侧顶叶区P3振幅有显著影响。综上所述，实验结果表明，当个体在准备运动动作中遇到紧急危险物体时，个体可能倾向于主要评估潜在危险，而不是直接抑制对危险物体的准备运动动作。
Previous research has suggested that the motor interference effect of dangerous objects may originate from danger evaluations rather than direct response inhibition, as evidenced by a larger parietal P3 amplitude (which represents danger evaluations) under dangerous conditions than under safe conditions and an insignificant difference between dangerous and safe conditions in the frontal P3 component (which represents response inhibition). However, an alternative explanation exists for the null effect of the frontal P3 component. Specifically, this null effect may be attributed to cancellation between the theta and delta band oscillations, and only theta band oscillations represent response inhibition. To clarify this issue, the current study decomposed event-related potential data into different frequency bands using short-time Fourier transform. The results identified an insignificant difference of theta oscillations between dangerous and safe conditions in the mid-frontal area during a 200–500-ms time window. Instead, decreased alpha oscillations were identified in the dangerous compared with the safe condition in Go trials in the right parietal area during a 100–660-ms time window. Regression analyses further indicated that the alpha oscillations significantly contributed to the parietal P3 amplitude in the right parietal area. In summary, the results indicated that when an emergent dangerous object is encountered during the execution of prepared motor actions, an individual may tend to chiefly evaluate the potential dangerousness rather than directly suppress the prepared motor actions toward the dangerous object.
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DOI：
10.1177/155005940103200307
发表时间：
2001-07-01
期刊：
CLINICAL ELECTROENCEPHALOGRAPHY
影响因子：
--
作者：
Demiralp, T;Ademoglu, A
通讯作者：
Ademoglu, A
影响因子：
8.6
作者：
Michael X. Cohen
通讯作者：
Michael X. Cohen
影响因子：
1.9
作者：
A. Walker
通讯作者：
A. Walker
影响因子：
2.9
作者：
Kirmizi-Alsan, Elif;Bayraktaroglu, Zubeyir;Demiralp, Tamer
通讯作者：
Demiralp, Tamer
影响因子：
2.6
作者：
EIMER, M
通讯作者：
EIMER, M