Visually induced gamma‐band responses to coherent and incoherent motion: a replication study
Visually induced gamma‐band responses to coherent and incoherent motion: a replication study
复制标题
视觉诱导的伽玛带对相干和非相干运动的响应：一项复制研究
DOI：
10.1097/00001756-199707280-00031
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发表时间：
1997
期刊：
影响因子：
1.7
通讯作者：
Brigitte Rochstroh
中科院分区：
文献类型：
--
作者：
Matthias M. Müller;M. Junghöfer;T. Elbert;Brigitte Rochstroh
目前的研究是基于早期的发现，即观察到一根连贯移动的长条会诱发人类的伽马带活动。在出现两个非相干移动的短条时，eeg - γ波段的功率降低。目前的研究证明了这种皮层活动模式的可复制性，并说明了其地形的主体间可变性。此外，研究人员还检测了皮质α活动，以测试γ波段活动是否可能反映α波谐波的变化。结果表明，诱导的伽玛波段活动不可能次于α波振幅的变化，因为后者既需要在刺激运动时两个频段的时间过程相似，也需要相同的地形模式。目前的研究结果表明，伽马和α波段的振荡是两种不同的大脑活动，具有不同的功能含义。
THE present study was based on earlier findings that the observation of a coherently moving long bar induced gamma-band activity in humans. The power in the EEG-gamma-band was reduced during the presentation of two incoherently moving short bars. The present study demonstrates the replicability of this cortical activity pattern and illustrates intersubjective variability in its topography. In addition, cortical alpha-activity was examined to test whether gamma-band activity might reflect changes in harmonics of alpha waves. Results indicate that induced gamma-band activity cannot be secondary to changes in the amplitude of alpha waves, since the latter would require both a similar time course of both frequency bands while stimuli are in motion and an identical topographical pattern. The present results suggest that oscillations in the gamma- and the alpha-bands are two different brain activities, with different functional implications.