Neuromagnetic evidence of synchronized spontaneous activity in the brain following repetitive sensory stimulation.
Neuromagnetic evidence of synchronized spontaneous activity in the brain following repetitive sensory stimulation.
复制标题
重复感觉刺激后大脑同步自发活动的神经磁证据。
DOI：
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发表时间：
1987
影响因子：
2.2
通讯作者：
A. Papanicolaou
中科院分区：
文献类型：
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作者：
L. Narici;G. Romani;C. Salustri;V. Pizzella;I. Modena;A. Papanicolaou
视觉和体感方式的神经磁测量显示，在重复刺激后，大脑持续以具有高度特异性光谱组成的振荡形式发出同步后放电。在视觉模态中，这种节律活动集中在静息α节律的频率处，并且最容易由相同频率的刺激引起。这表明，这种现象是由于同步的发电机负责的自然节律的稳态刺激，这些发电机的行为作为谐振振荡器。这种现象可以被称为同步自发活动（SSA）。这一现象的发现具有重要的意义，建模的动力学正常诱发和自发的大脑活动，以及了解病理条件，如光诱导癫痫。
Neuromagnetic measurements in the visual and somatosensory modalities reveal that, following repetitive stimulation, the brain persists in emitting synchronized after-discharges in the form of oscillations with highly specific spectral composition. In the visual modality, this rhythmic activity is centered at the frequency of the resting alpha rhythm and it is most readily induced by stimulation of the same frequency. This suggests that the phenomenon is due to synchronization of the generators responsible for the natural rhythms by the steady-state stimulation and that these generators behave as resonant oscillators. The phenomenon could then be referred to as Synchronized Spontaneous Activity (SSA). The discovery of this phenomenon has important implications for modelling the dynamics of normal evoked and spontaneous cerebral activity as well as for the understanding of pathological conditions such as photically induced epilepsies.