Stimulus Frequency Dependence of the Transient Oscillatory Auditory Evoked Responses (40 Hz) Studied by Electric and Magnetic Recordings in Human
Stimulus Frequency Dependence of the Transient Oscillatory Auditory Evoked Responses (40 Hz) Studied by Electric and Magnetic Recordings in Human
复制标题
通过人体电记录和磁记录研究瞬态振荡听觉诱发反应 (40 Hz) 的刺激频率依赖性
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
C. Pantev
中科院分区：
文献类型：
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作者：
O. Bertrand;C. Pantev
在过去的几年里，几项研究的目标是提出大脑电活动的特定功能作用，其特征是围绕40赫兹的振荡，即所谓的伽马频段活动。埃克霍恩等人。(1988)和Gray et al.(1989)的研究表明，在视觉皮质中，在适当的视觉刺激后，空间上不同的细胞子集以相干的脉冲形式(在40-60赫兹)发射。因此，有人认为这些同步的伽马带活动参与了物体识别中潜在的特征绑定的基本机制。在人类听觉通道中也观察到了伽马频段中的振荡响应，这是由两种稳态中的一种引起的(Galumbers等人。1981)或瞬时刺激(Pantev等人1991)在头皮上记录。这些记录在头部表面的伽马频段反应，当然是由于大量神经元的作用，如何与脑内记录的同步节律活动有关，并代表非常局部的皮质区域的少数神经元，仍然是一个有争议的问题。
In the last years, several studies aimed to propose a specific functional role to electrical brain activities characterized by oscillations around 40 Hz, the so-called gamma-band activity. Eckhorn et al. (1988) and Gray et al. (1989) have shown that, in the visual cortex, a spatially disparate subset of cells fires in coherent bursts (in the range 40–60 Hz) after appropriate visual stimuli. It has thus been suggested that these synchronous gamma-band activities participate to fundamental mechanism underlying feature binding in object recognition. The observation of oscillatory response in the gamma-band has also been reported in human auditory modality, elicited by either steady-state (Galambos et al. 1981) or transient stimulation (Pantev et al. 1991) recorded over the scalp. How these gamma-band responses, recorded on the head surface and certainly due to large populations of neurons, relate to the synchronous rhythmic activities recorded intracranially and representing few neurons in very focal cortical area, is still a question of debate.