Resting oscillations and cross-frequency coupling in the human posteromedial cortex.
Resting oscillations and cross-frequency coupling in the human posteromedial cortex.
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DOI：
10.1016/j.neuroimage.2011.12.019
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发表时间：
2012-03
期刊：
影响因子：
5.7
通讯作者：
Parvizi, Josef
中科院分区：
文献类型：
--
作者：
Foster, Brett L.;Parvizi, Josef
关键词：
利用从人脑后半球间区域获取的罕见颅内记录，我们探究了静息状态下后内侧皮质（PMC）的振荡特性。PMC是默认模式网络的核心结构，该网络因其在静息状态下具有较高的活性而闻名。我们发现，静息状态下的PMC频谱功率在θ波段范围（4 - 7赫兹）达到峰值，并且与枕叶中在α波段范围（8 - 12赫兹）呈现峰值的相邻皮质部位有明显区别。此外，在静息状态下，PMC的θ振荡相位调节了正在进行的高γ（70 - 180赫兹）活动的幅度。这种跨频率调制的幅度被证明在与内在功能连接网络的功能性神经影像学研究中所观察到的相当的时间尺度上波动（约0.1赫兹）。PMC与其相邻皮质部位的典型振荡差异符合跨解剖边界的功能特化。这种差异可能反映了功能上相互连接的网络之间不同的振荡偏好。
Using rare intracranial recordings from the posterior interhemispheric region of the human brain, we explored the oscillatory properties of the posteromedial cortex (PMC) during rest. The PMC is a core structure of the default mode network, which is known for its higher activity during the resting state. We found that resting PMC spectral power peaked in the theta band range (4–7 Hz) and was clearly distinguishable from adjacent cortical sites in the occipital lobe displaying peaks in the alpha band range (8–12 Hz). Additionally, the phase of PMC theta oscillations modulated the amplitude of ongoing high gamma (70–180Hz) activity during the resting state. The magnitude of this cross-frequency modulation was shown to fluctuate at time scales comparable to those observed in functional neuroimaging studies of intrinsic functional connectivity networks (~0.1 Hz). The difference of canonical oscillations in the PMC compared to its adjacent cortical sites conforms to functional specialization across anatomical boundaries. Such differences may reflect separate oscillatory preferences between networks that are functionally connected.
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影响因子：
16.2
作者：
He, Biyu J.;Zempel, John M.;Snyder, Abraham Z.;Raichle, Marcus E.
通讯作者：
Raichle, Marcus E.
DOI：
10.1073/pnas.0504136102
发表时间：
2005-07-05
影响因子：
11.1
作者：
Fox, MD;Snyder, AZ;Raichle, ME
通讯作者：
Raichle, ME
影响因子：
3
作者：
Cohen, Michael X.
通讯作者：
Cohen, Michael X.
DOI：
10.1523/jneurosci.1296-11.2011
发表时间：
2011-05-25
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
Baria AT;Baliki MN;Parrish T;Apkarian AV
通讯作者：
Apkarian AV
影响因子：
2.5
作者：
Lakatos, P;Shah, AS;Schroeder, CE
通讯作者：
Schroeder, CE