Juvenile myoclonic epilepsy shows increased posterior theta, and reduced sensorimotor beta resting connectivity.

Juvenile myoclonic epilepsy shows increased posterior theta, and reduced sensorimotor beta resting connectivity.
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DOI:
10.1016/j.eplepsyres.2020.106324
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发表时间:
2020-07
期刊:
影响因子:
2.2
通讯作者:
Hamandi K
Hamandi K
中科院分区:
医学4区
文献类型:
--
作者:
Routley B;Shaw A;Muthukumaraswamy SD;Singh KD;Hamandi K

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我们使用跨标准 MEG 频段研究了 JME 中的全脑源空间连接。 JME 中后部 θ 和 α 频带的连接性增加,而感觉运动 β 频带的连接性减少。我们的研究结果强调了 JME 中唤醒和注意力后网络与运动系统之间相互作用的改变。尽管临床神经影像学检查正常,但青少年肌阵挛性癫痫 (JME) 中已显示出广泛的结构和功能性脑网络变化。我们试图使用脑磁图(MEG)和源空间连接分析来更好地定义这些变化,以实现最佳的神经生理学和解剖学定位。我们连续招募了 26 名接受静息态 MEG 记录的 JME 患者,以及 26 名年龄和性别匹配的对照。全脑连接性是通过自动解剖标记(AAL)图谱源空间MEG时间序列在感兴趣的传统频段δ(1−4Hz)、θ(4−8Hz)、α(8−13Hz)、β(13−30Hz)和γ(40−60Hz)中的相关性来确定的。我们使用线性约束最小方差 (LCMV) 波束形成器来提取所需频段的“虚拟传感器”的体素时间序列,然后使用特定于频率和节点的功率波动之间的相关性对每个 AAL 图集标签中的体素最大值进行连接分析,校正噪声、潜在的虚假连接和多重比较。我们发现,与对照组相比,JME 中后脑区域 θ 带的连接性增加,经多重比较的统计校正(校正 p< 0.05),而右前中央回和后中央回之间的感觉运动皮层 β 带的连接性降低(p< 0.05)。 JME 中静息态 MEG 连接性的改变包括后 θ 区连接性的增加(与影响注意力和唤醒的长距离连接相关的频带)以及 β 频带感觉运动连接性的减少。这些发现可能与 JME 中感觉运动网络的调节改变和癫痫易发状态有关。
We investigated whole brain source space connectivity in JME using across standard MEG frequency bands. Connectivity was increased in posterior theta and alpha bands in JME, and decreased in sensorimotor beta band. Our findings highlight altered interactions between posterior networks of arousal and attention and the motor system in JME. Widespread structural and functional brain network changes have been shown in Juvenile Myoclonic Epilepsy (JME) despite normal clinical neuroimaging. We sought to better define these changes using magnetoencephalography (MEG) and source space connectivity analysis for optimal neurophysiological and anatomical localisation. We consecutively recruited 26 patients with JME who underwent resting state MEG recording, along with 26 age-and-sex matched controls. Whole brain connectivity was determined through correlation of Automated Anatomical Labelling (AAL) atlas source space MEG timeseries in conventional frequency bands of interest delta (1−4 Hz), theta (4−8 Hz), alpha (8−13 Hz), beta (13−30 Hz) and gamma (40−60 Hz). We used a Linearly Constrained Minimum Variance (LCMV) beamformer to extract voxel wise time series of ‘virtual sensors’ for the desired frequency bands, followed by connectivity analysis using correlation between frequency- and node-specific power fluctuations, for the voxel maxima in each AAL atlas label, correcting for noise, potentially spurious connections and multiple comparisons. We found increased connectivity in the theta band in posterior brain regions, surviving statistical correction for multiple comparisons (corrected p < 0.05), and decreased connectivity in the beta band in sensorimotor cortex, between right pre- and post- central gyrus (p < 0.05) in JME compared to controls. Altered resting-state MEG connectivity in JME comprised increased connectivity in posterior theta – the frequency band associated with long range connections affecting attention and arousal - and decreased beta-band sensorimotor connectivity. These findings likely relate to altered regulation of the sensorimotor network and seizure prone states in JME.
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