Kulak Wojciech, Sobaniec Wojciech
Department of Pediatric Neurology and Rehabilitation, Medical University of Białystok, 15-274 Białystok, Poland.
NeuroRehabilitation. 2005;20(2):75-84.
Clinical assessment and imaging studies of twenty-six children with hemiparetic cerebral palsy (HCP) were conducted. For each child 20 artifact-free EEG epochs, each of 2 s duration were selected for spectral analysis to calculate spectral power and coherence functions. A fast Fourier transformation alogorithm of signal processing was used to obtain the power spectrum of each lead. The objective of this study was to estimate EEG spectral power as well as the interhemispheric (ICoh) and intrahemispheric (Hcoh) coherence in children with hemiparetic cerebral palsy (HCP) as compared with healthy children. Significant differences between the HCP and control children were noted in the distribution of the alpha, theta and delta rhythms over the left and right hemispheres. In this study we found significant differences between the HCP and control children in the distribution of alpha, theta, delta and beta rhythm over the left and right hemispheres. Significant differences between the HCP and control children were in the distribution of the theta rhythm over the right and left hemispheres. The lower ICoh at the temporal, parietal and occipital derivations in the alpha band implies hypoconnectivity between the right and left hemispheres. The HCoh asymmetry, which implies relative hypoconnectivity within the right and left hemispheres, suggests the functional hemispheric differentiation may be diminished in comparison with the controls.
对26名偏瘫型脑瘫（HCP）儿童进行了临床评估和影像学研究。为每个儿童选择20个无伪迹的脑电图时段，每个时段持续2秒，用于频谱分析以计算频谱功率和相干函数。使用信号处理的快速傅里叶变换算法获得每个导联的功率谱。本研究的目的是评估偏瘫型脑瘫（HCP）儿童与健康儿童相比的脑电图频谱功率以及半球间（ICoh）和半球内（Hcoh）相干性。在左右半球的α、θ和δ节律分布上，HCP儿童与对照儿童存在显著差异。在本研究中，我们发现HCP儿童与对照儿童在左右半球的α、θ、δ和β节律分布上存在显著差异。HCP儿童与对照儿童在左右半球的θ节律分布上存在显著差异。α波段颞部、顶叶和枕部导联处较低的ICoh意味着左右半球之间连接性降低。Hcoh不对称性意味着左右半球内相对连接性降低，表明与对照组相比，功能性半球分化可能减弱。
