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首页> 外文期刊>Clinical EEG and neuroscience: official journal of the EEG and Clinical Neuroscience Society (ENCS) >Electroencephalographic Activity Before and After Cognitive Effort in Children With Attention Deficit/Hyperactivity Disorder
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Electroencephalographic Activity Before and After Cognitive Effort in Children With Attention Deficit/Hyperactivity Disorder

机译：注意缺陷/多动障碍儿童认知努力前后的脑电图活动

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摘要

Numerous studies have detected elevated electroencephalographic (EEG) theta/beta ratio (TBR) or theta power in children with attention deficit/hyperactivity disorder (ADHD) and therefore TBR has been suggested to be a promising biomarker of ADHD. At the same time, recent theoretical models have emphasized the heterogeneity of ADHD and the notion that cognitive deficits in ADHD are not fixed but fluctuate according to contextual and state factors. Surprisingly, so far the context- or state-dependency of EEG abnormalities in ADHD has hardly been addressed. Therefore, in the current study, 3 minutes eyes closed resting EEG before and after execution of 3 n-back tasks were compared between 21 children with ADHD and 22 typically developing children. No difference between groups was found for TBR or theta power (or other frequency bands), neither before nor after task execution, indicating that enhanced TBR or theta power is not to be considered universal for the disorder. Hence, cautiousness is warranted in using these indices for diagnostic purposes in ADHD. Across groups, posterior theta power, as well as central and posterior beta power was attenuated after task execution, which was interpreted as the children experiencing a more alert state after cognitive effort. Yet, this EEG modulation was similar in both groups, providing no support for a context-or state-dependency of EEG abnormalities in ADHD. However, in light of the absence of any group differences in EEG parameters, further research is warranted.
机译：大量研究发现，患有注意力缺陷/多动障碍（ADHD）的儿童脑电图（EEG）的theta /β比（TBR）或theta功能升高，因此，TBR被认为是ADHD的一种有前途的生物标志物。同时，最近的理论模型强调了注意力缺陷多动症的异质性，以及注意力缺陷多动症的认知缺陷不是固定的而是根据情境和状态因素而波动的观念。令人惊讶的是，到目前为止，多动症中脑电图异常的背景或状态依赖性几乎没有得到解决。因此，在本研究中，比较了21例ADHD儿童和22例典型发育儿童在执行3次n-back任务之前和之后3分钟闭眼的静息EEG。在任务执行之前或之后，都没有发现TBR或theta功率（或其他频带）在组之间存在差异，这表明增强的TBR或theta功率对于该疾病不被认为是普遍的。因此，在将这些指标用于ADHD的诊断目的时必须谨慎。跨组，任务执行后后θ能力以及中枢和后β能力减弱，这被认为是儿童在认知努力后经历了更加机敏的状态。然而，两组的这种EEG调节相似，不支持ADHD中EEG异常的背景或状态依赖性。但是，鉴于脑电参数没有任何组间差异，有必要做进一步的研究。

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