Rostami Mohammad, Faridi Farnaz, Khosrowabadi Reza
Department of Psychology, Faculty of Psychology and Educational Sciences, Allameh Tabatabaie University, Tehran, Iran.
Institute for Cognitive and Brain Sciences, Shahid Beheshti University, Tehran, Iran.
Basic Clin Neurosci. 2022 Nov-Dec;13(6):883-900. doi: 10.32598/bcn.2021.1904.1. Epub 2022 Nov 1.
It has been shown that intelligence as a general mental ability is related to the structure and function of the brain regions. However, the specificity of these regional dependencies to the intelligence scores in the typical and atypical developed individuals needs to be well understood. In this study, we hypothesized that neural correlates of IQ should not have a fixed pattern rather they must follow a dynamic pattern to compensate for the functional deficits caused by a neurodevelopmental disorder. Therefore, electroencephalography (EEG) correlates of normal IQ in various subtypes of attention deficit hyperactive disorder (ADHD) were compared with a group of healthy controls.
Sixty-three ADHD subjects comprising combined, inattentive, and hyperactive individuals diagnosed by a psychiatrist using structural clinical interview for DSM-V, and 46 healthy controls with similar normal IQ scores were recruited in this study. The subjects' EEG data were then recorded during an eye-closed resting condition. The subjects' intelligence level was measured by Raven's standard progressive matrices. Then, the association between IQ and the power of the EEG signal was computed in the conventional frequency bands. Subsequently, topographical representations of these associations were compared between the groups.
Our results demonstrated that the association between IQ score and EEG power is not the same in various ADHD subtypes and healthy controls.
This finding suggests a compensatory mechanism in ADHD individuals for changing the regional oscillatory pattern to maintain the IQ within a normal range.
研究表明，作为一种一般心理能力的智力与大脑区域的结构和功能有关。然而，需要深入了解这些区域依赖性对于典型和非典型发育个体智力分数的特异性。在本研究中，我们假设智商的神经关联不应具有固定模式，而必须遵循动态模式以补偿神经发育障碍引起的功能缺陷。因此，我们将注意缺陷多动障碍（ADHD）各亚型中正常智商的脑电图（EEG）关联与一组健康对照进行了比较。
本研究招募了63名ADHD受试者，包括经精神科医生使用DSM-V结构临床访谈诊断的合并型、注意力不集中型和多动型个体，以及46名智商分数正常的健康对照。然后在闭眼休息状态下记录受试者的EEG数据。通过瑞文标准渐进矩阵测量受试者的智力水平。然后，在传统频段计算智商与EEG信号功率之间的关联。随后，比较了两组之间这些关联的地形图表示。
我们的结果表明，智商分数与EEG功率之间的关联在不同ADHD亚型和健康对照中并不相同。
这一发现表明ADHD个体存在一种补偿机制，通过改变区域振荡模式将智商维持在正常范围内。
