Jausovec N, Jausovec K
Univerza v Mariboru, Pedagoska fakulteta, Koroska 160, 2000 Maribor, Slovenia.
Brain Res Cogn Brain Res. 2001 Aug;12(1):55-60. doi: 10.1016/s0926-6410(01)00029-5.
Differences in current density between high intelligent (IQ=127), and low intelligent individuals (IQ=87), while solving two oddball tasks (auditive and visual) were analyzed with low resolution brain electromagnetic tomography (LORETA). In highly intelligent individuals a decrease in the volume of activated cortical gray matter between the P300 onset and the P300 peak amplitude was observed. The EEG of low intelligent individuals showed a reverse pattern of cortical activity. In the auditive oddball task the decrease in the activated cortical volume in high intelligent individuals was accompanied by an increase in current density, and a more left hemispheric source location at maximum current density. The results suggest that high intelligent individuals more efficiently distributed their cognitive resources needed to cope with the oddball tasks.
运用低分辨率脑电磁断层扫描技术（LORETA）分析了高智商（IQ = 127）和低智商个体（IQ = 87）在完成两项异常刺激任务（听觉和视觉）时的电流密度差异。在高智商个体中，观察到从P300起始到P300峰值幅度期间，激活的皮质灰质体积减少。低智商个体的脑电图显示出相反的皮质活动模式。在听觉异常刺激任务中，高智商个体激活的皮质体积减少伴随着电流密度增加，且最大电流密度处的源位置更偏向左侧半球。结果表明，高智商个体能更有效地分配应对异常刺激任务所需的认知资源。
