Pahor Anja, Jaušovec Norbert
University of Maribor, Slovenia.
University of Maribor, Slovenia.
Int J Psychophysiol. 2014 Sep;93(3):322-31. doi: 10.1016/j.ijpsycho.2014.06.015. Epub 2014 Jul 3.
The objective of the study was to explore the influence of transcranial alternating current stimulation (tACS) on resting brain activity and on measures of fluid intelligence. Theta tACS was applied to the left parietal and left frontal brain areas of healthy participants after which resting electroencephalogram (EEG) data was recorded. Following sham/active stimulation, the participants solved two tests of fluid intelligence while their EEG was recorded. The results showed that active theta tACS affected spectral power in theta and alpha frequency bands. In addition, active theta tACS improved performance on tests of fluid intelligence. This influence was more pronounced in the group of participants that received stimulation to the left parietal area than in the group of participants that received stimulation to the left frontal area. Left parietal tACS increased performance on the difficult test items of both tests (RAPM and PF&C) whereas left frontal tACS increased performance only on the easy test items of one test (RAPM). The observed behavioral tACS influences were also accompanied by changes in neuroelectric activity. The behavioral and neuroelectric data tentatively support the P-FIT neurobiological model of intelligence.
该研究的目的是探讨经颅交流电刺激（tACS）对静息脑活动及流体智力测量指标的影响。对健康参与者的左顶叶和左额叶脑区施加θ波tACS，之后记录静息脑电图（EEG）数据。在假刺激/有效刺激后，参与者在记录EEG的同时完成两项流体智力测试。结果显示，有效θ波tACS影响了θ波和α波频段的频谱功率。此外，有效θ波tACS提高了流体智力测试的表现。这种影响在接受左顶叶区域刺激的参与者组中比在接受左额叶区域刺激的参与者组中更为明显。左顶叶tACS提高了两项测试（RAPM和PF&C）中难题项目的表现，而左额叶tACS仅提高了一项测试（RAPM）中简单题目的表现。观察到的tACS对行为的影响也伴随着神经电活动的变化。行为和神经电数据初步支持了智力的P-FIT神经生物学模型。
