位于昆虫头的正面，包括蜕裂线侧臂之下、两条额颊沟之间和额唇基沟之上的区域，单眼即着生在额区。
额区是WMC的好发部位，依次为顶枕区、颞区、基底节和幕下。
WMC was most common in frontal region, followed by parietooccipital region, temporal region, basal ganglia, and infratentorial area.
额区和中线部位为高同步区，与后联合区对应的后脑区为低同步区。
The high synchronization was found at the frontal and midline brain regions and the low synchronization at the rear brain areas.
应用脑波超慢涨落分析方法，观察了气功意念导引时左右额区及左右枕区脑电波变化。
Using brain super-slow encephalofluctuography technology, changes on EEG at anterior and posterior brain areas, associated with Qigong guiding mind were studied.
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