Anxious apprehension and anxious arousal are central transdiagnostic anxiety dimensions and have been linked to divergent patterns of frontal and parietal alpha asymmetry. The present study examined the relationship between alpha asymmetry and anxiety dimensions in 130 individuals whose electroencephalogram (EEG) was recorded at rest. We applied a 2 (anxious apprehension: low vs. high) × 2 (anxious arousal, low vs. high) design to contrast brain lateralization in four groups. Results revealed that anxious apprehension was associated with more left-than-right frontal brain activity in the lower alpha band, an effect driven by decreased right frontal activity. Exploratory analyses showed more left-than-right brain activity at central sites associated with anxious apprehension. Parietal activity was not lateralized as a function of anxiety dimensions. Taken together, the current results support that anxious apprehension is associated with more left-than-right frontal and central activity, and suggest a broader distribution of alpha asymmetries associated with anxious apprehension than previously thought.

焦虑的忧虑和焦虑的唤醒是主要的经诊断性焦虑维度，并与额叶和顶叶α不对称的不同模式有关。本研究检查了130名静息脑电图（EEG）的个体的α不对称性与焦虑量之间的关系。我们应用了2（焦虑的担忧：低与高）×2（焦虑的唤醒，低与高）设计来对比四组的大脑偏侧化。结果显示，焦虑忧虑与较低的α波段中左额比右额大脑活动有关，这是由右额叶活动减少导致的。探索性分析显示，与焦虑忧虑相关的中枢部位大脑活动多于右眼。顶叶活动并未根据焦虑的程度而偏侧化。