University of Arizona, Department of Psychology, PO Box 210068, Tucson, AZ 85721-0068, United States.
Biol Psychol. 2012 Oct;91(2):283-91. doi: 10.1016/j.biopsycho.2012.06.010. Epub 2012 Jul 31.
Resting frontal encephalographic (EEG) asymmetry, often conceptualized as a trait marker for depression, is influenced by occasion-specific factors, including time of year and the time of day of the recording session as demonstrated recently (Peterson and Harmon-Jones, 2009). The current study examined the influence of seasonal and chronological variables on resting frontal asymmetry, and also assessed whether different reference montages or surface transformations were equally susceptible to these influences. In a direct replication attempt, contrary to previous findings, no simple time of year by time of day interaction was found. Time awake at recording, however, was an important moderating variable of the relationship between photoperiod and time of day. EEG asymmetry scores based on current-source density (CSD) transformed data, however, appeared less vulnerable to these influences, providing further evidence to suggest that the CSD transform may be advantageous for examining stable trait estimates of frontal EEG asymmetry.
静息额部脑电图（EEG）不对称性，通常被概念化为抑郁的特质标志物，受到特定场合因素的影响，包括最近（Peterson 和 Harmon-Jones，2009）所示的一年中的时间和记录时段的时间。本研究检查了季节性和时间变量对静息额部不对称性的影响，还评估了不同的参考导联或表面变换是否同样容易受到这些影响。在直接复制尝试中，与先前的发现相反，没有发现简单的季节与时辰的交互作用。然而，记录时的清醒时间是光周期与时间之间关系的重要调节变量。然而，基于电流源密度（CSD）变换数据的 EEG 不对称评分似乎不太容易受到这些影响，这进一步表明 CSD 变换可能有利于检查额部 EEG 不对称的稳定特质估计。
