性取向影响神经对微妙的社会侵略信号的反应
Katrin T Lübke1, Dunja Storch2, Bettina M Pause2
1Department of Experimental Psychology, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225, Düsseldorf, Germany. katrin.luebke@uni-duesseldorf.de.
Archives of sexual behavior
|July 27, 2023
概括
同性恋男性表现出对男性侵略线索的强烈大脑反应,这表明社会情感敏感度增强. 性取向没有影响女性对这些社会侵略信号的处理.
科学领域:
- 神经科学是一个神经科学.
- 心理学 心理学 心理学
- 进化生物学 进化生物学
背景情况:
- 了解大脑对社会侵略信号的反应对于社会互动至关重要.
- 性取向对处理这些信号的影响仍未得到充分探索.
- 以前的研究表明,性取向和社会特征之间存在进化联系.
研究的目的:
- 研究同性恋和异性恋男性和女性对社会侵略线索 (气味和面部表情) 的大脑反应.
- 为了确定性取向是否调节攻击信号的处理.
- 探索与性取向相关的侵略信号处理的神经相关性.
主要方法:
- 在侵略和控制条件下从男性和女性收集下汗液.
- 向同性恋和异性恋男女提供汗水样本和面部表情 (愤怒,中立).
- 记录了脑电图 (EEG) 来分析与化学传感事件相关的潜能 (CSERPs) 和与事件相关的潜能 (ERPs),并使用低分辨率的电磁断层扫描来计算神经元源.
主要成果:
- 与异性恋男性相比,同性恋男性对男性侵略性汗液的脑反应增强 (P3-1幅度更大),与右下额头 (IFG) 激活有关.
- 同性恋男性对愤怒的男性面孔和女性面孔的延迟时间较长,与异性恋男性不同.
- 没有观察到性取向对女性处理侵略性,汗水或愤怒表达的显著影响.
结论:
- 同性恋男性表现出化学感官攻击信号的优先处理,表明通过IFG激活微调的社会情感敏感性和情绪调节.
- 同性恋男性也处理视觉攻击信号的相对相关性,如N170延迟差异所示.
- 研究结果支持进化理论,将同性吸引力与促进社会融合的特征联系起来.
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