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首页> 外文期刊>Experimental Brain Research >There are differences in cerebral activation between females in distinct menstrual phases during viewing of erotic stimuli: A fMRI study.
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There are differences in cerebral activation between females in distinct menstrual phases during viewing of erotic stimuli: A fMRI study.

机译：在功能性磁共振成像研究中，女性在不同月经期的大脑激活过程中存在差异。

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摘要

There is evidence that men experience more sexual arousal than women but also that women in mid-luteal phase experience more sexual arousal than women outside this phase. Recently, a few functional brain imaging studies have tackled the issue of gender differences as pertaining to reactions to erotica. The question of whether or not gender differences in reactions to erotica are maintained with women in different phases has not yet been answered from a functional brain imaging perspective. In order to examine this issue, functional MRI was performed in 22 male and 22 female volunteers. Subjects viewed erotic film excerpts alternating with emotionally neutral excerpts in a standard block-design paradigm. Arousal to erotic stimuli was evaluated using standard rating scales after scanning. Two-sample t-test with uncorrected P < 0.001 values for a priori determined region of interests involved in processing of erotic stimuli and with corrected P < 0.05 revealed gender differences: Comparing women in mid-luteal phase and during their menses, superior activation was revealed for women in mid-luteal phase in the anterior cingulate, left insula, and orbitofrontal cortex. A superior activation for men was found in the left thalamus, the bilateral amygdala, the anterior cingulate, the bilateral orbitofrontal, bilateral parahippocampal, and insular regions, which were maintained at a corrected P in the amygdala, the insula, and thalamus. There were no areas of significant superior activation for women neither in mid-luteal phase nor during their menses. Our results indicate that there are differences between women in the two cycle times in cerebral activity during viewing of erotic stimuli. Furthermore, gender differences with women in mid-luteal phases are similar to those in females outside the mid-luteal phase.
机译：有证据表明，男性比女性经历更多的性唤起，而且黄体中期的女性比该时期之外的女性经历的性唤起更多。最近，一些功能性脑成像研究已经解决了与对性欲反应有关的性别差异问题。从功能性脑成像的角度，尚未回答女性在不同阶段对性欲反应的性别差异是否得以维持的问题。为了检查这个问题，在22位男性和22位女性志愿者中进行了功能性MRI。受试者在标准的方块设计范例中观看了色情电影摘录与情感中性摘录的交替显示。扫描后，使用标准评分量表评估刺激性欲。两次样本t检验，未校正的P <0.001值用于先验确定的参与色情刺激处理的感兴趣区域，校正的P <0.05，表明性别差异：比较处于黄体中期和月经期间的女性，其上皮激活率较高。在前扣带回，左岛和眶额皮层的黄体中期处于女性状态。男性在左丘脑，双侧杏仁核，前扣带回，双侧眶额，双侧海马旁和岛状区域均表现出较高的激活作用，杏仁核，岛状和丘脑中的P维持在校正的P值。女性在黄体中期和月经期间都没有明显的明显激活区域。我们的结果表明，在观看色情刺激期间，在两个活动周期中，女性之间的大脑活动存在差异。此外，黄体中期的女性性别差异与黄体中期以外的女性相似。

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