Parada Mayte, Gérard Marina, Larcher Kevin, Dagher Alain, Binik Yitzchak M
Department of Psychology, McGill University, Montreal, QC, Canada.
Department of Psychology, McGill University, Montreal, QC, Canada.
J Sex Med. 2016 Oct;13(10):1508-22. doi: 10.1016/j.jsxm.2016.08.008. Epub 2016 Sep 7.
Studies investigating brain indices of sexual arousal have begun to elucidate the brain's role in processing subjective arousal; however, most research has focused on men, used discrete ratings of subjective arousal, and used stimuli too short to induce significant arousal in women.
To examine brain regions modulated by changes in subjective sexual arousal (SSA) rating intensity in men and women.
Two groups (20 men, 20 women) viewed movie clips (erotic or humorous) while continuously evaluating changes in their SSA using a Likert-like scale (0 = not aroused, 10 = most aroused) and answering discrete questions about liking the movies and wanting sexual stimulation. Brain activity was measured using functional magnetic resonance imaging.
Blood oxygen level-dependent responses and continuous and discrete measurements of sexual arousal.
Erotic movies induced significant SSA in men and women. No sex difference in mean SSA was found in response to the erotic movies on continuous or discrete measurements. Several brain regions were correlated with changes in SSA. Parametric modulation with rating intensity showed a specific group of regions within the parietal lobe that showed significant differences in activity among low, medium, and high SSA.
Multiple regions were concordant with changes in SSA; however, a subset of regions in men and women was modulated by SSA intensity, a subset previously linked to attentional processes, monitoring of internal body representation, and processing of sensory information from the genitals. This study highlights that similar brain regions are activated during subjective assessment of sexual arousal in men and women. The data further highlight the fact that SSA is a complex phenomenon made up of multiple interoceptive and attentional processes.
研究性唤起的大脑指标的研究已开始阐明大脑在处理主观唤起中的作用；然而，大多数研究都集中在男性身上，使用主观唤起的离散评分，并且使用的刺激时间过短，无法在女性中诱发显著的唤起。
研究男性和女性主观性唤起（SSA）评分强度变化所调节的脑区。
两组（20名男性，20名女性）观看电影片段（色情或幽默），同时使用类似李克特量表（0 = 未唤起，10 = 最高唤起）持续评估其SSA的变化，并回答有关对电影的喜好和对性刺激的渴望的离散问题。使用功能磁共振成像测量大脑活动。
血氧水平依赖反应以及性唤起的连续和离散测量。
色情电影在男性和女性中均诱发了显著的SSA。在连续或离散测量中，对色情电影的反应中未发现平均SSA存在性别差异。几个脑区与SSA的变化相关。与评分强度的参数调制显示，顶叶内的一组特定区域在低、中、高SSA的活动中存在显著差异。
多个脑区与SSA的变化一致；然而，男性和女性的一部分脑区受到SSA强度的调节，这部分脑区先前与注意力过程、内部身体表征的监测以及来自生殖器的感觉信息的处理有关。本研究强调，在男性和女性对性唤起的主观评估过程中，类似的脑区会被激活。数据进一步强调了SSA是一种由多个内感受和注意力过程组成的复杂现象这一事实。
