No Sex Difference Found: Cues of Sexual Stimuli Activate the Reward System in both Sexes

No Sex Difference Found: Cues of Sexual Stimuli Activate the Reward System in both Sexes
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没有发现性别差异:性刺激的线索激活两性的奖励系统

DOI:
10.1016/j.neuroscience.2019.07.049
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发表时间:
2019
期刊:
影响因子:
3.3
通讯作者:
Strahler
Strahler
中科院分区:
医学3区
文献类型:
--
作者:
Weygandt;Leufgens;Schweckendiek;Strahler

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在西方社会,露骨的性材料(SEM)越来越多地使用。这种高使用率的一个原因可能是SEM的奖励特性,许多脑成像研究表明,在SEM呈现期间,奖励系统被激活。目前还不清楚为什么妇女使用SEM的程度明显低于男子。也许男性对刺激的反应更强烈-所谓的SEM线索-这表明SEM的出现,因此比女性更容易使用SEM。因此,本研究的目的是调查性别特异性的神经相关扫描电镜和扫描电镜线索。我们进一步感兴趣的人的特征是否特质性动机,在过去一个月的SEM使用的程度,以及目标导向的SEM使用的发病年龄影响SEM和SEM线索的神经反应。功能磁共振成像实验的试验包括一个期待阶段与SEM或中性线索和呈现阶段与SEM或中性刺激,分别。分析表明,奖励回路被SEM激活,但也被SEM线索激活。有一些性别差异的血流动力学反应SEM在介绍阶段,但没有在预期阶段的SEM线索在任何感兴趣的地区。被调查者特征的影响即使存在也很小。结果表明,性别特异性线索加工不能解释性别差异的使用SEM。
Sexually explicit material (SEM) is increasingly used in western societies. One reason for this high usage might be the rewarding property of SEM demonstrated in many brain imaging studies showing an activation of the reward system during the presentation of SEM. It is not yet well understood why women use SEM to a remarkably lesser extent than men. Maybe men react stronger to stimuli – so called SEM cues –, which signal the presentation of SEM and are therefore more vulnerable to use SEM than women. Therefore, the present study aimed at investigating the sex specific neural correlates towards SEM and SEM cues. We were further interested in whether person characteristics as trait sexual motivation, extent of SEM use in the last month, and age at onset of goal-oriented SEM use affect the neural responses to SEM and SEM cues. The trials of the fMRI experiment consisted of an expectation phase with SEM or neutral cues and a presentation phase with SEM or neutral stimuli, respectively. Analyses showed that the reward circuitry was activated by SEM, but also by SEM cues. There were some sex differences in hemodynamic responses to SEM during the presentation phase, but not during the expectation phase to SEM cues in any of the regions of interest. The influence of the investigated person characteristics was only small if existent. The results suggest that sex specific cue processing cannot explain sex differences in the use of SEM.
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