Ventral striatum activity when watching preferred pornographic pictures is correlated with symptoms of Internet pornography addiction
Ventral striatum activity when watching preferred pornographic pictures is correlated with symptoms of Internet pornography addiction
复制标题
DOI：
10.1016/j.neuroimage.2016.01.033
复制
发表时间：
2016-04-01
期刊：
影响因子：
5.7
通讯作者：
Maderwald, Stefan
中科院分区：
文献类型：
--
作者：
Brand, Matthias;Snagowski, Jan;Maderwald, Stefan
网络成瘾的一种类型是过度的色情消费，也被称为网络性或网络色情成瘾。神经成像研究发现，当参与者观看明确的性刺激时，与观看非明确的性/色情材料相比，腹侧纹状体更活跃。我们现在假设腹侧纹状体应该对偏好的色情图片做出反应，而不是非偏好的色情图片，并且在这种对比中腹侧纹状体的活动应该与网络色情成瘾的主观症状相关。我们对19名异性恋男性参与者进行了图片范式研究，包括偏好和非偏好的色情材料。受试者必须评估每张图片的兴奋程度、不愉快程度和与理想状态的接近程度。来自偏好类别的照片被评为更令人兴奋，不那么不愉快，更接近理想。与非偏好图片相比，偏好条件下的腹侧纹状体反应更强。相比之下，腹侧纹状体活动与自我报告的网络色情成瘾症状相关。主观症状严重程度也是回归分析中唯一显著的预测因子，腹侧纹状体反应是因变量，主观症状是网络色情成瘾、一般性兴奋、性亢进、抑郁、人际敏感和最后几天的性行为是预测因子。研究结果支持了腹侧纹状体处理与主观偏好的色情材料有关的奖励预期和满足的作用。腹侧纹状体的奖赏预期机制可以从神经学的角度解释为什么有特定偏好和性幻想的人有失去对网络色情消费控制的风险。(C) 2016 Elsevier Inc.版权所有。
One type of Internet addiction is excessive pornography consumption, also referred to as cybersex or Internet pornography addiction. Neuroimaging studies found ventral striatum activity when participants watched explicit sexual stimuli compared to non-explicit sexual/erotic material. We now hypothesized that the ventral striatum should respond to preferred pornographic compared to non-preferred pornographic pictures and that the ventral striatum activity in this contrast should be correlated with subjective symptoms of Internet pornography addiction. We studied 19 heterosexual male participants with a picture paradigm including preferred and non-preferred pornographic materials. Subjects had to evaluate each picture with respect to arousal, unpleasantness, and closeness to ideal. Pictures from the preferred category were rated as more arousing, less unpleasant, and closer to ideal. Ventral striatum response was stronger for the preferred condition compared to non-preferred pictures. Ventral striatum activity in this contrast was correlated with the self-reported symptoms of Internet pornography addiction. The subjective symptom severity was also the only significant predictor in a regression analysis with ventral striatum response as dependent variable and subjective symptoms of Internet pornography addiction, general sexual excitability, hypersexual behavior, depression, interpersonal sensitivity, and sexual behavior in the last days as predictors. The results support the role for the ventral striatumin processing reward anticipation and gratification linked to subjectively preferred pornographic material. Mechanisms for reward anticipation in ventral striatum may contribute to a neural explanation of why individuals with certain preferences and sexual fantasies are at-risk for losing their control over Internet pornography consumption. (C) 2016 Elsevier Inc. All rights reserved.