Departamento de Psicología Básica, Clínica y Psicobiologia, Universitat Jaume I, Castellón, Spain.
PLoS One. 2013 Jun 28;8(6):e66940. doi: 10.1371/journal.pone.0066940. Print 2013.
The behavioral approach system (BAS) from Gray's reinforcement sensitivity theory is a neurobehavioral system involved in the processing of rewarding stimuli that has been related to dopaminergic brain areas. Gray's theory hypothesizes that the functioning of reward brain areas is modulated by BAS-related traits. To test this hypothesis, we performed an fMRI study where participants viewed erotic and neutral pictures, and cues that predicted their appearance. Forty-five heterosexual men completed the Sensitivity to Reward scale (from the Sensitivity to Punishment and Sensitivity to Reward Questionnaire) to measure BAS-related traits. Results showed that Sensitivity to Reward scores correlated positively with brain activity during reactivity to erotic pictures in the left orbitofrontal cortex, left insula, and right ventral striatum. These results demonstrated a relationship between the BAS and reward sensitivity during the processing of erotic stimuli, filling the gap of previous reports that identified the dopaminergic system as a neural substrate for the BAS during the processing of other rewarding stimuli such as money and food.
格雷的强化敏感性理论中的行为趋近系统（BAS）是一个涉及处理奖励刺激的神经行为系统，与多巴胺能脑区有关。格雷的理论假设，奖励脑区的功能是由与 BAS 相关的特征调节的。为了验证这一假设，我们进行了一项 fMRI 研究，参与者观看了色情和中性图片，以及预测图片出现的线索。45 名异性恋男性完成了奖励敏感性量表（来自惩罚敏感性和奖励敏感性问卷），以衡量与 BAS 相关的特征。结果表明，奖励敏感性得分与左侧眶额皮质、左侧岛叶和右侧腹侧纹状体在对色情图片的反应过程中的大脑活动呈正相关。这些结果表明，在处理色情刺激时，BAS 与奖励敏感性之间存在关系，填补了之前的报告的空白，这些报告将多巴胺能系统确定为 BAS 在处理其他奖励刺激（如金钱和食物）时的神经基础。
