来源:心理所 | 2022-11-08 16:44:48 |
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社会奖赏加工能力的异常存在于精神分裂症患者和社会快感缺失个体,导致个体社会互动以及社会功能的障碍。因此,对于临床和亚临床群体的社会奖赏期待加工研究,将为针对社会互动过程的研究提供重要基础。然而,此前针对精神分裂症谱系的社会奖赏期待研究多局限于行为学研究。目前,尚不明确精神分裂症患者和社会快感缺失个体在社会奖赏期待加工中是否存在异常的神经加工活动。
近日,中国科学院心理研究所心理健康重点实验室神经心理学与应用认知神经科学实验室陈楚侨研究组开展关于上述人群社会奖赏期待相关神经机制的针对性研究。该研究招募23名精神分裂症患者和17名健康对照组,以及37名社会快感缺失个体和50名对应的健康对照组被试,进行社会延迟奖赏任务态磁共振扫描。
结果发现,精神分裂症患者存在左额内侧回激活降低,并表现出左额内侧回与左侧顶叶区域的负性功能连接。而社会快感缺失个体在社会奖赏期待加工过程中,则表现出左侧额中回激活的异常增强。另外,精神分裂症患者表现出社会脑网络中小脑-颞叶功能连接的增强,而社会快感缺失个体则出现社会脑网络中左侧额叶区域功能连接的增强。
研究表明,精神分裂症患者和亚临床社会快感缺失个体均在社会奖赏期待加工过程中存在一定的异常神经加工活动,同时,这些神经活动与现实社会网络特征的关联强度上存在减弱现象。该成果将推进对于精神分裂症谱系社会动机相关神经机制的研究进展。
相关研究成果在线发表在European Archive of Psychiatry and Clinical Neuroscience上。研究工作得到江苏省科技计划重点项目、Philip K.H. Wong基金、国家自然科学基金的支持。
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