A follow-up fMRI study of a transferable placebo anxiolytic effect.

A follow-up fMRI study of a transferable placebo anxiolytic effect.
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可转移安慰剂抗焦虑作用的后续功能磁共振成像研究。

DOI:
10.1111/j.1469-8986.2011.01178.x
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发表时间:
2011-08
期刊:
影响因子:
3.7
通讯作者:
Jing Luo
Jing Luo
中科院分区:
心理学3区
文献类型:
--
作者:
Weicai Zhang;Shaozhen Qin;Jianyou Guo;Jing Luo

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我们之前的研究表明,安慰剂预期可以以一种可转移的方式发展;例如,在止痛体验中产生的安慰剂预期可能导致焦虑减少。考虑到杏仁核和脑岛等情绪反应区域的活动可以通过功能磁共振成像(fMRI)检测到,我们使用fMRI进一步研究可转移安慰剂的抗焦虑作用。一项主效应分析显示,在安慰剂的情况下,杏仁核和脑岛的活动减少了,而相互作用分析显示,在安慰剂的情况下,当看到不愉快的图片时,这两个区域的活动选择性地减弱了。我们还观察到,在安慰剂条件下,当观看情绪消极或中性的图片时,亚属前扣带皮层的活动更大。这些数据表明,缓解焦虑的安慰剂效应是由参与者的期望所支撑的奖励相关反应产生的。
Our previous study showed that placebo expectations can develop in a transferable manner; for example, a placebo expectation developed within an analgesic experience may lead to reduced anxiety. Considering that activities in such emotion-responsive areas as the amygdala and insula can be detected through functional magnetic resonance imaging (fMRI), we used fMRI to further study the transferable placebo anxiolytic effect. A main-effect analysis showed that activity in the amygdala and insula was reduced in the placebo condition, whereas an interaction analysis showed activity in the two regions was selectively attenuated in the placebo condition when unpleasant pictures were viewed. We also observed greater activity in the subgenual anterior cingulate cortex under placebo conditions when either emotionally negative or neutral pictures were viewed. These data suggest that the anxiety-relieving placebo effect arose from a reward-related response underpinned by the participants' expectations.
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