Powers Jocelyn M, Ioachim Gabriela, Stroman Patrick W
Stroman Lab, Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada.
Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada.
Front Neurosci. 2022 May 26;16:884093. doi: 10.3389/fnins.2022.884093. eCollection 2022.
Our psychological state greatly influences our perception of sensations and pain, both external and visceral, and is expected to contribute to individual pain sensitivity as well as chronic pain conditions. This investigation sought to examine the integration of cognitive and emotional communication across brainstem regions involved in pain modulation by comparing data from previous functional MRI studies of affective modulation of pain. Data were included from previous studies of music analgesia (Music), mood modulation of pain (Mood), and individual differences in pain (ID), totaling 43 healthy women and 8 healthy men. The Music and Mood studies were combined into an affective modulation group consisting of runs with music and positive-valenced emotional images plus concurrent presentation of pain, and a control group of runs with no-music, and neutral-valenced images with concurrent presentation of pain. The ID group was used as an independent control. Ratings of pain intensity were collected for each run and were analyzed in relation to the functional data. Differences in functional connectivity were identified across conditions in relation to emotional, autonomic, and pain processing in periods before, during and after periods of noxious stimulation. These differences may help to explain healthy pain processes and the cognitive and emotional appraisal of predictable noxious stimuli, in support of the Fields' Decision Hypothesis. This study provides a baseline for current and future investigation of expanded neural networks, particularly within higher limbic and cortical structures. The results obtained by combining data across studies with different methods of pain modulation provide further evidence of the neural signaling underlying the complex nature of pain.
我们的心理状态极大地影响着我们对外部和内脏感觉及疼痛的感知,并且有望对个体的疼痛敏感性以及慢性疼痛状况产生影响。本研究旨在通过比较先前关于疼痛情感调节的功能磁共振成像研究数据,来检验参与疼痛调制的脑干区域间认知与情感交流的整合情况。数据来自先前关于音乐镇痛(音乐组)、疼痛的情绪调节(情绪组)以及疼痛个体差异(个体差异组)的研究,共计43名健康女性和8名健康男性。音乐组和情绪组的研究合并为一个情感调节组,该组包括伴有音乐和正性情绪图像且同时呈现疼痛的实验环节,以及一个无音乐、伴有中性情绪图像且同时呈现疼痛的对照组实验环节。个体差异组用作独立对照组。针对每个实验环节收集疼痛强度评分,并将其与功能数据相关联进行分析。在有害刺激之前、期间和之后的时间段内,确定了不同条件下与情绪、自主神经和疼痛处理相关的功能连接差异。这些差异可能有助于解释健康的疼痛过程以及对可预测有害刺激的认知和情感评估,以支持菲尔德的决策假说。本研究为当前及未来对扩展神经网络的研究提供了基线,尤其是在更高层次的边缘系统和皮质结构内。通过将不同疼痛调制方法的研究数据相结合所获得的结果,进一步证明了疼痛复杂本质背后的神经信号传导。