Emotion regulation and functional neurological symptoms: Does emotion processing convert into sensorimotor activity?
Emotion regulation and functional neurological symptoms: Does emotion processing convert into sensorimotor activity?
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DOI：
10.1016/j.jpsychores.2015.10.009
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发表时间：
2015-12-01
影响因子：
4.7
通讯作者：
Steffen, Astrid
中科院分区：
文献类型：
--
作者：
Fiess, Johanna;Rockstroh, Brigitte;Steffen, Astrid
目的：功能性神经症状（FNS）被假设解释为情绪加工向感觉运动缺陷的转变，但支持这一假设的心理生理学证据很少。本研究测量了情绪调节过程中的神经磁感和躯体感觉，以检验额皮质和感觉运动活动作为情绪加工改变的信号。方法：对20例FNS患者和20例健康对照者进行情绪调节任务时的脑磁图（MEG）活动。参与者被要求(A)被动地观看不愉快或中性的图片，或(B)利用认知重新评估策略来降低他们对不愉快图片的情绪反应。通过8-12赫兹（alpha）功率调制来评估组和任务特异性皮层活动，而通过经皮神经电刺激的感知和不适阈值来测量躯体感觉的调节。结果：实施情绪调节策略可诱导HC的额皮质α功率调节，但对患者没有作用，患者在感觉运动区表现出明显的活动调节。与HC相比，任务后患者经皮刺激的不适阈值降低，症状强度也增加。结论：减少了额皮质，但增强了感觉运动参与情绪调节的努力，为FNS中（厌恶）感觉转化为（厌恶）躯体感觉的建模提供了线索。(C) 2015年作者。Elsevier Inc.出版。这是一篇基于CC BY-NC-ND许可（http://creativecommons.org/licenses/by-nc-nd/4.0/）的开放获取文章。
Objective: Functional neurological symptoms (FNS) are hypothetically explained as a shift of emotion processing to sensorimotor deficits, but psychophysiological evidence supporting this hypothesis is scarce. The present study measured neuromagnetic and somatic sensation during emotion regulation to examine frontocortical and sensorimotor activity as signals of altered emotion processing.Methods: Magnetoencephalographic (MEG) activity was mapped during an emotion regulation task in 20 patients with FNS and 20 healthy comparison participants (HC). Participants were instructed to (A) passively watch unpleasant or neutral pictures or (B) down-regulate their emotional response to unpleasant pictures utilizing cognitive reappraisal strategies. Group- and task-specific cortical activity was evaluated via 8-12 Hz (alpha) power modulation, while modulation of somatic sensation was measured via perception and discomfort thresholds of transcutaneous electrical nerve stimulation.Results: Implementing emotion regulation strategies induced frontocortical alpha power modulation in HC but not in patients, who showed prominent activity modulation in sensorimotor regions. Compared to HC, discomfort threshold for transcutaneous stimulation decreased after the task in patients, who also expressed increased symptom intensity.Conclusions: Reduced frontocortical, but enhanced sensorimotor involvement in emotion regulation efforts offers a trace to modeling a conversion of (aversive) feelings into (aversive) somatic sensations in FNS. (C) 2015 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).