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Pain chronification impacts whole-brain functional connectivity in women with hip osteoarthritis during pain stimulation

补品(生理学) 骨关节炎 医学 冷压试验 伤害 脑电图 慢性疼痛 功能连接 神经影像学 神经科学 物理医学与康复 麻醉 心理学 物理疗法 内科学 病理 血压 受体 替代医学 心率
作者
Joachim Erlenwein,Joachim Erlenwein,Mikkel Gram,Deborah Falla,Asbjørn Mohr Drewes,Michael Przemeck,Frank Petzke
出处
期刊:Pain Medicine [Oxford University Press]
卷期号:24 (9): 1073-1085 被引量:1
标识
DOI:10.1093/pm/pnad057
摘要

Abstract Objective Previous neuroimaging studies have shown that patients with chronic pain display altered functional connectivity across distributed brain areas involved in the processing of nociceptive stimuli. The aim of the present study was to investigate how pain chronification modulates whole-brain functional connectivity during evoked clinical and tonic pain. Methods Patients with osteoarthritis of the hip (n = 87) were classified into 3 stages of pain chronification (Grades I–III, Mainz Pain Staging System). Electroencephalograms were recorded during 3 conditions: baseline, evoked clinical hip pain, and tonic cold pain (cold pressor test). The effects of both factors (recording condition and pain chronification stage) on the phase-lag index, as a measure of neuronal connectivity, were examined for different frequency bands. Results In women, we found increasing functional connectivity in the low-frequency range (delta, 0.5–4 Hz) across pain chronification stages during evoked clinical hip pain and tonic cold pain stimulation. In men, elevated functional connectivity in the delta frequency range was observed in only the tonic cold pain condition. Conclusions Across pain chronification stages, we found that widespread cortical networks increase their synchronization of delta oscillations in response to clinical and experimental nociceptive stimuli. In view of previous studies relating delta oscillations to salience detection and other basic motivational processes, our results hint at these mechanisms playing an important role in pain chronification, mainly in women.
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