Abstract：
Although researchers have documented behavioral and brain structure correlates of pain resilience, associated physiological responses have received little consideration. In this study, we assessed psychophysiological differences between high (HPR), moderate (MPR), and low (LPR) pain resilience subgroups during anticipation, experiencing, and recovery from laboratory pain. In an initial pain anticipation task, participants (79 women, 32 man) viewed visual cues to signal possible mild or intense shocks prior to receiving these shocks. Subsequently, in a pain recovery task, participants received uncued mild and intense shocks. Subjective appraisals were assessed during each task in tandem with continuous recording of skin conductance level (SCL), heart rate variability (HRV), and corrugator electromyography (cEMG). On physiological indexes, HPR subgroup members displayed significantly lower SCL than MPR and LPR subgroups did during anticipation and experiencing of pain while no resilience group effects were found for HRV or cEMG. During pain recovery, HPR and LPR subgroups displayed weaker SCL than the MPR subgroup did in the immediate aftermath of shock. However, HPR members continued to display lower SCL than other groups did over an extended recovery period. On self-report measures, the LPR subgroup reported higher levels of anticipatory anxiety and expected pain than HPR and MPR subgroups did during the pain anticipation task. Together, results suggested higher pain resilience is characterized, in part, by comparatively reduced SCL during the course of anticipating, experiencing and recovering from painful shock.
摘要：
尽管研究人员已经记录了行为和大脑结构与疼痛弹性的相关性，相关的生理反应很少被考虑。在这项研究中,我们评估了高（HPR）之间的心理生理差异，中等（MPR），和预期期间的低(LPR)疼痛弹性亚组，体验,从实验室疼痛中恢复。在最初的疼痛预测任务中，参与者(79名女性，32人）在接受这些电击之前，查看了视觉线索以表示可能的轻度或剧烈电击。随后，在疼痛恢复任务中，参与者接受了未提示的轻度和强烈电击.在每个任务期间进行主观评估，同时连续记录皮肤电导水平（SCL），心率变异性（HRV），和波纹肌电图（cEMG）。在生理指标上，在预期和经历疼痛期间，HPR亚组成员的SCL明显低于MPR和LPR亚组，而HRV或cEMG未发现韧性组影响。在疼痛恢复期间，HPR和LPR亚组在休克后立即表现出比MPR亚组更弱的SCL。然而,在延长的恢复期内，HPR成员的SCL继续低于其他组。关于自我报告措施，在疼痛预测任务期间,LPR亚组报告的预期焦虑和预期疼痛水平高于HPR和MPR亚组.一起,结果表明，具有较高的疼痛弹性，在某种程度上,通过在预期过程中相对降低SCL，经历并从痛苦的休克中恢复过来。
