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The increased analgesic efficacy of cold therapy after an unsuccessful analgesic experience is associated with inferior parietal lobule activation

 Jae Chan Choi  ;  Hae-Jeong Park  ;  Jeong A Park  ;  Dae Ryong Kang  ;  Young-Seok Choi  ;  SoHyun Choi  ;  Hong Gyu Lee  ;  Jun-Ho Choi  ;  In-Ho Choi  ;  Min Woo Yoon  ;  Jong-Min Lee  ;  Jinhee Kim 
 SCIENTIFIC REPORTS, Vol.12(1) : 14687, 2022-08 
Journal Title
Issue Date
Analgesics* / therapeutic use ; Humans ; Hypothermia, Induced* ; Pain / drug therapy ; Pain Management ; Parietal Lobe / diagnostic imaging
Prior experiences of successful and failed treatments are known to influence the efficacy of a newly applied treatment. However, whether that carry-over effect applies to non-pharmacological treatments is unknown. This study investigated how a failed treatment history with placebo analgesic cream affected the therapeutic outcomes of cold-pack treatment. The neural correlates underlying those effects were also explored using functional magnetic resonance imaging. The effect of the placebo analgesic cream was induced using placebo conditioning with small (44.5 °C to 43.7 °C, negative experience) and large (44.5 °C to 40.0 °C, positive experience) thermal stimuli changes. After the placebo conditioning, brain responses and self-reported evaluations of the effect of subsequent treatment with a cold-pack were contrasted between the two groups. The negative experience group reported less pain and lower anxiety scores in the cold-pack condition than the positive experience group and exhibited significantly greater activation in the right inferior parietal lobule (IPL), which is known to be involved in pain relief. These findings suggest that an unsatisfying experience with an initial pain-relief treatment could increase the expectations for the complementary treatment outcome and improve the analgesic effect of the subsequent treatment. The IPL could be associated with this expectation-induced pain relief process.
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1. College of Medicine (의과대학) > Dept. of Nuclear Medicine (핵의학교실) > 1. Journal Papers
Yonsei Authors
Park, Hae Jeong(박해정) ORCID logo https://orcid.org/0000-0002-4633-0756
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