Tim Brunson DCH

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Experimental Pain Ratings and Reactivity of Cortisol and Soluble Tumor Necrosis ...



Full Title: Experimental Pain Ratings and Reactivity of Cortisol and Soluble Tumor Necrosis Factor-? Receptor II Following a Trial of Hypnosis: Results of a Randomized Controlled Pilot Study.

Objective.? Current evidence supports the efficacy of hypnosis for reducing the pain associated with experimental stimulation and various acute and chronic conditions; however, the mechanisms explaining how hypnosis exerts its effects remain less clear. The hypothalamic-pituitary-adrenal (HPA) axis and pro-inflammatory cytokines represent potential targets for investigation given their purported roles in the perpetuation of painful conditions; yet, no clinical trials have thus far examined the influence of hypnosis on these mechanisms. Design. Healthy participants, highly susceptible to the effects of hypnosis, were randomized to either a hypnosis intervention or a no-intervention control.Using a cold pressor task, assessments of pain intensity and pain unpleasantness were collected prior to the intervention (Pre) and following the intervention (Post) along with pain-provoked changes in salivary cortisol and the soluble tumor necrosis factor-? receptor II (sTNF?RII). Results.? Compared with the no-intervention control, data analyses revealed that hypnosis significantly reduced pain intensity and pain unpleasantness. Hypnosis was not significantly associated with suppression of cortisol or sTNF?RII reactivity to acute pain from Pre to Post; however, the effect sizes for these associations were medium-sized. Conclusions.? Overall, the findings from this randomized controlled pilot study support the importance of a future large-scale study on the effects of hypnosis for modulating pain-related changes of the HPA axis and pro-inflammatory cytokines.

Pain Med. 2012 Jan;13(1):29-44. doi: 10.1111/j.1526-4637.2011.01293.x. Goodin BR, Quinn NB, Kronfli T, King CD, Page GG, Haythornthwaite JA, Edwards RR, Stapleton LM, McGuire L.

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