The feasibility of reproducing the previously observed spatial summation of pain effect during the COVID-19 pandemic biorxivpreprint UniLuebeck JagiellonskiUni COVID19 coronavirus covid pandemic pain
By Neha MathurOct 6 2022Reviewed by Danielle Ellis, B.Sc. In a recent study posted to the bioRxiv* server, researchers demonstrated the feasibility of reproducing the previously observed spatial summation of pain effect during the coronavirus disease 2019 pandemic. Additionally, they measured the association between pain-related expectancy and SSp.
The order of the two experimental conditions was pseudorandom, and the time interval between the two was one hour. During this interval, participants filled out the subjective experience of workload score questionnaire that measured their physical activity. First, the researchers tested the cold pain threshold on the examined limb. They placed an ice cube on the palmar surface of the participant's hands and recorded the time till they first experienced pain.
Study findings Related StoriesThe authors observed a significant SSp effect in home settings. More importantly, they found that stimulating a larger area, on average, resulted in higher pain. Moreover, they observed an interaction between the sequence of immersions and the size of the stimulated area. These interactions indicated that when the stimulated hand segments were of similar size, the pain was perceived differently in the ascending vs. descending condition, i.e.
Conclusions The present study introduced a novel methodology to study SSp effect in a home setup using a previously reported ascending/descending paradigm and cold stimulation. This method remarkably reproduced the SSp effect outside clinical and non-laboratory environments, previously shown by Marchand & Arsenault, yet using a modified methodology.
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