Brain, sleep and memory · 1 min read
Pain was lower with placebo, but one brain signal did not follow
Nearly 400 people reported less pain from heat and pressure. One brain measure fell, while another, more closely tied to pain signals, did not.
The study, in plain language
An expectation of relief can change the experience of pain. To see what accompanied that change, the team created expectations with a cream containing no active ingredient and compared responses to heat and pressure stimuli.
With the placebo, people rated both types of stimulus as less painful. A brain measure linked to aspects of pain experience also fell. Another, more closely linked to processing pain signals, showed no visible reduction. Looking at both measures helped separate changes that a report of relief alone could not distinguish.
The key idea
With the placebo, people reported less pain, but only one of the two brain measures visibly decreased.
Something to think about
Think of a time you expected something to relieve you: did only what you felt change, or also something a device might measure? Here people reported less pain, and only one of the two brain measures showed a visible decrease.
The original study
Placebo treatment affects brain systems related to affective and cognitive processes, but not nociceptive pain
Source under CC BY 4.0. English adaptation and explanation by PaperFlow, with AI assistance. The text has been reorganized for a general audience; it is not the complete paper and does not imply endorsement by its authors.
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