Trial reportThe journal of physiological sciences : JPS2021
Effects of chiropractic spinal manipulation on laser-evoked pain and brain activity.
Trial report in The journal of physiological sciences : JPS, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05986370 (The METRIC Study Protocol), which is not on this map. Cited by 3 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
The METRIC Study Protocol: an Explanatory Randomized Controlled Trial Investigating the Neurophysiological Mechanisms Underlying the Therapeutic Effects of Spinal Manipulative Therapy for Chronic Primary Low Back Pain
Who cites it
3 citing papers in PubMed, 6 citations in OpenAlex.
- Neurophysiological Response of Spinal Mobilization and Manipulation in Individuals With and Without Musculoskeletal Spine Disorders: A Scoping Review.The European journal of neuroscience · 2026Article
- Effect of Chiropractic Care on Auditory Attention in Healthy Individuals: An Analysis of the P300 Event-Related Potentials Component.The Malaysian journal of medical sciences : MJMS · 2026Article
- Segmental Chiropractic Spinal Manipulation Does not Reduce Pain Amplification and the Associated Pain-Related Brain Activity in a Capsaicin-Heat Pain Model.Frontiers in pain research (Lausanne, Switzerland) · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
Abstract
The aim of this study was to examine the mechanisms underlying hypoalgesia induced by spinal manipulation (SM). Eighty-two healthy volunteers were assigned to one of the four intervention groups: no intervention, SM at T4 (homosegmental to pain), SM at T8 (heterosegmental to pain) or light mechanical stimulus at T4 (placebo). Eighty laser stimuli were applied on back skin at T4 to evoke pain and brain activity related to Aδ- and C-fibers activation. The intervention was performed after 40 stimuli. Laser pain was decreased by SM at T4 (p = 0.028) but not T8 (p = 0.13), compared with placebo. However, brain activity related to Aδ-fibers activation was not significantly modulated (all p > 0.05), while C-fiber activity could not be measured reliably. This indicates that SM produces segmental hypoalgesia through inhibition of nociceptive processes that are independent of Aδ fibers. It remains to be clarified whether the effect is mediated by the inhibition of C-fiber activity.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.