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Updated: May 9, 2026
Dynamic Quantitative Sensory Testing to Characterize Central Pain Processing
Published on: February 16, 2017
Effect of conditioned pain modulation on trigeminal somatosensory function evaluated by quantitative sensory testing
Yuka Oono1, Lene Baad-Hansen, Kelun Wang
1Center for Sensory-Motor Interaction (SMI), Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark Section of Anesthesiology and Clinical Physiology, Department of Oral Restitution, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan Section of Clinical Oral Physiology, Department of Dentistry, Aarhus University, Aarhus, Denmark Department of Oral & Maxillofacial Surgery, Aalborg Hospital, Aalborg, Denmark Center of Functionally Integrative Neuroscience (CFIN), MindLab, Aarhus University Hospital, Aarhus, Denmark.
Craniofacial pain modulation significantly impacts pressure pain thresholds (PPT) in healthy individuals, demonstrating endogenous pain inhibition. This effect was most reliably detected using PPT measurements in quantitative sensory testing (QST).
Area of Science:
- Neuroscience
- Pain Research
- Human Physiology
Background:
- Conditioned pain modulation (CPM) is a top-down endogenous pain inhibitory mechanism.
- Investigating CPM's effect on somatosensory function, particularly in the trigeminal system, is crucial for understanding pain processing.
- Quantitative sensory testing (QST) provides objective measures of somatosensory function.
Purpose of the Study:
- To systematically investigate the effect of craniofacially evoked CPM on trigeminal somatosensory function.
- To assess the sensitivity of various QST parameters in detecting CPM-induced hypoalgesia.
- To explore potential sex differences in CPM response.
Main Methods:
- Healthy participants underwent a quantitative sensory testing (QST) protocol on the cheek.
- Conditioning stimulus (CS) involved craniofacial pressure pain (VAS 5) or no pain (VAS 0, control).
- A full QST battery assessed 13 somatosensory parameters; data analyzed using ANOVA.
Main Results:
- A significant session-time interaction revealed hypoalgesia during the painful CS session, indicated by increased pressure pain thresholds (PPT).
- PPT was the only QST parameter significantly modulated by the craniofacial CS.
- No significant sex differences were detected, though larger sample sizes may be needed.
Conclusions:
- Craniofacially evoked CPM effectively modulates trigeminal somatosensory function, specifically PPT, in healthy humans.
- PPT is the most sensitive QST measure for detecting endogenous pain inhibitory mechanisms.
- Further research with larger cohorts is warranted to explore potential sex differences in CPM.
