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Related Experiment Video

Updated: Jul 22, 2026

A Protocol of Manual Tests to Measure Sensation and Pain in Humans

A Protocol of Manual Tests to Measure Sensation and Pain in Humans

Published on: December 19, 2016

Thermal perception thresholds recorded using method of limits change over brief time intervals.

Shea T Palmer¹, Denis J Martin

¹Faculty of Health & Social Care, University of the West of England, Bristol, UK. Shea.Palmer@uwe.ac.uk

Somatosensory & Motor Research

|March 1, 2006

Summary

Thermal perception thresholds measured using Quantitative Sensory Testing (QST) naturally vary over one hour. Repeated testing significantly altered warm sensation, cold sensation, and hot pain thresholds in healthy women.

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Area of Science:

Neuroscience
Sensory Physiology

Background:

Quantitative Sensory Testing (QST) evaluates small afferent nerve function.
QST is frequently used to assess intervention effects on nerve fiber activity over short durations.
The inherent variability of perception thresholds within short timeframes is not well-established, hindering the accurate detection of induced changes.

Purpose of the Study:

To determine the natural variation in thermal perception thresholds within a one-hour period.
To investigate changes in cold sensation (CS), warm sensation (WS), cold pain (CP), and hot pain (HP) thresholds during repeated testing.

Main Methods:

Twenty-four healthy women (18-28 years) participated.
Thermal perception thresholds (CS, WS, CP, HP) were measured on the thenar eminence using a standardized method of limits algorithm.
Measurements were repeated across six 8-minute cycles within a one-hour timeframe.

Main Results:

Statistically significant changes over time were observed for WS, CS, and HP thresholds (p < 0.05).
No significant changes were found for CP thresholds (p = 0.232).
These findings indicate natural fluctuations in thermal perception with repeated testing.

Conclusions:

Thermal perception thresholds for WS, CS, and HP are subject to significant change with repeated testing within a one-hour interval.
These variations must be considered when interpreting changes in thermal perception thresholds in research.
Excluding control groups in such research trials represents a fundamental methodological flaw.