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Nociception

Nociception

Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as piercing pain from a sharp object, heat from an open flame, or contact with corrosive chemicals are first detected by sensory receptors, called nociceptors, located on nerve endings. Nociceptors express ion channels that convert noxious stimuli into electrical signals. When these signals reach the brain via sensory neurons, they are perceived as pain. Thus, pain helps the...

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Related Experiment Video

Updated: Jun 6, 2026

Dynamic Quantitative Sensory Testing to Characterize Central Pain Processing

Dynamic Quantitative Sensory Testing to Characterize Central Pain Processing

Published on: February 16, 2017

Quantitative pinch stimulator for exploring evoked nociceptive responses: a pilot study.

Chih-Ping Chen¹, Wen-Li Liao, Yi-Li Tseng

¹Institute of Biomedical Engineering, College of Engineering and College of Medicine, National Taiwan University, Taipei, Taiwan.

Biomedical Engineering Online

|November 25, 2010

Summary

Researchers developed a novel pinch stimulator for pain research. This device provides quantitative, reproducible noxious stimuli and a trigger signal for studying pain processing and evoked potentials.

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Area of Science:

Neuroscience
Pain Research
Biomedical Engineering

Background:

Mechanical noxious stimulators are crucial for both clinical and basic pain research.
Existing methods may lack quantitative and reproducible noxious stimuli.
Synchronous external trigger signals are essential for acquiring evoked potentials.

Purpose of the Study:

To develop a novel mechanical noxious stimulator for pain research.
To create a device capable of generating quantitative, reproducible noxious pinch stimuli.
To incorporate a synchronous external trigger signal for evoked potential acquisition.

Main Methods:

A pinch stimulator was designed with integrated audible and visual aids for ethical force regulation.
The device's circuit was constructed using minimally selected components for efficient evoked potential generation.
Reproducibility of nociceptive responses was validated through device testing.

Main Results:

The device generates a force output linearly proportional to the produced voltage.
Increased pinch force directly correlates with a higher number of induced action potentials.
The device successfully provides a reproducible noxious pinch stimulus.

Conclusions:

The developed pinch stimulator offers a valuable tool for pain research.
It facilitates the study of nociceptive signal processing mechanisms in the brain.
The device's reproducibility and quantitative output enhance the study of pain pathways.