Laser-induced withdrawal test for electrophysiological recordings of nociception

CO2 lasers are often used in pain research. However, the stimulation parameters of the CO2 lasers, such as beam diameter, laser power, etc., used for these animal nociceptive studies vary across laboratories. The differences of the parameters usually make novices who want to reproduce the laser-evok...

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Veröffentlicht in:Journal of Comparative Physiology 2012, Vol.198 (1), p.79-83
Hauptverfasser: Kao, Yu-Chieh, Jaw, Fu-Shan
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Jaw, Fu-Shan
description CO2 lasers are often used in pain research. However, the stimulation parameters of the CO2 lasers, such as beam diameter, laser power, etc., used for these animal nociceptive studies vary across laboratories. The differences of the parameters usually make novices who want to reproduce the laser-evoked responses confused to follow. In this study, we quantitatively measured the laser-withdrawal reflex of the rat to ascertain the individual laser-withdrawal threshold and then found the thresholds were diverse among the rats we adopted. Furthermore, the optimal stimulation distance, the most conveniently modified stimulation parameter of CO2 laser stimuli, was also determined. We suggest that laser-withdrawal tests should be applied before the electrophysiological recordings in order to verify the efficiency of the induced nociception and substantiate the operational parameters of the CO2 laser device.
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subjects Animal Physiology
Animals
Biomedical and Life Sciences
carbon dioxide
Electrophysiological Phenomena - physiology
lasers
Lasers - adverse effects
Life Sciences
Male
Neurosciences
nociception
Nociception - physiology
Nociceptive Pain - diagnosis
Nociceptive Pain - physiopathology
pain
Pain Measurement - methods
Pain Measurement - standards
Rats
Rats, Wistar
Short Communication
Zoology
title Laser-induced withdrawal test for electrophysiological recordings of nociception
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