Hot Thermal Thresholds
Hot Thermal Thresholds - Related Videos
05:45
Rapid Determination of the Thermal Nociceptive Threshold in Diabetic Rats
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Cited by 10 •
2012
Here, we describe a rapid reliable and simple procedure to determine the lowest temperature at which rats or mice show nocifensive behavior, i.e. the thermal nociceptive threshold (TNT). This method applies a slowly increasing thermal stimulus allowing precise and reproducible estimation of TNTs with minimum, if any, stress to the animals.
07:12
Assessment of Sensory Thresholds in Dogs Using Mechanical and Hot Thermal Quantitative Sensory Testing
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Cited by 5 •
2021
This work describes a standard protocol for mechanical and hot thermal quantitative sensory testing to evaluate the somatosensory system in dogs. Sensory thresholds are measured using an electronic von Frey anesthesiometer, pressure algometer, and hot contact thermode.
10:13
Working with Hot and Cold Sources
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2023
Source: Robert M. Rioux & Suprita Jharimune, Pennsylvania State University, University Park, PA Working with extreme temperatures, both high and low, is an integral part of many laboratory operations. For many, mentioning a laboratory instantly evokes the mental picture of a Bunsen burner. Bunsen burners and hot plates are used extensively in small and large operations in research laboratories and industries, thus making it necessary for all users to be aware of their safe handling...
09:17
Hot Wire Anemometry
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2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI Hot-wire anemometers have a very short time-response, which makes them ideal to measure rapidly fluctuating phenomena such as turbulent flows. The purpose of this experiment is to demonstrate the use of hot-wire anemometry.
13:21
Determining heat and mechanical pain threshold in inflamed skin of human subjects
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Cited by 21 •
2009
Algorithms assessing heat and mechanical pain thresholds in experimentally inflamed skin of human study subjects are shown. The two pain testing paradigms independently examine nociceptive processing by the two major peripheral nerve fiber populations transmitting pain, i.e., non-myelinated C fibers and small myelinated A-delta fibers.
FAQs
TRPV1-expressing peripheral sensory neurons help encode responses to intense warmth and thermal stimuli that become painful. Their activity provides a biological link between skin temperature and signals transmitted through thermosensory and nociceptive pathways. Measuring the reported threshold therefore offers an indirect way to examine how these peripheral components contribute to normal or altered heat and pain sensitivity.
The rate at which a thermal stimulator heats the skin can change the reported temperature at which warmth or pain is detected. Skin location also influences measurements, while individual sensitivity introduces additional variation between participants. These factors can shift threshold values without necessarily indicating a change in disease or treatment response, so comparisons require consistent testing conditions.
Recording when a stimulus first becomes distinctly hot and when it becomes painful can separate aspects of thermosensory processing from nociceptive processing. The two reports may therefore provide complementary information rather than a single measure of sensitivity. In neuroscience studies, this distinction helps characterize whether a sensory change primarily affects heat detection, pain transition, or both.
A thermal stimulator is applied to a selected skin site, and the device gradually increases the temperature. The participant reports when the stimulus becomes hot and, when assessed, when it becomes painful. Investigators record those temperatures as threshold measures. Repeating the same sequence under controlled conditions supports comparisons across participants, body sites, or experimental groups.
Researchers should keep the heating rate, skin location, and response instructions consistent across measurements. They also need to account for individual sensitivity when comparing participants. These controls reduce variation caused by the testing procedure rather than the sensory system. Standardization is especially important when thresholds are used to evaluate neurological changes or compare responses before and after treatment.
Threshold measurements help researchers assess pain pathways, characterize sensory changes associated with neurological disorders, and evaluate analgesic treatments. Changes in the recorded temperatures can indicate altered thermosensory or nociceptive function when the testing procedure remains consistent. The method is therefore useful for linking participant reports to peripheral heat-sensitive neurons and broader changes in sensory processing.