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Related Concept Videos

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
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Related Experiment Video

Updated: Dec 12, 2025

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice
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A mathematical model analyzing temperature threshold dependence in cold sensitive neurons.

Kees McGahan1, James Keener1

  • 1Department of Mathematics, University of Utah, Salt Lake City, Utah, United States of America.

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|August 14, 2020
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Summary
This summary is machine-generated.

This study models cold sensing neurons, revealing how TRPM8 and potassium channels control temperature thresholds. The findings explain how these neurons activate and deactivate, offering a framework for studying other neuron types.

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Area of Science:

  • Neuroscience
  • Computational Biology
  • Biophysics

Background:

  • Cold thermosensors are a recently explored somatosensory neuronal subclass.
  • Understanding the ionic mechanisms of cold sensing is crucial for neuroscience.

Purpose of the Study:

  • To create a mathematical model of a cold sensing neuron.
  • To elucidate the roles of specific ionic channels, particularly TRPM8 and voltage-gated potassium channels, in temperature-dependent neuronal activation and inactivation.

Main Methods:

  • Development of a mathematical model for a cold sensing neuron.
  • Utilizing bifurcation analysis to study the model's behavior.
  • Incorporating TRPM8 and voltage-gated potassium channels into a Hodgkin-Huxley type model.

Main Results:

  • The model successfully replicates experimental observations of cold thermosensor activation thresholds.
  • Analysis provides insights into the role of TRPM8 and potassium channels in setting these thresholds.
  • The study sheds light on the mechanisms underlying neuronal "shut-off" at specific temperatures, including potential roles for sodium and leak currents.

Conclusions:

  • A Hodgkin-Huxley type model augmented with TRPM8 channels can accurately simulate cold thermosensor behavior.
  • The model offers a framework for investigating less understood neuronal classes and their associated ionic channels.
  • This approach advances our understanding of thermosensation and neuronal excitability.