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[Do specialized cutaneous cold receptors exist?].

A V Zeveke, V L Shaposhnikov

    Biulleten' Eksperimental'Noi Biologii I Meditsiny
    |September 1, 1979
    PubMed
    Summary
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    The study found that pilomotor contractions excite mechanoreceptors in cat skin, even during cooling. This suggests cats lack specific cold receptors, challenging previous understandings of feline thermoreception.

    Area of Science:

    • Neuroscience
    • Sensory Physiology
    • Cutaneous Mechanoreception

    Context:

    • Investigating the role of pilomotor contractions in activating cutaneous nerve fibers.
    • Examining the effects of skin cooling on mechanoreceptor response.
    • Utilizing the integrating method of colliding impulses for quantitative analysis.

    Purpose:

    • To determine if pilomotor activity influences mechanoreceptor-mediated nerve impulses during skin cooling.
    • To ascertain the presence of specific cold receptors in feline skin.

    Summary:

    • Unmyelinated nerve fibers in cat skin were analyzed for impulse conduction from mechanoreceptors during pilomotor contractions, with and without a 10°C skin cooling stimulus.
    • Results indicate that the same mechanoreceptors are activated by pilomotor contractions under both normal and cooled skin conditions.

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  • This finding leads to the conclusion that specific cold receptors are absent in cat skin.

    • Impact:

    • Challenges the existing model of feline thermoreception by suggesting a lack of dedicated cold receptors.
    • Highlights the role of mechanoreceptors in sensing temperature changes via pilomotor activity.
    • Provides a foundation for further research into alternative mechanisms of cold sensation in mammals.