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Related Experiment Videos

A bladder-to-bladder cooling reflex in the cat.

M Fall1, S Lindström, L Mazières

  • 1Department of Physiology, University of Göteborg, Sweden.

The Journal of Physiology
|August 1, 1990
PubMed
Summary
This summary is machine-generated.

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This study reveals a new bladder cooling reflex in cats, triggered by cold stimulation of the urinary tract. This reflex involves specific nerve pathways and may help regulate body temperature during cold stress.

Area of Science:

  • Urology
  • Neuroscience
  • Physiology

Background:

  • The lower urinary tract's response to cold stimulation is not fully understood.
  • Existing knowledge of the micturition reflex does not account for cold-induced reflexes.

Purpose of the Study:

  • To investigate the reflex effects of cold stimulation on the lower urinary tract in cats.
  • To identify the neural pathways and receptors involved in this cooling reflex.

Main Methods:

  • Cats anesthetized with alpha-chloralose.
  • Bladder and urethra catheterized for fluid instillation and temperature monitoring.
  • Bladder pressure and efferent nerve activity in pelvic nerve filaments recorded.

Main Results:

Related Experiment Videos

  • A bladder cooling reflex was evoked by cold stimulation of both the bladder and urethra.
  • This reflex involved efferent discharge in pelvic motor fibers to the bladder, independent of mechanoreceptors.
  • The reflex originated from cold receptors, likely C-fibers, in the bladder and urethral walls.

    • Conclusions:

    • A distinct bladder cooling reflex exists, separate from the micturition reflex.
    • The reflex is mediated by specific afferent (C-fibers) and efferent (pelvic nerves) pathways.
    • This reflex may play a role in thermoregulation during cold stress.