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A function for guttural pouches in the horse

Author

Listed:
  • Keith E. Baptiste

    (University of Saskatchewan
    Danish Veterinary Laboratory)

  • Jonathan M. Naylor

    (University of Saskatchewan)

  • Jeremy Bailey

    (Radiology and Surgery, University of Saskatchewan)

  • Ernest M. Barber

    (University of Saskatchewan)

  • Klass Post

    (University of Saskatchewan)

  • Jim Thornhill

    (University of Saskatchewan)

Abstract

Athletic animals must keep their brains cool during exertion because this organ can be damaged irreversibly by hyperthermia. But how horses do this has remained a mystery, as they don't appear to have thermoregulatory dervices like those found in other animals. They do, however, have a unique anatomical arrangement of their internal carotid arteries, which supply blood to the brain: these are enveloped by a pair of air-filled guttural pouches. Here we show that horses use their guttural pouches to cool these important arteries during exercise, keeping the brain from overheating.

Suggested Citation

  • Keith E. Baptiste & Jonathan M. Naylor & Jeremy Bailey & Ernest M. Barber & Klass Post & Jim Thornhill, 2000. "A function for guttural pouches in the horse," Nature, Nature, vol. 403(6768), pages 382-383, January.
    • Handle: RePEc:nat:nature:v:403:y:2000:i:6768:d:10.1038_35000284
    DOI: 10.1038/35000284
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