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Related Experiment Videos

Trigeminal reflexes and ingestive behavior in the rat.

H P Zeigler, K Semba, M F Jacquin

    Behavioral Neuroscience
    |December 1, 1984
    PubMed
    Summary

    Trigeminal reflexes control rat feeding. Perioral contact triggers jaw opening reflexes, essential for ingestive behaviors like eating and drinking.

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    Area of Science:

    • Neuroscience
    • Animal Behavior

    Background:

    • Ingestive behaviors are crucial for survival.
    • The trigeminal nerve plays a role in orofacial sensory processing.

    Purpose of the Study:

    • To investigate the role of trigeminally mediated jaw-opening reflexes in rat ingestive behavior.
    • To understand how sensory input from the mouth influences feeding and drinking.

    Main Methods:

    • Photographic, electrophysiological, and neurobehavioral analyses were employed.
    • Jaw-opening reflexes were studied in response to perioral stimulation.
    • Trigeminal orosensory deafferentation was performed, sparing other sensory modalities.

    Main Results:

    • Jaw opening during eating/drinking was preceded by perioral contact.
    • Electrical and mechanical stimulation elicited short-latency jaw-opening reflexes.
    • Trigeminal deafferentation significantly reduced or abolished mouth opening during ingestive tasks.

    Conclusions:

    • Trigeminally mediated reflexes are critical for initiating jaw opening during feeding and drinking.
    • Sensory input to the trigeminal system is essential for motivated ingestive behaviors in rats.

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