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Trigeminal sensorimotor mechanisms and ingestive behavior.

H P Zeigler, M F Jacquin, M G Miller

    Neuroscience and Biobehavioral Reviews
    |January 1, 1984
    PubMed
    Summary
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    Selective sectioning of trigeminal orosensory nerves in rats revealed its crucial role in controlling food and water intake. This procedure significantly impacted feeding behaviors and body weight regulation.

    Area of Science:

    • Neuroscience
    • Physiology
    • Behavioral Science

    Background:

    • The trigeminal orosensory system plays a role in sensory processing within the oral cavity.
    • Understanding its contribution to ingestive behaviors is essential for comprehending feeding regulation.

    Purpose of the Study:

    • To investigate the role of trigeminal orosensation in the control of food and water intake.
    • To assess the impact of trigeminal orosensory deafferentation on feeding behaviors and body weight regulation in rats.

    Main Methods:

    • Selective sectioning of trigeminal orosensory nerves in rats.
    • Analysis of feeding and drinking patterns.
    • Assessment of learned instrumental behaviors and dietary self-selection.

    Main Results:

    Related Experiment Videos

    • Trigeminal orosensory deafferentation reduced responsiveness to food and water.
    • Disruption of jaw-opening and tongue protrusion reflexes essential for eating and drinking.
    • Impaired dietary self-selection and reduced long-term body weight regulation.
    • Reduced initiation of feeding/drinking bouts and disrupted operant responses.

    Conclusions:

    • The trigeminal system is vital for both sensorimotor and motivational control of ingestive behavior.
    • Trigeminal motivational contributions to feeding differ from those of the gustatory system.
    • Diet palatability influences recovery from deafferentation deficits.