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Taste responses in sheep medulla: changes during development

C M Mistretta, R M Bradley

    Science (New York, N.Y.)
    |November 3, 1978
    PubMed
    Summary
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    Taste neuron responses in sheep change as they develop. Younger fetuses show fewer responses to salts and acids, with specific responses emerging sequentially, suggesting maturation of taste receptors.

    Area of Science:

    • Neuroscience
    • Gustatory System Development
    • Mammalian Taste Perception

    Background:

    • The solitary tract and its nuclei are crucial for processing taste information.
    • Developmental changes in neural pathways can significantly alter sensory perception.
    • Understanding taste development is key to understanding feeding behaviors and nutritional intake.

    Purpose of the Study:

    • To investigate how taste neuron response characteristics change during sheep development.
    • To determine if developmental changes in taste responses follow a specific pattern.
    • To explore the relationship between these neural changes and the maturation of taste receptor sites.

    Main Methods:

    • Electrophysiological recordings were used to measure the response characteristics of taste neurons.

    Related Experiment Videos

  • Neurons were stimulated via the tongue using various salts and acids.
  • Comparisons were made between different developmental stages: younger fetuses, older fetuses, lambs, and adults.

    • Main Results:

    • Taste neurons in younger sheep fetuses exhibited significantly fewer responses to salt and acid stimulation compared to older fetuses, lambs, and adults.
    • The development of responses to specific salts and acids occurred in a predictable, non-random sequence.
    • These findings suggest a progressive maturation of the gustatory system during development.

    Conclusions:

    • Taste neuron response properties in the sheep solitary tract undergo significant developmental alterations.
    • The sequential emergence of responses to different taste stimuli indicates a structured maturation process.
    • These developmental changes in neural responses are likely linked to the maturation of peripheral taste receptor sites.