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Related Experiment Videos

Axonal transport maintains taste responses.

B Oakley, J S Chu, L B Jones

    Brain Research
    |September 28, 1981
    PubMed
    Summary

    Axonal transport in the glossopharyngeal nerve (IXth nerve) is crucial for maintaining taste function. Disrupting this transport significantly reduces taste responses, indicating its necessity for taste bud signaling.

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    Area of Science:

    • Neuroscience
    • Gustatory System Physiology
    • Cell Biology

    Background:

    • The glossopharyngeal nerve (IXth nerve) plays a vital role in transmitting taste information.
    • Understanding the mechanisms underlying taste signal transmission is essential for comprehending gustatory perception.

    Purpose of the Study:

    • To investigate the role of axonal transport in the IXth nerve for maintaining gustatory nerve responses.
    • To determine if taste discharge mechanisms are dependent on axonal transport.

    Main Methods:

    • Gerbils (Meriones unguiculatus) underwent transection of the IXth nerve.
    • [3H]leucine was injected into the petrosal ganglion to trace axonal transport.
    • Axonal transport was inhibited using colchicine or localized cooling of the IXth nerve.

    Main Results:

    • Transection of the IXth nerve led to a decline in gustatory action potentials.
    • Labeled materials were transported down the IXth nerve to taste papillae.
    • Inhibition of axonal transport by colchicine or cooling significantly impaired transport and reduced taste responses.

    Conclusions:

    • Taste discharge mechanisms are dependent on axonal transport within the IXth nerve.
    • Unimpeded axonal transport is essential for maintaining taste signaling at the taste bud level.

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