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[Structure-functional features of peripheral nerve elements in oligochaetes].

O F David, M Ia Fominykh

    Zhurnal Evoliutsionnoi Biokhimii I Fiziologii
    |November 1, 1977
    PubMed
    Summary

    Earthworm peripheral nerves contain 3-projection neurons that connect to muscles and skin. These neurons likely enable a primitive reflex arc in earthworms.

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    [Neural control of somatic muscle function in the earthworm, Allobophora longa, and in the leech, Hirudo medicinalis].

    Zhurnal evoliutsionnoi biokhimii i fiziologii·1978
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    Zhurnal evoliutsionnoi biokhimii i fiziologii·1977
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    [The nature of the spontaneous electrical activity of the somatic musculature of the earthworm Lumbricus terrestris].

    Zhurnal evoliutsionnoi biokhimii i fiziologii·1974
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    Area of Science:

    • Neurobiology
    • Zoology
    • Comparative Anatomy

    Context:

    • Histological examination of earthworm (Lumbricus terrestris) peripheral nervous system.
    • Focus on neurons within segmentary nerves I and III.

    Purpose:

    • To investigate the structure and potential function of 3-projection neurons in the earthworm.
    • To elucidate the morphological basis of peripheral reflexes.

    Summary:

    • Identified 3-projection neurons in earthworm segmentary nerves I and III.
    • One projection ends between epithelial cells; another branches extensively into longitudinal muscles.
    • These neurons are proposed as the structural foundation for peripheral axon-reflexes.

    Impact:

    • Provides insight into the neuroanatomy of annelids.
    • Contributes to understanding the evolution of reflex mechanisms.
    • Establishes a basis for further research into earthworm neuromuscular function.

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