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Related Experiment Videos

Synaptic ring images after silver impregnation.

G E Novotny

    Cell and Tissue Research
    |January 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Ring images in the monkey lateral geniculate nucleus are caused by silver deposits on ring-shaped neurofilament accumulations in retinal synapses. Tubular axon impregnation does not create these structures.

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    Area of Science:

    • Neuroscience
    • Cell Biology
    • Histology

    Background:

    • Contradictory findings exist regarding the origin of ring images observed after neurofibrillar silver impregnation.
    • Understanding these structures is crucial for interpreting ultrastructural studies of neural tissue.

    Purpose of the Study:

    • To clarify the ultrastructural basis of ring images in the monkey lateral geniculate nucleus.
    • To resolve discrepancies in previous research on silver-impregnated neural structures.

    Main Methods:

    • Ultrastructural analysis using electron microscopy.
    • Neurofibrillar silver impregnation techniques applied to monkey lateral geniculate nucleus tissue.
    • High-resolution imaging to examine synaptic structures and silver deposits.

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    Main Results:

    • Ring images are formed by silver deposits specifically on ring-shaped aggregations of neurofilaments.
    • These neurofilament rings are located within afferent synapses originating from the retina.
    • Evidence for tubular impregnation of axons contributing to ring image formation was not found.

    Conclusions:

    • The study definitively identifies the composition and location of ring images in the specified brain region.
    • Retinal afferent synapses containing neurofilament rings are the source of these artifacts.
    • The findings provide a clear ultrastructural explanation, resolving previous ambiguities.