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Artifacts in eighth cranial nerve biopsy

Y Collan, J Ylikoski, T Palva

    Acta Oto-Laryngologica
    |January 1, 1980
    PubMed
    Summary
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    Mechanical handling of nerve biopsies causes artifactual changes. Forceps compression leads to lighter staining, fragmented axons, and myelin sheath abnormalities, impacting research findings.

    Area of Science:

    • Neuroscience
    • Histology
    • Pathology

    Background:

    • Artifactual changes can affect biological sample integrity.
    • Understanding mechanical influences on nerve tissue is crucial for accurate interpretation.

    Purpose of the Study:

    • To investigate artifactual morphological changes in human and rat eighth nerve biopsies.
    • To identify specific alterations caused by mechanical handling before fixation.

    Main Methods:

    • Human and rat eighth nerve biopsies were subjected to mechanical handling (forceps compression).
    • Light microscopy and electron microscopy were used to examine tissue morphology.

    Main Results:

    • Compression sites showed lighter staining and denuded, fragmented axons with debris.

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  • Distal areas exhibited thickened myelin sheaths, obscuring axonal canals.
  • Myelin lamellar separation, convoluted forms, diameter variations, and myelin coat ruptures were observed.

    • Conclusions:

    • Mechanical handling induces significant artifactual changes in nerve biopsies.
    • These artifacts, including myelin and axonal damage, must be considered during histological analysis.
    • Proper handling techniques are essential to preserve nerve tissue integrity for research.