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Neurohistological changes after facial nerve rerouting

B E Mostafa1, M M Samir

  • 1Department of Otolaryngology, Ain-Shams University, Cairo, Egypt.

European Archives of Oto-Rhino-Laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery
|April 30, 1998
PubMed
Summary

Facial nerve rerouting causes significant structural damage, including axon and connective tissue changes. Clinical facial rehabilitation should be delayed post-surgery to allow for nerve recovery.

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Area of Science:

  • Neuroscience
  • Surgical Anatomy

Background:

  • Facial nerve rerouting is a surgical procedure.
  • Understanding structural changes post-rerouting is crucial for patient recovery.

Purpose of the Study:

  • To investigate structural alterations in the facial nerve following surgical rerouting.
  • To assess the timeline and nature of these changes.

Main Methods:

  • 20 adult guinea pigs underwent facial nerve rerouting.
  • Nerves were analyzed at 7 days (early group) and 15 days (late group) post-surgery.
  • Histological staining examined axons, Schwann cells, connective tissue, and cellular infiltrate.

Main Results:

  • Significant structural changes observed in axons, Schwann cells, and connective tissue in both early and late groups.

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  • Marked cellular infiltrate present, slightly reduced in the late group.
  • Increased reticulin network thickness and greater disruption of nerve bundles noted in the late group.

    • Conclusions:

    • Facial nerve rerouting induces substantial structural changes.
    • These changes can persist for varying durations.
    • Clinical intervention for facial rehabilitation should be postponed until sufficient nerve recovery is evident.