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Related Experiment Video

Updated: Jun 16, 2026

Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer

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Published on: March 1, 2015

[Neurovascular interactions in hemifacial spasm].

Iu A Grigorian, A R Sitnikov

Zhurnal Voprosy Neirokhirurgii Imeni N. N. Burdenko

|February 11, 2010

Summary

Vascular decompression effectively treats hemifacial spasm (HS) by relieving facial nerve compression at the root exit zone (REZ). This surgical approach offers a safe and highly effective treatment for HS patients.

Area of Science:

Neurosurgery
Neurology
Microsurgery

Context:

Hemifacial spasm (HS) is a neurological disorder characterized by involuntary contractions of facial muscles.
Compression of the facial nerve root exit zone (REZ) by aberrant blood vessels is a primary cause of HS.
Understanding the morphology of the facial nerve REZ is crucial for surgical planning.

Purpose:

To evaluate the surgical treatment outcomes for 37 patients with hemifacial spasm (HS).
To correlate morphological findings of the facial nerve REZ with intraoperative observations.
To assess the efficacy and safety of vascular decompression surgery for HS.

Summary:

Surgical treatment involved 37 patients with HS, with morphological studies revealing a central myelinated zone extension of 0.9-3.6 mm at the facial nerve REZ.

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Facial Nerve Surgery in the Rat Model to Study Axonal Inhibition and Regeneration

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Published on: May 5, 2020

Intraoperative findings indicated vascular compression in all cases, with the anterior inferior cerebellar artery (AICA) being the most common culprit.

Complete decompression was achieved in 35 patients, leading to excellent surgical outcomes in 33 cases with no serious postoperative complications.

Impact:

Vascular decompression is a highly effective and safe procedure for treating hemifacial spasm.
The study supports the hypothesis that HS results from compression of the facial nerve's central myelinated zone.
Surgical decompression should be performed precisely at the brainstem REZ to address the underlying pathology of HS.