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Related Experiment Video

Updated: Jun 28, 2026

Spinal Cord Lateral Hemisection and Asymmetric Behavioral Assessments in Adult Rats

Spinal Cord Lateral Hemisection and Asymmetric Behavioral Assessments in Adult Rats

Published on: March 24, 2020

[Hemifacial spasms and vertebral dolichoectasias].

M Arantes¹, R Garcia, J R Pereira

¹Servicio de Neurorradiología, Hospital Pedro Hispano, Matosinhos, Portugal. mavildearantes@hotmail.com

Revista De Neurologia

|November 6, 2008

Summary

Vertebral artery dolichoectasia can cause hemifacial spasm (HFS) by compressing the facial nerve. Advanced imaging like MRI and MRA are crucial for diagnosing this rare cause of HFS.

Area of Science:

Neurology
Neurosurgery
Radiology

Background:

Hemifacial spasm (HFS) involves involuntary facial muscle contractions on one side.
It typically results from facial nerve irritation, often due to vascular compression at the brainstem.

Observation:

Three cases of HFS were identified with vertebral artery dolichoectasia.
This condition involved enlarged, elongated vertebral arteries compressing the facial nerve.

Findings:

Magnetic resonance imaging (MRI) and magnetic resonance angiography (MRA) revealed vertebral dolichoectatic arteries.
These findings confirmed the vascular compression as the cause of HFS in these patients.

Implications:

MRI and MRA are essential for diagnosing vertebral artery dolichoectasia causing HFS.

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Last Updated: Jun 28, 2026

Spinal Cord Lateral Hemisection and Asymmetric Behavioral Assessments in Adult Rats

Spinal Cord Lateral Hemisection and Asymmetric Behavioral Assessments in Adult Rats

Published on: March 24, 2020

These non-invasive imaging techniques help identify vascular compression and rule out other HFS etiologies.