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Vascular Spasm

Vascular Spasm

The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...

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Related Experiment Video

Updated: Jan 12, 2026

Microvascular Decompression: Salient Surgical Principles and Technical Nuances

Microvascular Decompression: Salient Surgical Principles and Technical Nuances

Published on: July 5, 2011

Microvascular Decompression in a Patient With Positional Hemifacial Spasm: Case Report.

Christopher Adams¹, Ali Samii², Turner Peckham¹

¹Department of Neurology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA.

Neurosurgery Practice

|October 30, 2025

Summary

This summary is machine-generated.

This is the first reported case of position-dependent hemifacial spasm (HFS) in the prone position. Surgical decompression completely resolved the patient's HFS, highlighting a novel treatment approach.

Area of Science:

Neurology
Neurosurgery

Background:

Hemifacial spasm (HFS) is typically caused by vascular compression of the facial nerve.
Rarely, HFS can be position-dependent, influenced by patient posture.

Keywords:

Case report Hemifacial spasm Microvascular decompression

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This study details a unique case of HFS triggered by the prone position.