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Relationship between the facial nerve root and its surrounding vessels
Kuiqi Zhang1, Fu Wang, Yuanxin Zhang
1Department of Oral Basic, Stomatological College, Dalian Medical University, Dalian 116027, China.
Summary
Vascular compression of the facial nerve root is a significant cause of hemifacial spasm. This study found that offending vessels compressed or contacted the facial nerve root in a notable percentage of cases.
Area of Science:
- Neurosurgery
- Neuroanatomy
- Vascular Neurology
Background:
- Hemifacial spasm is a neurological disorder characterized by involuntary contractions of facial muscles.
- Vascular compression of the facial nerve root is a suspected etiology for hemifacial spasm.
Purpose of the Study:
- To investigate the anatomical relationship between the facial nerve root and surrounding blood vessels.
- To determine the prevalence and nature of vascular compression or contact involving the facial nerve root.
Main Methods:
- Surgical dissection and observation of 49 sides of the facial nerve root and adjacent vasculature.
- Detailed analysis of vessel-nerve root interactions.
Main Results:
- Vascular compression of the facial nerve root was identified in 24.5% (12/49) of cases.
- Direct contact between vessels and the facial nerve root occurred in 14.3% (7/49) of cases.
- The anteroinferior cerebellar artery was the most frequent offending vessel, implicated in 68.4% of compressions/contacts.
Conclusions:
- Vascular compression of the facial nerve root is a primary cause of hemifacial spasm.
- Identifying the specific offending vessel is crucial for targeted treatment of hemifacial spasm.