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Familial hemifacial spasm.
J B Carter1, J R Patrinely, J Jankovic
1Department of Ophthalmology, Cullen Eye Institute, Houston, Tex.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|February 1, 1990
Summary
This study identifies a potential genetic link in hemifacial spasm, suggesting an autosomal dominant inheritance pattern. Familial cases may present with earlier onset and consistent facial side involvement.
Area of Science:
- Neurology
- Genetics
- Neuroanatomy
Background:
- Hemifacial spasm (HFS) is an involuntary movement disorder affecting facial muscles.
- While often idiopathic or secondary to vascular compression, familial cases are increasingly recognized.
Observation:
- Three male patients across successive generations of a single family presented with acquired left-sided hemifacial spasm.
- The proband's MRI revealed a pontine vertebral artery anomaly adjacent to the facial nerve root.
Findings:
- Hemifacial spasm may exhibit autosomal dominant inheritance.
- Facial involvement in familial HFS is consistently ipsilateral (same side) within a family.
- Familial cases of hemifacial spasm can have a younger age of onset compared to non-familial cases.
Implications:
- This suggests a potential genetic predisposition and etiology for certain hemifacial spasm cases.
- Understanding familial patterns aids in diagnosis and genetic counseling for hemifacial spasm.
- Further research into vascular anomalies and genetic factors in HFS is warranted.