hereditary geniospasm
MONDO:0008588Mondo
Findings
No curated finding names hereditary geniospasm yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Hereditary geniospasm is a movement disorder characterized by episodes of involuntary tremor of the chin and lower lip.
Definition from the Mondo Disease Ontology (MONDO:0008588), read 2026-09-29. CC BY 4.0.
Features
4 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, annotations 2026-09-02.
- Chin myoclonusHPOHP:0012462
- Obligate (100% of cases)
- Abnormality of mentalis muscleHPOHP:3000007
- Very frequent (80% to 99% of cases)
- Abnormal lower lip morphologyHPOHP:0000178
- Occasional (5% to 29% of cases)
- Abnormal social behaviorHPOHP:0012433
- Occasional (5% to 29% of cases)
Reported absent (3)
- EEG abnormalityHPOHP:0002353
- EMG abnormalityHPOHP:0003457
- Intention tremorHPOHP:0002080
Where it sits
- A kind of
Other names
3 names
Resolves to: hereditary geniospasm
- Also called
- familial trembling of the chinhereditary chin myoclonushereditary chin-trembling