Tardive blepharospasm
José Fidel Baizabal-Carvallo1,2, Joseph Jankovic3
1Department of Neurology, Parkinson's Disease Center and Movement Disorders Clinic, Baylor College of Medicine, Houston, TX, USA. baizabaljf@hotmail.com.
Journal of Neurology
|August 9, 2026
Summary
Tardive blepharospasm (BSP) affects one-fifth of patients with tardive syndromes and presents differently than idiopathic BSP. Tardive BSP is associated with younger age, more severe movements, and other movement disorders.
Area of Science:
- Neurology
- Movement Disorders
- Pharmacology
Background:
- Tardive syndromes encompass various movement disorders, with blepharospasm (BSP) being a less understood condition.
- While typically idiopathic, BSP can be drug-induced (tardive BSP), but its frequency and characteristics are poorly documented.
Purpose of the Study:
- To investigate the clinical features of tardive BSP.
- To compare these features with those of idiopathic BSP.
Main Methods:
- Assessed 72 patients with tardive syndromes for BSP.
- Utilized the Abnormal Involuntary Movement Scale (AIMS) and Jankovic Rating Scale (JRS) for severity assessment.
- Compared tardive BSP patients with idiopathic BSP patients (n=37) and other tardive syndromes.
Main Results:
- Tardive BSP was identified in 15 (20.8%) patients with tardive syndromes.
- Tardive BSP patients were younger, had higher AIMS scores, and more frequent akathisia and facial dystonia than other tardive syndromes.
- Compared to idiopathic BSP, tardive BSP patients were younger and had more orobuccolingual (OBL) stereotypy, limb/trunk stereotypies, akathisia, and facial dystonia; eyelid opening apraxia was unique to idiopathic BSP.
Conclusions:
- Tardive BSP is a distinct entity found in approximately one-fifth of patients with diverse tardive syndromes.
- Key differentiating features include younger age of onset and specific associated movement disorders like OBL stereotypy and akathisia.
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