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Spectrum of movement disorders in encephalitis
1Department of Neurology, Center of Excellence of Encephalitis Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Raebareily Road, Lucknow, 226014, Uttar Pradesh, India. drukmisra@rediffmail.com
Journal of Neurology
|July 20, 2010
Summary
Movement disorders are common in encephalitis, particularly Japanese encephalitis (JE). Dystonia, a type of movement disorder, is linked to poorer outcomes compared to parkinsonian features.
Area of Science:
- Neurology
- Infectious Diseases
- Radiology
Background:
- Encephalitis can lead to various neurological complications, including movement disorders.
- Understanding the types of movement disorders and their correlation with imaging and outcomes is crucial for patient management.
Purpose of the Study:
- To investigate the frequency and types of movement disorders in encephalitis patients.
- To correlate these movement disorders with magnetic resonance imaging (MRI) findings and patient outcomes.
Main Methods:
- Consecutive encephalitis patients with movement disorders were enrolled.
- Encephalitis types were identified using ELISA or CSF PCR (Japanese encephalitis, dengue, etc.).
- Movement disorder severity and cranial MRI findings (T1, T2, FLAIR) were assessed; outcomes were evaluated at 6 months.
Main Results:
- 74 out of 209 encephalitis patients (35.4%) exhibited movement disorders.
- Japanese encephalitis (JE) was the most common cause (67.6%), followed by nonspecific (51.2%) and dengue encephalitis (11.3%).
- Parkinsonian features and dystonia were the predominant movement disorders; JE and substantia nigra MRI involvement correlated with higher frequency.
Conclusions:
- Movement disorders are a significant complication of encephalitis, especially JE.
- Dystonia is associated with worse outcomes than parkinsonian features alone.
- Specific anatomical involvement on MRI, particularly the substantia nigra, is linked to movement disorders in encephalitis.
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