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Paroxysmal dystonia with thalamic lesion in multiple sclerosis
A Zenzola1, M De Mari, R De Blasi
1Department of Neurological Science, Second Neurological Clinic, Policlinico, University of Bari, Italy.
Summary
Paroxysmal dystonia, a painful movement disorder, can occur in multiple sclerosis. Lesions in the thalamus were linked to these symptoms in two new cases.
Area of Science:
- Neurology
- Neuroscience
- Movement Disorders
Background:
- Paroxysmal dystonia (PD) is characterized by sudden, involuntary muscle contractions.
- Triggers include voluntary movement, tactile stimuli, noise, and hyperventilation.
- PD is often unilateral and painful.
Observation:
- Two cases of paroxysmal dystonia in patients with multiple sclerosis are presented.
- Both patients had lesions localized to the thalamus.
- The thalamic lesions were contralateral to the side experiencing dystonic symptoms.
Findings:
- Thalamic lesions are implicated in the pathophysiology of paroxysmal dystonia in multiple sclerosis.
- This presentation is rare, with only one prior reported case of thalamic demyelination causing PD.
Implications:
- Highlights the thalamus as a critical structure in the development of paroxysmal dystonia.
- Suggests a need for careful neurological examination and neuroimaging in MS patients presenting with dystonic symptoms.
- Contributes to understanding the diverse clinical manifestations of multiple sclerosis.