[Paroxysmal dysarthria and ataxia - unusual MS manifestation]

Area of Science:

• Neurology
• Neuroimmunology
• Neuroscience

Background:

• Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system.
• While many MS patients experience permanent symptoms, some develop transient, paroxysmal deficits.
• Paroxysmal dysarthria and ataxia (PDA) is an uncommon paroxysmal manifestation in MS.

Observation:

• A 48-year-old female patient with a recent MS diagnosis presented with episodes of dysarthria and ataxia.
• The paroxysmal symptoms were associated with a lesion in the midbrain.
• The underlying mechanism is hypothesized to involve ephaptic neurotransmission within demyelination plaques.

Findings:

• The patient's paroxysmal dysarthria and ataxia were effectively managed with carbamazepine, an anti-seizure medication.
• This case adds to the limited reported instances of PDA in multiple sclerosis patients.
• The midbrain lesion's role in triggering PDA symptoms was identified.

Implications:

• Anti-seizure medications, such as carbamazepine, represent a viable treatment option for managing paroxysmal dysarthria and ataxia in MS.
• Further research into the mechanisms of ephaptic activation in demyelinating lesions is warranted.
• Recognition of PDA as a treatable symptom can improve the quality of life for affected MS patients.