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Oculomotor synkinesis following a midbrain stroke
1Division of Neuro-ophthalmology, Department of Neurology, University of Pennsylvania Medical Center, Philadelphia, PA 19104-4283, USA.
Neurology
|September 26, 2001
Summary
A man experienced third nerve palsy due to bacterial endocarditis and stroke. This case is the first to show oculomotor synkinesis following an acquired central nervous system ischemic lesion.
Area of Science:
- Neurology
- Ophthalmology
- Infectious Diseases
Background:
- Acute bacterial endocarditis can lead to embolic events and central nervous system (CNS) complications.
- Third nerve palsy (oculomotor nerve palsy) is a known neurological deficit associated with various etiologies.
Observation:
- A 33-year-old male presented with complete third nerve palsy.
- Cerebral magnetic resonance imaging (MRI) identified an ischemic stroke in the cerebral peduncle, affecting the third nerve fascicle.
Findings:
- The patient exhibited unusual eyelid elevation during adduction and downgaze, a phenomenon known as oculomotor synkinesis.
- This represents the first documented instance of oculomotor synkinesis occurring subsequent to an acquired ischemic lesion within the CNS.
Implications:
- This case expands the understanding of potential neurological sequelae following CNS ischemic events.
- It highlights the complex interplay between vascular events, infectious endocarditis, and aberrant neural pathway recovery.
- Further research may elucidate the specific mechanisms underlying synkinesis in acquired ischemic CNS lesions.