Clinical Approach to Supranuclear Brainstem Saccadic Gaze Palsies
Alexandra Lloyd-Smith Sequeira1, John-Ross Rizzo1,2, Janet C Rucker1,3
1Department of Neurology, New York University School of Medicine, New York, NY, United States.
Frontiers in Neurology
|September 8, 2017
Summary
Supranuclear saccadic gaze palsy (SGP) results from brainstem dysfunction, affecting eye movement speed and range. Diagnosis considers causes like stroke or progressive supranuclear palsy.
Area of Science:
- Neuroscience
- Ophthalmology
- Neurology
Background:
- Supranuclear saccadic gaze palsy (SGP) arises from impaired brainstem centers controlling saccadic eye movements.
- Clinical signs include slowed saccades, limited eye movement range, and absent optokinetic nystagmus quick phases.
- Vestibular-ocular reflexes can overcome range limitations, differentiating SGP from other conditions.
Purpose of the Study:
- To review the brainstem anatomy and physiology of saccade generation.
- To detail the clinical features of SGPs, incorporating quantitative ocular motor recording insights.
- To explore the differential diagnosis of SGPs.
Main Methods:
- Review of neuroanatomical and physiological principles of saccade generation.
- Analysis of clinical manifestations of SGP.
- Discussion of diagnostic approaches, including quantitative ocular motor recordings.
- Examination of etiological factors contributing to SGP.
Main Results:
- SGP involves dysfunction of the brainstem saccade-generating network.
- Ocular motor recordings provide valuable insights into SGP pathophysiology.
- Acute SGP often indicates brainstem infarction; chronic vertical SGP suggests progressive supranuclear palsy.
Conclusions:
- Understanding brainstem saccade control is crucial for diagnosing SGP.
- Quantitative ocular motor analysis aids in characterizing SGP.
- A broad differential diagnosis is essential for effective SGP management.
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