Abstract
In 20 consecutive patients with isolated medial medullary infarction, abnormal ocular motor findings included nystagmus (n = 8), ocular contrapulsion (n = 5), and contralesional ocular tilt reaction (n = 2). The nystagmus was ipsilesional (n = 4), gaze-evoked (n = 5), upbeating (n = 4), and hemiseesaw (n = 1). The ocular motor abnormalities may be explained by involvements of the nucleus prepositus hypoglossi, medial longitudinal fasciculus or efferent fibers from the vestibular nuclei, climbing fibers, and cells of the paramedian tracts.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Adult
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Aged
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Brain Stem Infarctions / complications*
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Brain Stem Infarctions / diagnosis
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Brain Stem Infarctions / physiopathology*
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Cerebellum / physiopathology
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Eye Movements / physiology
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Female
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Humans
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Magnetic Resonance Imaging
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Male
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Medulla Oblongata / blood supply
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Medulla Oblongata / pathology
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Medulla Oblongata / physiopathology*
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Middle Aged
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Neural Pathways / blood supply
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Neural Pathways / pathology
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Neural Pathways / physiopathology
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Nystagmus, Pathologic / diagnosis
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Nystagmus, Pathologic / etiology
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Nystagmus, Pathologic / physiopathology
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Ocular Motility Disorders / diagnosis
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Ocular Motility Disorders / etiology*
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Ocular Motility Disorders / physiopathology*
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Oculomotor Muscles / innervation
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Oculomotor Muscles / physiopathology
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Olivary Nucleus / blood supply
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Olivary Nucleus / pathology
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Olivary Nucleus / physiopathology
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Vertebral Artery / anatomy & histology
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Vertebral Artery / physiopathology
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Vestibular Nuclei / blood supply
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Vestibular Nuclei / pathology
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Vestibular Nuclei / physiopathology