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Войти в исследования American journal of ophthalmology · 1996
Localization of traumatic oculomotor nerve palsy to the midbrain exit site by magnetic resonance imaging.
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Balcer L J, Galetta S L, Bagley L J, Pakola S J
Аннотация
PURPOSE: To present the magnetic resonance imaging findings for a patient with traumatic oculomotor nerve injury.
METHODS: We examined a patient with a right pupil-involving oculomotor nerve palsy after severe closed head trauma.
RESULTS: Magnetic resonance imaging of the brain demonstrated marked signal hypointensity on gradient-echo T2*-weighted images consistent with hemorrhage at the midbrain exit site of the right oculomotor nerve.
CONCLUSIONS: Distal fascicular damage or partial rootlet avulsion is a mechanism of injury in some traumatic oculomotor nerve palsies. Gradient-echo T2*-weighted magnetic resonance imaging is the most sensitive method to detect hemorrhagic changes associated with shearing injury.
METHODS: We examined a patient with a right pupil-involving oculomotor nerve palsy after severe closed head trauma.
RESULTS: Magnetic resonance imaging of the brain demonstrated marked signal hypointensity on gradient-echo T2*-weighted images consistent with hemorrhage at the midbrain exit site of the right oculomotor nerve.
CONCLUSIONS: Distal fascicular damage or partial rootlet avulsion is a mechanism of injury in some traumatic oculomotor nerve palsies. Gradient-echo T2*-weighted magnetic resonance imaging is the most sensitive method to detect hemorrhagic changes associated with shearing injury.