Eye position-dependent opsoclonus in mild traumatic brain injury.
Prog Brain Res
; 249: 65-78, 2019.
Article
em En
| MEDLINE
| ID: mdl-31325998
ABSTRACT
Opsoclonus consists of bursts of involuntary, multidirectional, back-to-back saccades without an intersaccadic interval. We report a 60-year-old man with post-concussive headaches and disequilibrium who had small amplitude opsoclonus in left gaze, along with larger amplitude flutter during convergence. Examination was otherwise normal and brain MRI was unremarkable. Video-oculography demonstrated opsoclonus predominantly in left gaze and during pursuit in the left hemifield, which improved as post-concussive symptoms improved. Existing theories of opsoclonus mechanisms do not account for this eye position-dependence. We discuss theoretical mechanisms of this behavior, including possible dysfunction of frontal eye field and/or cerebellar vermis neurons; review ocular oscillations in traumatic brain injury; and consider the potential relationship between the larger amplitude flutter upon convergence and post-traumatic ocular oscillations.
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Base de dados:
MEDLINE
Assunto principal:
Movimentos Sacádicos
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Concussão Encefálica
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Transtornos da Motilidade Ocular
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Fixação Ocular
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article