Progress in brain research · 2019
Eye position-dependent opsoclonus in mild traumatic brain injury.
Клинический случайСтатьяResearch Support, N.I.H., IntramuralНазвание и аннотация: Перевод в очереди
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Rizzo John-Ross, Hudson Todd E, Sequeira Alexandra J, Dai Weiwei, Chaudhry Yash, Martone John, Zee David S, Optican Lance M, Balcer Laura J, Galetta Steven L, Rucker Janet C
Аннотация
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.