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June 1980

Oculomotor and Oculovestibular Functions in a Hemispherectomy Patient

Author Affiliations

From the Departments of Neurology (Drs Estañol and Mateos), Neuro-otology (Drs Romero and Corvera) and Neuro-ophthalmology (Dr Sáenz de Viteri), General Hospital, National Medical Center, and the National University of Mexico, Mexico City.

Arch Neurol. 1980;37(6):365-368. doi:10.1001/archneur.1980.00500550067009

• Oculomotor and oculovestibular functions in a patient who had undergone a left hemispherectomy were examined under a variety of visual and vestibular stimuli. The main findings were an inability to hold left eccentric gaze, resulting in gaze-evoked nystagmus to that side; inaccurate saccades to the right; defective smooth pursuit to the left; asymmetrical vestibulo-ocular responses (VOR) in the dark due to the interaction of the VOR with the "spasticity of conjugate gaze"; decreased gain of the visuo-vestibulo-ocular reflexes to both sides, more marked to the right, when rotated fixating on a stationary wall target or the environment, due to abnormal smooth and optokinetic systems; and failure to inhibit the VOR when rotated to the left with visual fixation.

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