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Abstract
Taps to the forehead on the midline, at the hairline (Fz), with a reflex hammer or powerful bone conduction vibrator caused short-latency surface potentials from beneath both eyes in all healthy subjects. The earliest negative responses were invariably absent from the eye contralateral to the side of a previous vestibular nerve section but were preserved despite sensorineural hearing loss. These responses probably reflect vestibular function via crossed otolith–ocular pathways.
Footnotes
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Supported by a grant from the National Health and Medical Research Council of Australia.
Disclosure: The authors report no conflicts of interest.
Received July 21, 2006. Accepted in final form December 4, 2006.
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