Abstract
Auditory perceptual and visual-spatial characteristics of subjective
tinnitus evoked by eye gaze were studied in two adult human subjects.
This uncommon form of tinnitus occurred approximately 4-6 weeks following
neurosurgery for gross total excision of space-occupying lesions
of the cerebellopontine angle and hearing was lost in the operated
ear. In both cases, the gaze-evoked tinnitus was characterized as
being tonal in nature, with pitch and loudness percepts remaining
constant as long as the same horizontal or vertical eye directions
were maintained. Tinnitus was absent when the eyes were in a neutral
head-referenced position with subjects looking straight ahead. The
results and implications of ophthalmological, standard and modified
visual-field assessment, pure-tone audiometric assessment, spontaneous
otoacoustic emission testing and detailed psychophysical assessment
of pitch and loudness are discussed.
- acoustic,
- aged;
- angle,
- audiometry,
- brain
- cerebellopontine
- complications/pathology/surgery;
- diagnosis/etiology;
- emissions,
- etiology;
- eye
- female;
- fields
- hearing
- high-frequency,
- humans;
- loss,
- loudness
- male;
- meningioma,
- middle
- movements;
- neoplasms,
- neuroma,
- otoacoustic
- pathology/surgery;
- perception;
- pitch
- pure-tone;
- spontaneous;
- tinnitus,
- visual
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