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KMID : 1035420190070040131
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Journal of The Korean Society of Integrative Medicine
2019 Volume.7 No. 4 p.131 ~ p.140
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The Effects of Eye Lateralization on Transient Evoked Otoacoustic Emissions of Auditory Function
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Joo Seok-Hee
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Abstract
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Purpose : The purpose of this study was to investigate the interrelationship between eye movement and auditory function through the effects of eye lateralization on transient evoked otoacoustic emissions of auditory function.
Methods : 25 subjects with complete set of ears were used in this study, which composed of 12 males and 13 females with pure tone threshold of below 25 ㏈ without otolaryngology were evaluated. Each of the patient has a visual acuity of greater than 1.0 after correction, and has no problems with eye disease, eye movement, and human parallel system. In a dark silent room, the subjects sat on a chair with their heads fixed on a headrest. The tests were performed by asking the patients to look at a fixed red light dot on a light bar in front of them. This light was directed to the front, right and left sides of the subject at an angle of 40 ˚ In the presence of the stimulus sound in the ipsilateral ear, the transient evoked otoacoustic emissions of the ipsilateral ear was measured at the straight, right and left fixation. In order to evaluate the transient evoked otoacoustic emissions through the efferent auditory pathway, the transient evoked otoacoustic emission values of the contralateral ear were measured at the straight, right and left fixation. These measurements were taken at frequencies of 1 kHz, 1.4 kHz, 2.0 kHz, 2.8 kHz and 4 kHz, respectively.
Results : Transient evoked otoacoustic emissions caused by lateral movement of the eye showed significant changes at 1.4 ㎑ and 2 ㎑ of the afferent pathway of the ipsilateral ear. Also, significant changes were observed at 1.4 ㎑ and 4 ㎑ of the efferent pathway of the contralateral ear.
Conclusion : These results indicated that there is a close relationship between eye movement and auditory cochlea. In the future, further studies considering more diverse subjects and age groups will be needed.
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KEYWORD
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contralateral ear, eye movement, ipsilateral ear, transient evoked otoacoustic emissions
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