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KMID : 0378019840270120113
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New Medical Journal
1984 Volume.27 No. 12 p.113 ~ p.117
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Experimental Study of Corti´s Organ after Exposure to Jet Noise
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Abstract
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It is well known that exposure to excessive noise causes the hair cell damage of Corti´s organ and is the cause of noise induced hearing loss.
The purpose of this experiment is to investigate the effect of noise on the morphology of hair cell nuclei in cochlea after exposure of guinea pigs to jet noise 2hours everyday for one week.
Cytological observation was performed with surface preparation technique and cochleogram.
The following results were obtained:
l. The significant pathologic changes were observed in the entire turns, but most severe in basal turn, similar but less severe in 2nd turn and mild in apical turn of cochlea of Guinea pigs.
2. Cellular arrangement is most disturbed in the upper part of basal turn and the second turn.
3. Pathologic changes such as swelling, pycnosis and necrosis of hair cells were mainly found in outer hair cells.
4. Among the outer hair cells, the pathologic change was the severest in the outer layer of outer hair cells.
5. It is adviserable for the workers working in the environment of jet noise to wear ear plugs and ear muffs.
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KEYWORD
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