정상인의 반대측 귀 자극음이 일과성유발이음향방사에 미치는 영향

서지정보

ㆍ발행기관 : 한국청각언어재활학회 ㆍ수록지정보 : 청능재활 / 2권 / 2호
ㆍ저자명 : 조수진, 조소현, 최미정

목차

INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSIONS
CONCLUSIONS
REFERENCES

한국어 초록

청각시스템(auditorysystem)은 음향자극이와우(cochlear)에서 청각피질(auditory cortex)에 이르는 구심성 전달경로(afferent pathway)와 반대로 청각피질에서 와우에 이르는 원심성 전달경로(efferent pathway)로 이루어져 있다. 이 중 구심성 전달경로에 대한 연구는 동물이나 인
간에 있어서 광범위하게 이루어져 왔으나, 원심성 전달경로는 아직도 밝혀내야 할 부분이 많이 있다. Rasmussen(1946)21)에 의해 메커니즘이 밝혀진 올리브와우삭(olivocochlearbundle)
은 상올리브복합체(superior olivary complex)의 내측에 위치해 있는 내측 올리브와우삭(medial
olivo-cochlear bundle, 이하 MOCB)과 외측에 위치해 있는 외측 올리브와우삭(lateral olivo-cochlear bundle, 이하 LOCB)으로 이루어져 있다. MOCB은 직경이 LOCB보

영어 초록

During measurements of transient evoked otoacoustic emission (TEOAE), acoustic stimulation of the contralateral ear reduces or suppresses TEOAE amplitude. This is thought to be due to the inhibitory control that the medial olivo-cochlear bundle (MOCB) exerts on the outer hair cell function. The purpose of this study was to investigate effects of contralateral stimulus on TEOAE. Contralateral suppression of TEOAE using four types of stimulus was measured in 30 young adults (30 ears) with normal hearing at 30, 40, 50 dBSPL. Contralateral stimuli were broad band noise (BBN), narrow band noise (NBN), amplitude modulation (AM) and frequency
modulation (FM). This study showed that TEOAE suppression using contralateral noises increased orderly AM, FM, NBN and BBN at 40 and 50 dBSPL. Except for BBN, there was no significant difference between NBN, AM and FM. And as contralateral noise
levels from 30 dBSPL to 50 dBSPL increase, TEOAE suppression also increased. But there was no the effect of gender. These results indicated that OAE represented a means of functional exploration of the active micro-mechanical properties of OHCs and our study
was meaningful in the light of indicating amplitude fluctuation and frequency bandwidth effects in MOCB activation.

KEY WORDS：MOCB·Efferent system·TEOAE suppression.

참고 자료

없음