摘要
为探讨豚鼠耳蜗基底膜的听觉机制,利用多普勒激光测振技术进行了声音在28只成年健康豚鼠耳中传递的测试实验.将豚鼠麻醉后切断头取出听泡,采用电钻暴露其耳蜗基底膜,利用多普勒激光测振仪在给定的声压级、频率的纯音激励条件下测量豚鼠外耳道耳蜗基底膜的振动速度,并测量了中耳镫骨的振动速度.结果表明,豚鼠外耳道基底膜具有频率选择特性,而且其基底膜的振动具有行波特性.
In order to study the auditory mechanism of the guniea pig cochlea,the stapes footplate(SF)and basilar membrane(BM)velocity responses to pure tone were measured using a laser Doppler velocimetry which was able to measure sub-nanometer vibration from the middle ear and cochlea of the guinea pig.The BM velocity was measured by a reflective microbeads placed onto the scala tympani surface of the BM.The velocity response of the SF was also tested,allowing the calculation of a BM transfer function.The transfer function shows typical tuning features.For a given BM location,the characteristic frequency(CF)of the BM was about 11 kHz.The results show that frequency selectivity and travelling wave exist in the BM.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2016年第2期200-203,208,共5页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金项目(11072145,81170910)
上海市科学技术委员会项目(114119a6500)资助
关键词
豚鼠
镫骨
耳蜗
多普勒激光
听觉机制
振动特性
guinea pig
stapes
cochlea
Doppler laser
auditory mechanism
vibration characteristics