Mechanical basis of otoacoustic emissions in tympanal hearing organs
Mechanical basis of otoacoustic emissions in tympanal hearing organs
复制标题
鼓室听觉器官耳声发射的力学基础
DOI:
10.1007/s00359-014-0914-2
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Kössl M
中科院分区:
文献类型:
--
作者:
Möckel D;Nowotny M;Kössl M
Tympanal hearing organs of insects emit distortion–product otoacoustic emissions (DPOAEs), which in mammals are used as indicator for nonlinear cochlear amplification, and which are highly vulnerable to manipulations interfering with the animal’s physiological state. Although in previous studies, evidence was provided for the involvement of auditory mechanoreceptors, the source of DPOAE generation and possible active mechanisms in tympanal organs remained unknown. Using laser Doppler vibrometry in the locust ear, we show that DPOAEs mechanically emerge at the tympanum region where the auditory mechanoreceptors are attached. Those emission-coupled vibrations differed remarkably from tympanum waves evoked by external pure tones of the same frequency, in terms of wave propagation, energy distribution, and location of amplitude maxima. Selective inactivation of the auditory receptor cells by mechanical lesions did not affect the tympanum’s response to external pure tones, but abolished the emission’s displacement amplitude peak. These findings provide evidence that tympanal auditory receptors, comparable to the situation in mammals, comprise the required nonlinear response characteristics, which during two-tone stimulation lead to additional, highly localized deflections of the tympanum.
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DOI:
10.1016/j.cub.2013.08.028
发表时间:
2013-10-07
期刊:
Current biology : CB
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1007/bf00663438
发表时间:
2004
期刊:
Journal of comparative physiology
影响因子:
--
作者:
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通讯作者:
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DOI:
--
发表时间:
2007
期刊:
Journal of Comparative Physiology
影响因子:
--
作者:
M. Kössl;F. Coro;E. Seyfarth;W. Nässig
通讯作者:
W. Nässig
DOI:
--
发表时间:
2007
期刊:
Journal of Comparative Physiology
影响因子:
--
作者:
Doreen Möckel;E. Seyfarth;M. Kössl
通讯作者:
M. Kössl
DOI:
10.1098/rstb.1960.0005
发表时间:
1960-01-01
期刊:
PHIL TRANS ROY SOC LONDON SER B BIOL SCI
影响因子:
--
作者:
GRAY, E. G.
通讯作者:
GRAY, E. G.