The generation of DPOAEs in the locust ear is contingent upon the sensory neurons
The generation of DPOAEs in the locust ear is contingent upon the sensory neurons
复制标题
蝗虫耳朵中 DPOAE 的产生取决于感觉神经元
DOI：
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
M. Kössl
中科院分区：
文献类型：
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作者：
Doreen Möckel;E. Seyfarth;M. Kössl
昆虫的鼓室器官发出失真产物耳声发射(DPOAEs)，这是非线性耳朵力学的标志。我们的研究试图(1)确定蝗虫耳朵中DPOAE产生的限制条件，以及(2)确定涉及的感觉结构。我们选择性地破坏了(外周)感觉神经节和d细胞树突的鼓室连接点之间的连接；d细胞对高于12 kHz的声音频率最敏感。这导致f2频率高于15 kHz时诱发的DPOAEs减少(减少15-40dB值；平均28dB值；n=12个器官)。低频诱发的DPOAEs无明显变化。在排除了一个节节亚群后，这种特定频率的变化表明，这些听觉节节实际上是昆虫中DPOAE的来源。电刺激听神经(短电流脉冲为4-10μA或直流电流为0.5μA)可使DPOAEs可逆地降低30%分贝。我们认为逆行电刺激主要影响脊柱的神经元部分。从中枢神经系统(CNS)切断听神经不会改变DPOAE的幅度，也不会改变电刺激的效果。
Tympanal organs of insects emit distortion-product otoacoustic emissions (DPOAEs) that are indicative of nonlinear ear mechanics. Our study sought (1) to define constraints of DPOAE generation in the ear of Locusta migratoria, and (2) to identify the sensory structures involved. We selectively destroyed the connection between the (peripheral) sensory ganglion and the tympanal attachment points of the “d-cell” dendrites; d-cells are most sensitive to sound frequencies above 12 kHz. This led to a decrease of DPOAEs that were evoked by f2 frequencies above 15 kHz (decrease of 15–40 dB; mean 28 dB; n = 12 organs). DPOAEs elicited by lower frequencies remained unchanged. Such frequency-specific changes following the exclusion of one scolopidial sub-population suggest that these auditory scolopidia are in fact the source of DPOAEs in insects. Electrical stimulation of the auditory nerve (with short current pulses of 4–10 μA or DC-currents of 0.5 μA) reversibly reduced DPOAEs by as much as 30 dB. We assume that retrograde electrical stimulation primarily affected the neuronal part of the scolopidia. Severing the auditory nerve from the central nervous system (CNS) did not alter the DPOAE amplitudes nor the effects of electrical stimulation.
影响因子：
2.4
作者：
Liberman, MC;Zuo, J;Guinan, JJ
通讯作者：
Guinan, JJ
DOI：
10.1121/1.415857
发表时间：
1996
期刊：
The Journal of the Acoustical Society of America
影响因子：
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作者：
Mills,DM;Rubel,EW
通讯作者：
Rubel,EW