HUMAN AUDITORY ATTENTION - THE OLIVOCOCHLEAR BUNDLE MAY FUNCTION AS A PERIPHERAL FILTER
HUMAN AUDITORY ATTENTION - THE OLIVOCOCHLEAR BUNDLE MAY FUNCTION AS A PERIPHERAL FILTER
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DOI：
10.1111/j.1469-8986.1980.tb00181.x
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发表时间：
1980-01-01
期刊：
影响因子：
3.7
通讯作者：
LUKAS, JH
中科院分区：
文献类型：
--
作者：
LUKAS, JH
两个实验[exp]研究了集中注意力到视觉显示是否会改变人类听觉神经和脑干中心的感觉传递特性，使其变成不相关的听觉音调。在第一个实验中，16名受试者要么听1000 Hz，50 dB SL [声级]的音调，以10/s的速度双耳呈现（听），要么在屏幕上快速闪烁（看）。在10 ms扫描和150-1500 Hz带通条件下，对500个组中从头顶记录的听觉脑干电位进行在线平均。在注视试验期间，从下丘产生的波5（7.322 ms潜伏期）的振幅显著降低16.4%，潜伏期增加27 μ s。8名受试者的第二次实验表明，当使用800 Hz刺激时，注意力的影响仅限于听觉神经成分，但当使用中频（2000 Hz）音调时，注意力对听觉神经和丘成分的影响都很显著。在对视觉刺激的集中注意期间，无关的听觉刺激可能在外围水平上通过传出橄榄耳蜗束的作用而被衰减。
Two experiments [exp] examined whether focused attention toward a visual display would alter the sensory transmission properties of the human auditory nerve and brainstem centers to irrelevant auditory tone pips. In the 1st exp, 16 subjects either listened to 1000 Hz, 50dB SL [sound level] tone pips presented binaurally at 10/s (listen), or mentally counted letters flashed rapidly on a screen (look). The auditory brainstem potentials recorded from the vertex were averaged on-line in groups of 500 with a 10 ms sweep and a bandpass of 150-1500 Hz. During the look trials, Wave 5 generated from the inferior colliculus (7.322 ms latency) was significantly reduced in amplitude by 16.4% and increased in latency by 27 .mu.s. A 2nd exp with 8 subjects demonstrated that the effects of attention are limited to the auditory nerve component when using 800 Hz stimuli but are significant for both the auditory nerve and collicular components when a mid-frequency (2000 Hz) tone pip is used. During concentrated attention toward visual stimuli, irrelevant auditory stimuli may be attenuated at a peripheral level possibly through the action of the efferent olivocochlear bundle.