耳聋发病年龄对人类电听觉双耳敏感性的影响。
Effect of age at onset of deafness on binaural sensitivity in electric hearing in humans.
机构信息
University of Wisconsin Waisman Center, 1500 Highland Avenue, Madison, Wisconsin 53705, USA.
出版信息
J Acoust Soc Am. 2010 Jan;127(1):400-14. doi: 10.1121/1.3257546.
Sensitivity to binaural cues was studied in 11 bilateral cochlear implant users, all of whom received both of their cochlear implants as adults, but who varied in the age at onset of deafness, from pre-lingual to childhood-onset to adult-onset. Sensitivity to interaural timing difference (ITD) and interaural level difference (ILD) cues was measured at basal, middle, and apical pitch-matched places of stimulation along the cochlear arrays, using a stimulation rate of 100 Hz. Results show that there is a trend for people whose onset of deafness occurred during adult life or late childhood to retain at least some sensitivity to ITDs, whereas people with onset of deafness earlier in life were insensitive to ITDs. In contrast, ILD cue sensitivity was present in all subjects. There were no effects of place of stimulation on binaural sensitivity, suggesting that there is no indication of a dependence of ITD sensitivity on apical vs basal electrode location.
研究了 11 名双侧人工耳蜗植入者对双耳线索的敏感性，他们都在成年后接受了人工耳蜗植入，但耳聋的发病年龄不同，从语前聋到儿童期聋到成年期聋不等。使用 100Hz 的刺激率，在耳蜗数组的基础、中间和顶端的音调匹配刺激位置测量了对声间时间差（ITD）和声间水平差（ILD）线索的敏感性。结果表明，耳聋发病年龄在成年或晚期儿童期的人有保留至少对 ITD 有一定敏感性的趋势，而发病年龄更早的人对 ITD 不敏感。相比之下，ILD 线索敏感性存在于所有受试者中。刺激部位对双耳敏感性没有影响，这表明没有迹象表明 ITD 敏感性依赖于顶端与基础电极位置。
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