人工耳蜗植入者和正常听力者对汉语声调的前注意加工

The Pre-attentive Processes of Chinese Tones Transmitted by Cochlear Implant Users and Normal Hearing Subjects

杨立军;曹克利;魏朝刚;

1:北京协和医学院中国医学科学院北京协和医院耳鼻喉科

摘要
目的应用事件相关电位(event related potentials,ERP),特别是失匹配负波(mismatch nagtive,MMN)为指标,对人工耳蜗植入者和正常对照组的汉语声调识别进行研究。方法刺激材料为汉语四声调字,采用oddball范式,组成三个不同刺激组合,记录14名人工耳蜗植入者和14名听力正常的受试者对声调信息加工的ERP和MMN。结果人工耳蜗植入者和正常人都能得到明显的ERP和MMN。人工耳蜗植入者MMN含有两个负波,分别在100和300ms左右出现;正常人MMN也含有两个负波,分别在150和300ms左右出现。人工耳蜗植入者的MMN1潜伏期明显提前,MMN2潜伏期提前但不如MMN1提前的程度大;人工耳蜗植入者对二、三、四三种声调加工的MMN第一、第二个负波的潜伏期、振幅差异无显著统计学意义,正常组也是如此。结论人工耳蜗植入者能够在前注意阶段对汉语声调进行加工,但与正常人相比有所差别。
关键词
事件相关电位;失匹配负波;汉语声调;前注意加工;人工耳蜗植入
基金项目(Foundation):
作者
杨立军;曹克利;魏朝刚;
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