纯音听阈正常的言语交流障碍患者听觉事件相关电位分析

Characteristics of Auditory Evoked Event-Related Potentials in Patients of Auditory Disability with Normal Hearing

梁茂金;郑亿庆;杨海弟;张志刚;陈俊明;

1:中山大学逸仙纪念医院耳鼻喉科

2:中山大学听力与言语疾病研究所

摘要
目的初步探讨纯音听阈正常的言语交流障碍患者听觉事件相关电位的特征。方法因听觉障碍尤其在噪声环境下言语理解困难的患者10例作为患者组,正常对照组为性别、年龄匹配的无听力及交流障碍的健康志愿者20例,所有患者及志愿者纯音听阈、鼓室导抗图、畸变耳声发射(DPOAE)及听性脑干反应(ABR)检测均无异常。两组分别在安静和噪声背景下行128导联言语刺激音的听觉事件相关电位(event-related potentials,ERP)检测,比较两组的ERP成分P1-N1-P2和失匹配负波(mismatch negativity,MMN)的潜伏期和波幅。结果安静背景下,两组均能诱出P1-N1-P2和MMN,患者组MMN潜伏期为221.8±23.9 ms,较正常对照组(200.4±28.1 ms)延长(P<0.05);噪声背景下,2名患者的P1-N1-P2及MMN不能分辨;患者组及对照组的MMN潜伏期分别为267.1±27.8和233.4±25.8 ms,差异有显著统计学意义(P<0.01);在安静及噪声背景下,P1-N1-P2潜伏期及波幅、MMN的波幅两组比较差异均无统计学意义(P>0.05)。结论纯音听阈正常的言语交流障碍患者MMN的潜伏期明显延长,提示其中枢处理能力可能下降。
关键词
言语交流障碍;事件相关电位分析;P1-N1-P2;失匹配负波
基金项目(Foundation):
作者
梁茂金;郑亿庆;杨海弟;张志刚;陈俊明;
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