听外周偏侧性的病理发现

Pathological Findings of Peripheral Auditory Lateralization

徐进;刘鋋;廉能静;陈秀伍

1:北京医院耳鼻咽喉科

2:北京市耳鼻咽喉科研究所

3:北京市耳鼻咽喉科研究所

4:北京市耳鼻咽喉科研究所 北京 100730

摘要
目的 观察生理和蜗后病理条件下听觉外周系统的偏侧性,以加深对双侧对称性疾病的认识。方法 检测65例听神经病患者和的例正常健康青年纯音测听、自发性耳声发射(SOAE)、瞬态诱发性耳声发射(TEOAN)及其对侧抑制效应,从耳蜗和传出神经两个水平分析左右听活动。结果①听神经病患者右耳各频率平均纯音听阈约高于左耳5dB;②正常组TEOAE幅值右耳大于左耳(P<0.01),听神经病患者组TEOAE幅值右耳大于左耳(P<0.05);③正常组传出抑制功能右耳大于左耳(P<0.01),听神经病患者组传出抑制功能左、右耳均有障碍,右耳略重于左耳,但无统计学差异(P>0.05);④无论是正常组还是听神经病患者组均在右耳较易记录到SOAE;⑤正常组SOAE强弱左右耳间无统计学差异(P>0.05;听神经病患者组SOAE右耳强于左耳(P<0.01)。结论 听觉外周系统具有偏侧性(右侧优于左侧);在同一蜗后病理条件下,听活动较强的一侧病理损害则较重,听活动较弱的一侧病理损害则较轻;听神经病患者右耳听力损失稍重于左耳,可能来源于听外周系统本身的固有属性。
关键词
听觉外周系统;听神经病;听非对称性;耳声发射;传出抑制
基金项目(Foundation):
作者
徐进;刘鋋;廉能静;陈秀伍
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