摘要
目的探讨Blackman包络短音不同时程与ABR波形和潜伏期的关系。方法采用Blackman包络的短音诱导豚鼠ABR,在0.5kHz,其刺激时程分别为2、3、4、5ms,在1、2、4、8kHz,其刺激时程分别为1、2、3、4、5ms。结果随刺激音时程延长,刺激音频率特异性越好,但ABR波形分化逐渐变差,且波Ⅲ潜伏期随刺激时程的延长而延长。0.5kHz在4ms,1、2、4、8kHz在2ms或3ms诱导的ABR波形分化好。结论用短音诱导频率特异性ABR时,应优化刺激声条件,以取得刺激声的频率特异性和瞬态性的统一。
Objective To explore the relationship between the duration of tone pip with Blackman envelop and morphology or latency of auditory brainstem responses. Methods ABRs were recorded using 0.5,1,2,4 and 8 kHz tone pips with Blackman envelope at different intervals. Results The longer the duration of stimulus was, the better the frequency specificity of stimulus was. However, the ABR morphology were affected and the lateneies of wave Ⅲwere prolonged. Conclusion When using tone pips to evokes ABR, stimuli should be well considered in order to produce better frequency specificity and transient state.
出处
《听力学及言语疾病杂志》
CAS
CSCD
北大核心
2010年第3期253-256,共4页
Journal of Audiology and Speech Pathology
基金
国家自然科学基金资助项目(30872858)
关键词
短音
时程
听性脑干反应
Tone pip
Duration
Auditory brainstem response
