刺激声强度对气导短纯音诱发的眼肌和颈肌前庭诱发肌源性电位的影响

发布时间：2018-04-14 22:07

本文选题：刺激声强度 + 前庭　；参考：《南方医科大学学报》2014年06期

【摘要】：目的了解刺激声强度差异对正常人气导短纯音诱发的眼肌前庭诱发肌源性电位(ocular vestibular-evoked myogenic potential,oVEMP)和颈肌前庭肌源性诱发电位(cervical vestibular-evoked myogenic potential,cVEMP)的影响。方法选择国人正常人35例作为研究对象,男16例,女19例,年龄4~40岁(20.80±8.89),以500Hz tone brust为刺激音,按照100、95、90、85、80、75 dB nHL依次进行气导oVEMP和cVEMP检测,计算VEMP在不同刺激声强度的引出率、nI潜伏期、pI潜伏期、nI-pI波间期、振幅值和AR值,进行波形参数计算和声强度组间对比。结果全组正常人oVEMP和cVEMP的阈值分别为86.5±4.37 dB nHL、83.57±4.52 dB nHL。随着刺激声强度的减弱,无论oVEMP还是cVEMP,均表现出引出率下降、振幅减低等特点。在刺激声强度为100 dB nHL和95 dB nHL时,oVEMP和cVEMP的引出率均为100%,两者之间图形参数差异并不显著。结论随着刺激声强度的减弱,oVEMP和cVEMP出现引出率下降、振幅减低的趋势。对于40岁以下的国人人群,建议采用95 dB nHL作为VEMPs测试的最大起始刺激强度。
[Abstract]:Objective to investigate the effects of different stimuli on myogenic vestibular-evoked myogenic potentialVEMPP and cervical vestibular vestibular-evoked myogenic potentialcVEMPs in normal subjects.Methods A total of 35 normal Chinese subjects, 16 males and 19 females, aged 440 years, were selected as subjects. 500Hz tone brust was used as stimulus sound. The results were measured by air-conduction oVEMP and cVEMP in turn according to 100,959 ~ 90 nHL and 858075 dB nHL.The wave interval, amplitude and AR value of VEMP in different stimulation intensity were calculated. The wave parameters were calculated and compared with those of sound intensity group.Results the thresholds of oVEMP and cVEMP were 86.5 卤4.37 dB nHLN and 83.57 卤4.52 dB nHL, respectively.With the decrease of stimulus sound intensity, both oVEMP and CVEMPs show the characteristics of lower extraction rate and lower amplitude.When the stimulus intensity is 100dB nHL and 95 dB nHL, the extraction rate of cVEMP and OVEMP are both 100dB, but there is no significant difference between them.Conclusion with the decrease of sound intensity, the extraction rate and amplitude of OVEMP and cVEMP decrease.For Chinese under 40 years old, 95 dB nHL is recommended as the maximum initial stimulus intensity for VEMPs test.
【作者单位】：西安交通大学医学院第二附属医院耳鼻咽喉头颈外科;西安交通大学医学院第二附属医院耳病研究所;西安市第四医院耳鼻咽喉科;
【基金】：国家自然科学基金(3013300/C170703) 科技部“十一五”科技支撑计划项目(2007BAI18B13) 中央高校基本科研业务费专项资金(2012jdhz13) 陕西省国际科技合作重点项目(2013KW-28) 西安市科技攻关项目(SF1315(1)) 西安交通大学医学院第二附属医院新技术新疗法基金(2011015)~~
【分类号】：R764

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