THE EFFECT OF LOW FREQUENCY SOUND ON POSTURAL STABILITY IN PATIENTS WITH VERTIGO CAUSED BY INNER EAR DYSFUNCTION.

低频声音对内耳功能障碍引起的眩晕患者姿势稳定性的影响。

基本信息

批准号：
03670809
负责人：
MINETA Hiroyuki
金额：
$ 0.13万
依托单位：
HAMAMATSU UNIVERSITY SCHOOL OF MEDICINE
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

The effect of low frequency sound on postural stability was studied in patients with different type inner ear pathology. The low frequency sound level ranged from 130 to 132 dB and were delivered at the frequencies 4,8,16,25,50,63Hz. The postural response were measured with a force platform and the sway velocity of the center point of force was determined. In the healthy subjects, the low frequency sound stimulation did not increase body sway velocity. The subjects showed slight improvement of their postural stability during the stimulation period, probably due to alerting response generated by the low frequency sound stimulation. The mean responses of patients with Meniere's disease, with chronic otitis media with vertigo and with vertigo of peripheral origin showed increased body sway during stimulation. In the individual response 26% of the patients with Meniere's disease, 40% with chronic otitis media with vertigo, 26% with vertigo of peripheral origin experienced significant postural instability during the stimulation of low frequency sound. All patients with perilymphatic fistula showed significantly altered postural stability during low frequency stimulation. The result demonstrate that in subjects with different types inner ear disease the vestibular system starts to respond to low frequency sound. The activation of vestibulospinal responses by low frequency sound seems to be an expression the Tullio phenomenon. A long term effect on smoking on postural stability was examined on 80 subjects randomly selected from a population of professional forest workers. Age and smoking had significant simple correlation coefficients to sway velocity but hours of exposure to noise did not. The mean sway velocity increased with increase the dose of smoking. Smokers exhibited more unstable posturographic results than non-smokers. Smoking was suggested to have long term effect on the postural control system.

研究了低频声音对不同类型内耳病理患者的姿势稳定性的影响。低频声级范围为 130 至 132 dB，频率为 4、8、16、25、50、63Hz。用测力平台测量姿势反应，并确定力中心点的摇摆速度。在健康受试者中，低频声音刺激不会增加身体摇摆速度。受试者在刺激期间的姿势稳定性略有改善，这可能是由于低频声音刺激产生的警报反应。梅尼埃病、伴有眩晕的慢性中耳炎和外周源性眩晕患者的平均反应显示，刺激期间身体摇摆增加。在个体反应中，26%的梅尼埃病患者、40%的慢性中耳炎伴眩晕患者、26%的外周性眩晕患者在低频声音刺激期间出现明显的姿势不稳定。所有外淋巴瘘患者在低频刺激期间均表现出明显的姿势稳定性改变。结果表明，在患有不同类型内耳疾病的受试者中，前庭系统开始对低频声音做出反应。低频声音激活前庭脊髓反应似乎是图利奥现象的一种表现。研究人员对从专业林业工人中随机选出的 80 名受试者进行了研究，研究了吸烟对姿势稳定性的长期影响。年龄和吸烟对影响速度有显着的简单相关系数，但暴露在噪音中的时间却没有。平均摇摆速度随着吸烟剂量的增加而增加。吸烟者比不吸烟者表现出更不稳定的姿势测量结果。有人认为吸烟会对姿势控制系统产生长期影响。