有关猫交叉听力及其对检测耳影响的初步研究  

THE PRELIMINARY STUDY OF CROSS HEARING AND ITS EFFECTS OF CHECKED EAR IN CAT

作　　者：安玉香[1] 汤浩[2] 

机构地区：[1]沈阳医学院病理生理教研室,辽宁沈阳110031 [2]中国医科大学听觉研究室,辽宁沈阳110001

出　　处：《中国应用生理学杂志》2001年第3期289-292,共4页Chinese Journal of Applied Physiology

摘　　要：目的 :研究猫的交叉听力现象及其产生机理 ,初步探讨交叉听力对检测耳ABR振幅的影响。方法 :用彻底破坏一侧耳蜗的方法 ,观察 16只听力正常家猫的交叉听力现象及其对检测耳的影响。结果 :①当短声强度≥ 75dB(SPL)时 ,开始出现交叉听力波形 ,声强增至 95dB时 ,交叉听力波形最典型。② 95dB短声产生的交叉听力波形可被 40或 45dB (SPL)的稳态白噪声 (SWN)完全屏蔽掉。③在同一时间轴中比较 95dB短声诱发的ABR和交叉听力波形 ,发现交叉听力之波谷恰与ABR之pⅢ 、pⅣ 波峰相对应。④两耳均正常时对侧耳负荷的 40dBSWN可使 95dB短声诱发的ABR之pⅢ 、pⅣ 波振幅增大 ,且具统计学意义 (P <0 .0 1)。结论 :交叉听力对ABR振幅的影响取决于两者的波峰与波谷在同一时间轴上的对应情况 ,声强较大时记录到的ABR 。Aim:To study the cross hearing and its mechanism of cat,so that preliminary explore the effects to checked ear on the amplitudes of ABR. Methods:with the method utterly damaged the cochlea. We observed the cross hearing and its effects on checked ear of the 16 normal cats. Results:①The cross hearing began to appear when the intensity of click≥75 dB( SPL),if the intensity of click was increased to 95 dB,the cross hearing become the most obvious.②This cross hearing could be completely masked by 40 or 45 dB( SPL) steady white noise(SWN).③Make a comparison of two waves on the same time shaft indicates that the trough of cross hearing wave and the crest of p Ⅲ?p Ⅳ wave by 95 dB click are corresponding.④To observe the alteration of amplitude of ABR evoked by 95 dB click when load 40 dB SWN on the contralateral ear under the circumstance of the both ears are normal,we discovered that the 40 dB SWN can increase the amplitude of the wave p Ⅲ?p Ⅳ ( P <0.01). Conclusion:The experiment results demonstrate that the effect of cross hearing to the amplitude of ABR on the checked ear depend on the corresponding situation of the wave crest and trough of both cross hearing and ABR on the same time shaft. In fact ,the ABR evoked by high intensity of click is a synthetic potential by cross hearing and appeared on the stimulated ear.

关 键 词：交叉听力 听觉脑干电反应 稳态白噪声 

分 类 号：R764.04[医药卫生—耳鼻咽喉科] Q437[医药卫生—临床医学]