交叉听力对豚鼠听性脑干反应测试的影响

报告对８只听觉正常的及鼠，观察交叉听力对其耳蜗动作电位和听怀脑干反应测试结果的影响。先手术造成其左耳全聋，然后用四种方法分别记录ＡＢＲ反应阈和Ⅰ波潜伏期。结果发现，术耳虽已全聋，但该侧给声强度达１０ｄＢＨＬ以上时仍可记录到ＡＢＲ，而ＡＰ未能引出，代之出现的却是清晰的ＡＢＲ波形。

The effect of cross-hearing on auditory brain-stem response of guinea pigs

Cross-hearing is a common phenomenon in clinical audiometry,However ,its affection on ABR of guinea pigs was not reported previously. In this paper,eight guinea pigs with normal hearing(ABR 10dB HL) were selected to test ABR and action potential(AP). At first,the left ears of the detected animals were destroyed by surgery under anaesthesia,and then recorded their evoked potentials by four methods. The results of animal experiment suggested that ABR of guinea pigs was influenced severely by cross-hearing if the stimulated sound was delivered to an external ear canal of guinea pig through the earphone when hearing of its opposite ear existed. On the other hand ,AP of guinea pigs was not impacted by cross-hearing at all. Therefore,cross-hearing must be considered while ABR is as an indicator in the animal experiment. Some reasons were also discussed.