Generation of auditory brain stem responses (ABRs). II. Effects of surgical section of the trapezoid body on the ABR in guinea pigs and cat.
Generation of auditory brain stem responses (ABRs). II. Effects of surgical section of the trapezoid body on the ABR in guinea pigs and cat.
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DOI：
10.1016/0013-4694(83)90260-2
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发表时间：
1983-10
期刊：
影响因子：
--
通讯作者：
Shin-Ichi Wada;A. Starr
中科院分区：
文献类型：
--
作者：
Shin-Ichi Wada;A. Starr
在豚鼠和猫的颅骨和非头侧参考电极之间记录了腹侧入路斜方体中线切片前后的听觉脑干电位。全断后ABR改变：N2延迟，P3、N3丢失，P4、N4潜伏期缩短，仅N4波幅减弱。斜方体部分切断时，P3波幅与切断范围呈线性关系。记录从表面的斜方体之前和之后的部分显示的损失的活动对侧的耳朵刺激和保存的活动同侧的部分。双耳的相互作用在P4和N4的梯形体部分的程度的函数以线性方式衰减。这项研究表明，斜方体中线对侧的听觉脑干结构产生成分N2、P3、N3、N4，而中线同侧的听觉结构产生成分P1、N1、P2和P4。
Auditory brain stem potentials were recorded between the skull and a non-cephalic reference electrode in guinea pig and cat before and after midline section of the trapezoid body from a ventral approach. The ABR after complete section was altered: N2 was delayed, P3 and N3 were lost, P4 and N4 were shortened in latency but only N4 was attenuated in amplitude. With partial section of the trapezoid body the amplitude of P3 was linearly related to the extent of the section. Recordings from the surface of the trapezoid body before and after section revealed a loss of activity contralateral to the ear stimulated and a preservation of activity ipsilateral to the section. Binaural interaction in P4 and N4 was attenuated in a linear manner as a function of the extent of trapezoid body section. This study suggests that auditory brain stem structures contralateral to the midline of the trapezoid body generate components N2, P3, N3, N4, whereas auditory structures ipsilateral to the midline generate components P1, N1, P2 and P4.