听神经复合动作电位适应性的定量研究

A QUANTITATIVE STUDY OF THE ADAPTATION OF EIGHTH NERVE COMPOUND ACTION POTENTIAL

本文研究了短声串作为刺激时,听神经复合动作电位(CAP)中发生的掩蔽作用随短声串的各项参数变化的关系.结果表明:①双短声诱发的CAP中掩蔽作用随两个短声间距的增大而减小;②掩蔽声越强,或被掩蔽声越弱,掩蔽作用越明显.恢复所需的时间也越长;③掩蔽作用随掩蔽声个数的增多而增大,当个数增大到一定数目时,掩蔽作用趋于饱和.

In this paper we studied the relationship between the masking effects of eighth nerve compound action potential (CAP) and various stimulus parameters when the experiment animals were stimulated with click trains. The results showed; (1).The masking effect of the CAP evoked by a pair of clidks decreased with the increase of the inteval between the two clicks. (2). The louder the masker, or the weaker the maskee, the more obvious the masking effect, and the longer the time for recovery. (3). When the number of maskers (N) increased, the masking effect on the N + 1th response became more obvious. But when N was larger than a certain value, the masking effect would not strengthen further.