期刊论文

Effect of Weak Noise Forward Masking on the Frequency Tuning in Inferior Collicular Neurons

中文

听力学及言语疾病杂志

1006-7299

2005

13

5

333-336

10.3969/j.issn.1006-7299.2005.05.011

90208012:国家自然科学基金 30470564:国家自然科学基金

本校为第一机构

目的探讨在加入弱噪声前掩蔽的条件下,下丘神经元对声信号的频率调谐(frequency-tuning)的改变.方法 12只小鼠在自由声场条件下,选用相当于纯音听阈上5 dB强度不同时程(40、60、80、100 ms)的弱包络白噪声作为前掩蔽声,观察其对神经元频率调谐的影响.结果弱噪声前掩蔽使大部分神经元的频率调谐曲线(frequency tuning curve, FTC)锐化(P

Objective To study the change of frequency tuning in inferior collicular neurons when added weak noise forward masking. Methods We examined the changes in neuronal frequency tuning resulted from a weak white noise as forward masking relative to 5dB beyond minimum threshold （reMT＋ 5） and different duration （40,60,80,100 ms） under free field stimulation conditions. Results Weak noise forward masking sharpens frequency tuning curves （FTCs） of most neurons （ P 〈 0.01, n = 25）. The effect increased with masker duration increasing （ P 〈 0...