Abstract： To study the effects of forward masker sound with different durations on neuronal firing and rate-intensity function (RIF) of mouse inferior colliculus (IC) neurons, a tone relative to 5 dB above minimum threshold (re MT+5 dB) at the best frequency of recorded neurons was used as forward masker sound under free field stimulation conditions. The masker durations were 40, 60, 80, 100 ms. The results showed that as masker duration increasing, inhibition in neuronal firing was enhanced (P<0.000 1, n=41) and the latency of neurons was lengthened (P<0.01, n=41). In addition, among 41 inhibited IC neurons, the dynamic range (DR) of the most majority (90.2%, 37/41) narrowed with masker sound duration increasing (P<0.000 1), whereas the DR of others (9.8%, 4/41) became wider. These data suggest that the masking effects of forward masker sound with different durations might be correlated with the amplitude and duration of inhibitory input to IC neurons elicited by masker sound.
收稿日期: 2005-02-25
引用本文:
梅慧娴,郭玉萍,吴飞健,陈其才. 不同时程的前掩蔽声对小鼠下丘神经元声反应的掩蔽效应[J]. , 2005, 44(2): 0-0.
梅慧娴,郭玉萍,吴飞健,陈其才. Masking effect of forward masker sound with different durations on acoustical responses of mouse inferior collicular neurons to probe sound. , 2005, 44(2): 0-0.
