Effects of forward masking on the responses of the inferior collicular neurons in the big brown bats, Eptesicus fuscus  

作　　者：LUANRuihong WUFeijian P.H.S.Jen SUNXinde 

机构地区：[1]CollegeofLifeSciences,EastChinaNormalUniversity,Shanghai200062,China [2]CollegeofLifeSciences,CentralChinaNormalUniversity,Wuhan430079,China [3]DivisionofBiologicalSciences,UMC,MO65211,USA

出　　处：《Chinese Science Bulletin》2003年第16期1748-1752,共5页

基　　金：supported by the National Natural Science Foundation of China(Grant No.30170313);the Ph.D.Education Fund of China(Grant No.2000026905)and the NSF of USA.`

摘　　要：The present study explores the forward mask-ing of the two-tone stimuli in sequence that evoked responses in the inferior colliculus (IC) of the echolocating bats. The results indicate that forward masking is obvious in the acoustic responses of the IC neurons to the two-tone stimuli. Meanwhile the intensity sensitivity of the neurons respond-ing to the probe increases with the inter-tone interval de-creasing. The effects of forward masking are correlated with the relative intensity and the interval between the masker and probe. That is, the effects of forward masking are re-duced with the masker intensity decreasing and enhanced with the probe intensity decreasing and the inter-tone inter-val shortened. The present study suggests that there is a cor-relation between the characteristics of the response to the probe and the dynamic conditions of the postsynaptic cur-rents in the IC neurons.The present study explores the forward mask-ing of the two-tone stimuli in sequence that evoked responses in the inferior colliculus (IC) of the echolocating bats. The results indicate that forward masking is obvious in the acoustic responses of the IC neurons to the two-tone stimuli. Meanwhile the intensity sensitivity of the neurons respond-ing to the probe increases with the inter-tone interval de-creasing. The effects of forward masking are correlated with the relative intensity and the interval between the masker and probe. That is, the effects of forward masking are re-duced with the masker intensity decreasing and enhanced with the probe intensity decreasing and the inter-tone inter-val shortened. The present study suggests that there is a cor-relation between the characteristics of the response to the probe and the dynamic conditions of the postsynaptic cur-rents in the IC neurons.

关 键 词：神经元 回音 声音间隔 声音探测器 前掩蔽 IC 回声定位 生理学 多突触传递 

分 类 号：R339.16[医药卫生—人体生理学]