Effects of forward masking on the responses of the inferior collicular neurons in the big brown bats, Eptesicus fuscus
LUAN Ruihong1, WU Feijian2, P. H. S. Jen3 & SUN Xinde1 1. College of Life Sciences, East China Normal University, Shanghai 200062, China; 2. College of Life Sciences, Central China Normal University, Wuhan 430079, China; 3. Division of Biological Sciences, UMC, MO 65211, USA Correspondence should be addressed to Sun Xinde (e-mail: sunxinde@ hotmail.com)
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.
【CateGory Index】： Q437