title: The role of the FM component in shaping the number of impulses and response latency of inferior collicular neurons of Hipposideros armiger elicited by CF-FM sounds.
abstract: Previous studies show that when stimulated with constant frequency-frequency modulated (CF-FM) sounds, the inferior collicular neurons of the leaf-nosed bat, Hipposideros armiger, either discharge impulses only to the CF component (single-on, SO neurons) or to both CF and FM components (double-on, DO neurons). In this study, we specifically determine the role of the FM component in shaping the number of impulses and response latency of these two types of neurons in response to CF-FM sounds. Adding the FM component to the CF sounds significantly decreases the number of impulses of both SO and DO neurons but shortens the response latency of DO neurons in response to the CF component of the CF-FM sounds. The possible neural mechanisms underlying these seemingly paradoxical observations are briefly discussed based on our preliminary intracellular recording studies. Biological relevance of these findings in relation to different phases of bats' hunting is also discussed.
authors.affiliation: School of Life sciences and Hubei Key Lab of Genetic Regulation and Integrative Biology, Central China Normal University, Wuhan, Hubei, China.
authors.forename: Zi-Ying
authors.initials: ZY
authors.lastname: Fu
authors.affiliation: School of Life sciences and Hubei Key Lab of Genetic Regulation and Integrative Biology, Central China Normal University, Wuhan, Hubei, China.
authors.forename: Na
authors.initials: N
authors.lastname: Xu
authors.affiliation: School of Life sciences and Hubei Key Lab of Genetic Regulation and Integrative Biology, Central China Normal University, Wuhan, Hubei, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Life sciences and Hubei Key Lab of Genetic Regulation and Integrative Biology, Central China Normal University, Wuhan, Hubei, China.
authors.forename: Jia
authors.initials: J
authors.lastname: Tang
authors.affiliation: College of Special Education, Bingzhou Medical College, Yantai, Shangdong, China; Department of Life Science, National Taiwan Normal University, Taipei, China; Division of Biological Sciences, University of Missouri-Columbia, Columbia, MO 65211, USA. Electronic address: jenp@missouri.edu.
authors.forename: Philip Hung-Sun
authors.initials: PH
authors.lastname: Jen
authors.affiliation: School of Life sciences and Hubei Key Lab of Genetic Regulation and Integrative Biology, Central China Normal University, Wuhan, Hubei, China. Electronic address: chenqc@mail.ccnu.edu.cn.
authors.forename: Qi-Cai
authors.initials: QC
authors.lastname: Chen
mesh_terms: D000161:Acoustic Stimulation; D000818:Animals; D002685:Chiroptera / Q000502:physiology*; D004455:Echolocation / Q000502:physiology; D007245:Inferior Colliculi / Q000166:cytology / Q000502:physiology*; D009474:Neurons / Q000502:physiology*; D011930:Reaction Time; D013016:Sound
keywords: Double-on neuron; Firing rates; Leaf-nosed bat; Response latency; Single-on neuron