Narins P M, Capranica R R
Brain Behav Evol. 1980;17(1):48-66. doi: 10.1159/000121790.
Male Puerto Rican treefrogs, Eleutherodactylus coqui, produce a two-note call: a 100-msec constant frequency 'Co' note, followed by a longer, upward sweeping 'Qui' note. Previous behavioral studies have shown that males respond selectively to natural and synthetic call notes of 100 msec duration, whereas preliminary results suggest that females respond preferentially to the second note in the male's call. In the present study, we first show that the basilar papilla in the inner ear is tuned differentially in males and females. Comparisons were next made between cells in the eighth nerve and midbrain torus semicircularis of firing rate vs. duration functions in order to help determine the underlying neural mechanisms responsible for the behavioral selectivity to notes of 100 msec duration. A model for detection of vocalizations of specific durations is postulated and discussed in the light of the observed calling behavior of the male as well as the response properties of a class of cells found in the torus semicircularis.
雄性波多黎各雨蛙（Coqui雨蛙，即寇奎伊氏姬蛙）发出一种双音叫声：先是一个持续100毫秒的恒定频率的“Co”音，接着是一个更长的、向上扫频的“Qui”音。先前的行为学研究表明，雄性对持续100毫秒的自然和合成叫声有选择性反应，而初步结果表明，雌性对雄性叫声中的第二个音有优先反应。在本研究中，我们首先表明，内耳中的基底乳头在雄性和雌性中具有不同的调谐。接下来，对听神经和中脑半规管中的细胞进行了比较，分析其放电率与持续时间的函数关系，以帮助确定对持续100毫秒的声音产生行为选择性的潜在神经机制。根据观察到的雄性叫声行为以及在半规管中发现的一类细胞的反应特性，提出并讨论了一个检测特定持续时间发声的模型。
