Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Nan Road, Chengdu, Sichuan, P. R. China.
University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing, P. R. China.
Sci Rep. 2017 Aug 31;7(1):10128. doi: 10.1038/s41598-017-09870-2.
Vocal Communication plays a crucial role in survival and reproductive success in most amphibian species. Although amphibian communication sounds are often complex consisting of many temporal features, we know little about the biological significance of each temporal component. The present study examined the biological significance of notes of the male advertisement calls of the Emei music frog (Babina daunchina) using the optimized electroencephalogram (EEG) paradigm of mismatch negativity (MMN). Music frog calls generally contain four to six notes separated approximately by 150 millisecond intervals. A standard stimulus (white noise) and five deviant stimuli (five notes from one advertisement call) were played back to each subject while simultaneously recording multi-channel EEG signals. The results showed that the MMN amplitude for the first call note was significantly larger than for that of the others. Moreover, the MMN amplitudes evoked from the left forebrain and midbrain were typically larger than those from the right counterpart. These results are consistent with the ideas that the first call note conveys more information than the others for auditory recognition and that there is left-hemisphere dominance for processing information derived from conspecific calls in frogs.
在大多数两栖动物物种中，发声交流在生存和繁殖成功中起着至关重要的作用。虽然两栖动物的交流声音通常很复杂，包含许多时间特征，但我们对每个时间成分的生物学意义知之甚少。本研究使用错配负波（MMN）的优化脑电图（EEG）范式，检查了峨眉音乐蛙（Babina daunchina）雄蛙求偶叫声的音符的生物学意义。音乐蛙的叫声通常包含四个到六个音符，间隔约 150 毫秒。每个被试同时记录多通道 EEG 信号，播放标准刺激（白噪声）和五个偏差刺激（一个求偶叫声的五个音符）。结果表明，第一个叫声音符的 MMN 振幅明显大于其他音符。此外，左前脑和中脑诱发的 MMN 振幅通常大于右脑对应的 MMN 振幅。这些结果与以下观点一致，即第一个叫声音符比其他音符传达更多的听觉识别信息，并且在处理来自同类叫声的信息时，青蛙的左半球具有优势。
