Sound Classification and Call Discrimination Are Decoded in Order as Revealed by Event-Related Potential Components in Frogs
Sound Classification and Call Discrimination Are Decoded in Order as Revealed by Event-Related Potential Components in Frogs
复制标题
声音分类和叫声辨别按照青蛙事件相关电位成分所揭示的顺序进行解码
DOI：
10.1159/000441215
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发表时间：
2015-01-01
影响因子：
1.7
通讯作者：
Tang, Yezhong
中科院分区：
文献类型：
--
作者：
Fang, Guangzhan;Yang, Ping;Tang, Yezhong
使用交流声音来协调社会和生殖行为的物种必须能够区分发声和非发声的声音，以及识别个人发声类型。在这项研究中，我们试图确定所涉及的过程和时间顺序，它们发生在一个无尾目物种，音乐蛙Babina daunchina的神经本地化。要做到这一点，我们测量了端脑和中脑事件相关电位（ERP）引起的合成白色噪音（WN），高性吸引力（HSA）的男性从巢内和男性呼叫低性吸引力（LSA）巢外产生的电话。每个刺激具有相似的时间结构。结果表明：（1）WN和同种叫声之间在~ 100 ms时的第一负ERP成分（N1）的振幅有显著差异，而HSA和LSA叫声之间无显著差异，表明同种叫声和非发声声音之间的辨别发生在~ 100 ms，（2）在右侧端脑，HSA和WN的差异波中~ 200 ms的第二正ERP成分（P2）的振幅显著高于LSA和WN的差异波，（3）WN在~ 300 ms时诱发的第三正ERP成分（P3）大于同种叫声，表明蛙已将同种叫声归为一类，并认为WN是新的。因此，声音的检测和呼叫特征的识别都以特定的时间顺序快速完成，如ERP组件所反映的。此外，最动态的ERP模式出现在左侧中脑和右侧端脑，表明这两个脑区可能在无尾类动物的声音交流中起着关键作用。
Species that use communication sounds to coordinate social and reproductive behavior must be able to distinguish vocalizations from nonvocal sounds as well as to identify individual vocalization types. In this study we sought to identify the neural localization of the processes involved and the temporal order in which they occur in an anuran species, the music frog Babina daunchina. To do this we measured telencephalic and mesencephalic event-related potentials (ERPs) elicited by synthesized white noise (WN), highly sexually attractive (HSA) calls produced by males from inside nests and male calls of low sexual attractiveness (LSA) produced outside of nests. Each stimulus possessed similar temporal structures. The results showed the following: (1) the amplitudes of the first negative ERP component (N1) at ∼100 ms differed significantly between WN and conspecific calls but not between HSA and LSA calls, indicating that discrimination between conspecific calls and nonvocal sounds occurs in ∼100 ms, (2) the amplitudes of the second positive ERP component (P2) at ∼200 ms in the difference waves between HSA calls and WN were significantly higher than between LSA calls and WN in the right telencephalon, implying that call characteristic identification occurs in ∼200 ms and (3) WN evoked a larger third positive ERP component (P3) at ∼300 ms than conspecific calls, suggesting the frogs had classified the conspecific calls into one category and perceived WN as novel. Thus, both the detection of sounds and the identification of call characteristics are accomplished quickly in a specific temporal order, as reflected by ERP components. In addition, the most dynamic ERP patterns appeared in the left mesencephalon and the right telencephalon, indicating the two brain regions might play key roles in anuran vocal communication.