Species differences in auditory processing dynamics in songbird auditory telencephalon
Species differences in auditory processing dynamics in songbird auditory telencephalon
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DOI：
10.1002/dneu.20524
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发表时间：
2007-09-15
影响因子：
3
通讯作者：
Vicario, David S.
中科院分区：
文献类型：
--
作者：
Terleph, Thomas A.;Mello, Claudio V.;Vicario, David S.
鸣禽的尾内侧巢皮层（NCM）是一个端脑区域，参与复杂的声音通信信号的听觉处理和记忆。我们使用纯音刺激和多单位电生理记录清醒的鸟类，以调查是否在NCM的歌曲响应电路的基本属性不同的金丝雀和斑胸草雀，两个物种的歌曲是显着不同的光谱和时间组织。我们发现，在斑胸草雀NCM的反应的特点是广泛的调谐和持续的反应，可能有利于整合斑胸草雀的歌曲音节和呼叫注意到，是持续时间长，有一个广泛的谐波结构。相比之下，我们发现，在金丝雀NCM的反应显示较窄的调谐和持续的反应在分析的时间段。这些特点可能有助于增强处理的窄带哨声，快速颤音，陡峭的频率调制是金丝雀歌曲的突出特点。这些物种的差异是不太明显的领域L2，直接thalamorecipient区域，代表了在中央鸟类听觉通路的前一站。NCM的反应没有不同的性别的任何一个物种，但字段L2没有显示更广泛的调整在斑胸草雀女性相对于男性。总之，物种的NCM响应特性的差异可能反映了每个物种的声乐曲目的声学元素的选择性。(c)2007 Wiley Periodicals，Inc.开发神经生物学。
The caudomedial nidopallium (NCM) of songbirds is a telencephalic area involved in the auditory processing and memorization of complex vocal communication signals. We used pure tone stimuli and multiunit electrophysiological recordings in awake birds to investigate whether the basic properties of song-responding circuits in NCM differ between canaries and zebra finches, two species whose songs are markedly different in their spectral and temporal organization. We found that the responses in zebra finch NCM are characterized by broad tuning and sustained responses that may facilitate the integration of zebra finch song syllables and call notes that are of long duration and have a broad harmonic structure. In contrast, we found that the responses in canary NCM show narrower tuning and less sustained responses over the time periods analyzed. These characteristics may contribute to enhanced processing of the narrow-band whistles, rapid trills, and steep frequency modulations that are prominent features of canary song. These species differences are much less pronounced in field L2, the direct thalamorecipient region that represents a preceding station in the central avian auditory pathway. NCM responses did not differ across sexes of either species, but field L2 did show wider tuning in zebra finch females relative to males. In sum, species differences in the response properties of NCM likely reflect selectivity for the acoustic elements of each species' vocal repertoire. (c) 2007 Wiley Periodicals, Inc. Develop Neurobiol.