The role of nonlinear dynamics of the syrinx in the vocalizations of a songbird
The role of nonlinear dynamics of the syrinx in the vocalizations of a songbird
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DOI：
10.1038/25725
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发表时间：
1998-09-03
期刊：
影响因子：
64.8
通讯作者：
Mitra, PP
中科院分区：
文献类型：
--
作者：
Fee, MS;Shraiman, B;Mitra, PP
鸟鸣的特点是在很宽的时间尺度范围内调制声音特性。理解大脑组织这种复杂的时间行为的机制是研究歌曲控制和学习系统的核心动机（2-8）。在这里，我们提出的证据表明，除了中枢神经控制外，鸟类发声器官固有的非线性振荡动力学还提供了更深层次的时间组织。对斑胸草雀（Taeniopygia guttata）鸣声的详细时间和频谱检查揭示了一类快速鸣声调制，这些调制与鸣管动态状态的转换一致。此外，体外实验表明，随着呼吸或注射器参数的缓慢变化，注射器可以产生一系列频谱和时间复杂的振荡状态。因此，少量神经信号的简单变化可以导致复杂的声学序列。
Birdsong is characterized by the modulation of sound properties over a wide range of timescales'. Understanding the mechanisms by which the brain organizes this complex temporal behaviour is a central motivation in the study of the song control and learning system(2-8). Here we present evidence that, in addition to central neural control, a further level of temporal organization is provided by nonlinear oscillatory dynamics that are intrinsic to the avian vocal organ. A detailed temporal and spectral examination of song of the zebra finch (Taeniopygia guttata) reveals a class of rapid song modulations that are consistent with transitions in the dynamical state of the syrinx. Furthermore, in vitro experiments show that the syrinx can produce a sequence of oscillatory states that are both spectrally and temporally complex in response to the slow variation of respiratory or syringeal parameters. As a consequence, simple variations in a small number of neural signals can result in a complex acoustic sequence.