Tracheal length changes during zebra finch song and their possible role in upper vocal tract filtering
Tracheal length changes during zebra finch song and their possible role in upper vocal tract filtering
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DOI：
10.1002/neu.10332
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发表时间：
2004-06-01
期刊：
影响因子：
--
通讯作者：
Goller, F
中科院分区：
文献类型：
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作者：
Daley, M;Goller, F
在鸟类发声器官中产生的声音可以通过上声道的过滤特性来改变。主动控制过滤器特性的可能机制包括喙、舌头和喉部的运动以及气管长度的调整。我们研究了斑马雀(Taeniopygia Guttata)在歌唱过程中，气管长度的变化是否可能是调节上声道过滤器特性的一个可能机制。在基底端用声学显微镜监测气管长度，并记录空洞下气囊压力和声输出。气管缩短发生在歌唱开始时，在每个主题中，气管长度在呼气压力脉冲期间减少，在短时间吸气时增加。双侧气管空洞神经切断证实，歌曲比赛开始时的初始缩短是气管的主动缩短(即，由空洞肌肉活动介导)。长度的调节不受去神经支配的影响，很可能是由锁骨间气囊的加压所驱动的。主题期间的绝对长度变化很小(
Sounds produced in the avian vocal organ may be modified by filter properties of the upper vocal tract. Possible mechanisms to actively control filter characteristics include movements of the beak, tongue, and larynx and adjustments of tracheal length. We investigated whether length changes of the trachea are a likely mechanism for adjusting upper vocal tract filter properties during song in the zebra finch (Taeniopygia guttata). Tracheal length was monitored at the basal end using sonomicrometry and was recorded together with subsyringeal air sac pressure and acoustic output. Tracheal shortening occurred at the onset of song bouts, and during each motif the tracheal length decreased during expiratory pressure pulses and increased during the short inspirations. A bilateral tracheal syringeal nerve cut confirmed that the initial shortening at the onset of the song bout is an active shortening of the trachea (i.e., mediated by syringeal muscle activity). The modulation of length during the motif was not affected by the denervation and is most likely driven by the pressurization of the interclavicular air sac. The absolute length change during the motif was small (