Timing during transitions in Bengalese finch song: implications for motor sequencing.
Timing during transitions in Bengalese finch song: implications for motor sequencing.
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孟加拉雀鸣声转换期间的时间：对运动排序的影响。
DOI：
10.1152/jn.00296.2017
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发表时间：
2017
影响因子：
2.5
通讯作者：
Bouchard,KristoferE
中科院分区：
文献类型：
--
作者：
Troyer,ToddW;Brainard,MichaelS;Bouchard,KristoferE
为了研究动作排序的机制，我们研究了孟加拉雀歌声中音节的时序和顺序之间的关系。个人的歌曲包括组织成概率序列的声学上不同的音节：给定的音节可能过渡到几个不同的音节（发散点），并且几个不同的音节可以过渡到给定的音节（收敛点）。与以前的研究一致，我们发现，更可能的转换在分歧点发生较短的音节间间隙。对这种关系的一种直觉是，音节之间的选择反映了一个竞争性的分支过程，其中与一个音节的更强的联系导致更高的概率和更短的延迟过渡到该音节与竞争的替代品。然而，我们发现，竞争性比赛模型的模拟结果重叠的获胜时间分布的竞争结果，并未能复制强的负相关性之间的概率和差距持续时间在歌曲数据。歌曲结构的进一步调查发现，有一个共同的收敛点的过渡间隙持续时间之间的强正相关。这种过渡并不与一个共同的竞争过程相关，而是反映了一个共同的终止音节。在相反的间隙持续时间，过渡概率不相关的收敛点。总之，我们的数据表明，音节的选择发生在早期的差距，与间隙的时间主要取决于潜伏期音节启动。这可能是由于一个过程中，概率序列是第一次稳定，其次是一个缩短的潜伏期，以音节唱得更频繁。新&值得注意的孟加拉雀歌曲组成的概率序列的音节。以往的研究表明，音节间隔的时长与转换概率呈显著的负相关。我们在这里表明，负相关是不一致的，与以前的建议，在音节过渡的时间是由竞争的替代品之间的比赛。相反，这些数据表明，音节选择发生在早期的差距，与间隙的时间主要是由潜伏期音节启动。
To investigate mechanisms of action sequencing, we examined the relationship between timing and sequencing of syllables in Bengalese finch song. An individual’s song comprises acoustically distinct syllables organized into probabilistic sequences: a given syllable potentially can transition to several different syllables (divergence points), and several different syllables can transition to a given syllable (convergence points). In agreement with previous studies, we found that more probable transitions at divergence points occur with shorter intersyllable gaps. One intuition for this relationship is that selection between syllables reflects a competitive branching process, in which stronger links to one syllable lead to both higher probabilities and shorter latencies for transitions to that syllable vs. competing alternatives. However, we found that simulations of competitive race models result in overlapping winning-time distributions for competing outcomes and fail to replicate the strong negative correlation between probability and gap duration found in song data. Further investigation of song structure revealed strong positive correlation between gap durations for transitions that share a common convergent point. Such transitions are not related by a common competitive process, but instead reflect a common terminal syllable. In contrast to gap durations, transition probabilities were not correlated at convergence points. Together, our data suggest that syllable selection happens early during the gap, with gap timing determined chiefly by the latency to syllable initiation. This may result from a process in which probabilistic sequencing is first stabilized, followed by a shortening of the latency to syllables that are sung more often.NEW & NOTEWORTHYBengalese finch songs consist of probabilistic sequences of syllables. Previous studies revealed a strong negative correlation between transition probability and the duration of intersyllable gaps. We show here that the negative correlation is inconsistent with previous suggestions that timing at syllable transitions is governed by a race between competing alternatives. Rather, the data suggest that syllable selection happens early during the gap, with gap timing determined chiefly by the latency to syllable initiation.