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首页> 外文期刊>Zoological Science >Neural function of the mesencephalic dorsomedial nucleus (DM) on distance call production in Bengalese finches
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Neural function of the mesencephalic dorsomedial nucleus (DM) on distance call production in Bengalese finches

机译：孟加拉雀科中脑背顶核（DM）对远距离呼叫产生的神经功能

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摘要

In sexually mature Bengalese finches, acoustic structures of distance calls show sexual difference. The dorsomedial nucleus (DM) of intercollicular complex is known as the midbrain vocal center of distance calls. Neural input from the robust nucleus of archistriatum (RA) was observed in the DM of sexually mature males, but not observed in that of sexually mature females. The purpose of this study is to clarify some more details of physiological function of the neural system in the DM in distance call production. Electrical stimulation to the DM of both sexes induced a call acoustically similar to distance calls, whose duration depended on the number of the pulses/train of electrical stimulation; electrical stimulation in relatively large (or small) numbers of pulses/train induced calls with relatively long (or short) duration, respectively. Multi-unit spikes were recorded from neurons in the DM. The increment of the frequency of recorded spikes was large when the bird vocalized distance calls, and the number of the frequency decreased when the bird vocalized calls whose duration was shorter than that of distance calls. These results suggest that the neural system in the DM controls duration of distance calls in sexually mature males and females. Electrical stimulation to the DM under different pulse frequencies induced calls with different patterns of time-frequency characteristics. The relation between the pulse frequencies and time-frequency characteristics showed sexual difference. The relation between them in RA-lesioned males was similar to that in females. These results suggest that the neural circuit in the DM of sexually mature males is consisted of sexually common neural circuit controlled by the neural input from the RA, and that these sexually different neural system produce sexually different acoustic structures of distance calls.
机译：在性成熟的孟加拉雀科中，远距离通话的声音结构显示出性别差异。关节间复合体的背核（DM）被称为远距离通话的中脑声音中心。在性成熟男性的DM中观察到了来自原虫坚固核（RA）的神经输入，但在性成熟女性的DM中未观察到。这项研究的目的是阐明远程呼叫产生中DM中神经系统的生理功能的更多细节。男女双方对DM的电刺激会在听觉上类似于远距离通话，其持续时间取决于脉冲数/电刺激序列。分别以相对较长（或较短）持续时间的相对较大（或较小）数量的脉冲/火车感应呼叫进行电刺激。从DM中的神经元中记录了多单位峰。鸟鸣叫远距离通话时，记录尖峰的频率增加很大，而鸟鸣叫持续时间短于远距离通话时，频率的数目减少。这些结果表明，DM中的神经系统控制着性成熟的男性和女性的远距离通话的持续时间。在不同脉冲频率下对DM的电刺激会引起具有不同时频特性模式的呼叫。脉冲频率与时频特性之间的关系显示出性别差异。患RA的男性中它们之间的关系与女性相似。这些结果表明，性成熟男性的DM中的神经回路由受RA的神经输入控制的性共同神经回路组成，并且这些性不同的神经系统产生远距离呼叫的性不同的声学结构。

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