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首页> 外文期刊>The European Journal of Neuroscience >Audio-vocal interaction in the pontine brainstem during self-initiated vocalization in the squirrel monkey.
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Audio-vocal interaction in the pontine brainstem during self-initiated vocalization in the squirrel monkey.

机译：松鼠猴自发发声期间桥脑干中的音频-声音交互。

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摘要

The adjustment of the voice by auditory input happens at several brain levels. The caudal pontine brainstem, though rarely investigated, is one candidate area for such audio-vocal integration. We recorded neuronal activity in this area in awake, behaving squirrel monkeys (Saimiri sciureus) during vocal communication, using telemetric single-unit recording techniques. We found audio-vocal neurons at locations not described before, namely in the periolivary region of the superior olivary complex and the adjacent pontine reticular formation. They showed various responses to external sounds (noise bursts) and activity increases (excitation) or decreases (inhibition) to self-produced vocalizations, starting prior to vocal onset and continuing through vocalizations. In most of them, the responses to noise bursts and self-produced vocalizations were similar, with the only difference that neuronal activity started prior to vocal onset. About one-third responded phasically to noise bursts, independent of whether they increased or decreased their activity to vocalization. The activity of most audio-vocal neurons correlated with basic acoustic features of the vocalization, such as call duration and/or syllable structure. Auditory neurons near audio-vocal neurons showed significantly more frequent phasic response patterns than those in areas without audio-vocal activity. Based on these findings, we propose that audio-vocal neurons showing similar activity to external acoustical stimuli and vocalization play a role in olivocochlear regulation. Specifically, audio-vocal neurons with a phasic response to external auditory stimuli are candidates for the mediation of basal audio-vocal reflexes such as the Lombard reflex. Thus, our findings suggest that complex audio-vocal integration mechanisms exist in the ventrolateral pontine brainstem.
机译：听觉输入对声音的调节发生在几个大脑水平上。尾桥脑干虽然很少进行研究，但却是这种声音-声音融合的候选区域。我们使用遥测单单元录音技术，在清醒时记录了该区域神经元的活动，表现为在声乐交流中表现为松鼠猴（Saimiri sciureus）。我们在之前未描述的位置，即上橄榄复合体的橄榄膜周围区域和相邻桥脑网状结构中发现了声带神经元。他们表现出对外部声音的各种响应（噪声爆发），并且对自发发声的活动增加（激发）或减弱（抑制），从发声开始就一直持续到发声。在它们中的大多数中，对噪声爆发和自我产生的发声的响应是相似的，唯一的区别是神经元活动在发声之前就开始了。约有三分之一的人对噪音爆发有阶段性的响应，而与它们是否增加发声活动无关。大多数音频神经元的活动与发声的基本声学特征（例如通话时间和/或音节结构）相关。与没有声音活动的区域相比，靠近声音神经元的听觉神经元显示出更频繁的阶段性反应模式。基于这些发现，我们建议显示与外部听觉刺激和发声相似的活动的声带神经元在少脂调节中起作用。具体而言，对外部听觉刺激具有阶段性反应的音频神经元是介导诸如朗伯反射的基础音频反射的候选者。因此，我们的研究结果表明腹侧脑桥脑干中存在复杂的声音-声音整合机制。

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