Stereotypic Laryngeal and Respiratory Motor Patterns Generate Different Call Types in Rat Ultrasound Vocalization
Stereotypic Laryngeal and Respiratory Motor Patterns Generate Different Call Types in Rat Ultrasound Vocalization
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DOI：
10.1002/jez.1785
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发表时间：
2013-04-01
影响因子：
2.8
通讯作者：
Riede, Tobias
中科院分区：
文献类型：
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作者：
Riede, Tobias
啮齿动物产生高度可变的超声波哨声作为通信信号，不像许多其他哺乳动物，他们采用流动诱导的声带振荡来产生声音。采用喉肌肌电图（EMG）活动、声门下压测量和发声输出等方法，研究了清醒和自发行为的SpragueDawley大鼠喉肌在超声发声（USV）中控制不同类型发声特征的作用。结果支持声门形状决定基频的假设。甲杓肌和环甲肌的EMG活动与通话时间一致。肌电信号强度随基频的增加而增加。两种肌肉的相位活动与快速变化的基频轮廓一致，例如在颤音中。胸骨甲状肌和胸骨舌骨肌（其他哺乳动物中参与发声的两种肌肉）的活动对于大鼠USV的产生并不关键。为了测试刻板的喉部和呼吸活动是如何跨呼叫类型和个体的，在六种不同的呼叫类型从六只大鼠中测量了十组EMG和声门下压力参数。使用判别函数分析，平均80%的参数集被正确地分配给它们各自的调用类型。这明显高于概率水平。由于USV的基频特征与喉内肌和声门下压形成肌的刻板活动密切相关，因此USV提供了对外周发声运动模式的神经生理控制的深入了解。J. Exp. Zool.319A：213224，2013. (c)2013 Wiley Periodicals，Inc.
Rodents produce highly variable ultrasound whistles as communication signals unlike many other mammals, who employ flow-induced vocal fold oscillations to produce sound. The role of larynx muscles in controlling sound features across different call types in ultrasound vocalization (USV) was investigated using laryngeal muscle electromyographic (EMG) activity, subglottal pressure measurements and vocal sound output in awake and spontaneously behaving SpragueDawley rats. Results support the hypothesis that glottal shape determines fundamental frequency. EMG activities of thyroarytenoid and cricothyroid muscles were aligned with call duration. EMG intensity increased with fundamental frequency. Phasic activities of both muscles were aligned with fast changing fundamental frequency contours, for example in trills. Activities of the sternothyroid and sternohyoid muscles, two muscles involved in vocal production in other mammals, are not critical for the production of rat USV. To test how stereotypic laryngeal and respiratory activity are across call types and individuals, sets of ten EMG and subglottal pressure parameters were measured in six different call types from six rats. Using discriminant function analysis, on average 80% of parameter sets were correctly assigned to their respective call type. This was significantly higher than the chance level. Since fundamental frequency features of USV are tightly associated with stereotypic activity of intrinsic laryngeal muscles and muscles contributing to build-up of subglottal pressure, USV provide insight into the neurophysiological control of peripheral vocal motor patterns. J. Exp. Zool. 319A:213224, 2013. (c) 2013 Wiley Periodicals, Inc.