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Peripheral Vocal Motor Dynamics and Combinatory Call Complexity of Ultrasonic Vocal Production in Rats

2018; Elsevier BV; Linguagem: Inglês

10.1016/b978-0-12-809600-0.00005-6

2212-1080

Tobias Riede,

Neuroscience and Music Perception

Peripheral vocal motor dynamics describes how complex interactions of laryngeal, respiratory and vocal tract movements generate and shape vocal sounds in rats. Glottal airflow provides the energy and laryngeal movements set important boundary conditions. The integration of laryngeal and breathing movements is investigated through simultaneous recordings of subglottal pressure and electromyographic (EMG) activity of intrinsic and extrinsic laryngeal muscles. Laryngeal muscle activity and subglottal pressure are in a close and complex relationship associated with specific call types. Rats use combinations and recombinations of different synergies of laryngeal and respiratory muscles to produce more complex composite call types; in other words, simple calls are concatenated to complex calls. The combination of a small set of synergies to create more complex acoustic behavior is consistent with the concept of a hierarchical modular organization of the motor control network. This modular organization simplifies the neural control of vocal movement and enhances vocal complexity.