Effect of tracheosyringeal denervation on call in greenfinch (Carduelis sinica)

Science in China. Series C, Life Sciences
D LiH Chen

Abstract

After sections of left or right tracheosyringeal nerve (NXIIts), greenfinches may repeat everyday calls, with no effect on temporal properties. It is suggested that either side of syrinx may produce sound alone and ipsilateral innervation of NXIIts for the syringeal muscles. After section of left NXIIts, the bird produces the vocal pattern of partial tone increase, and effects on the sound intensity and sentence length average 1.4 and 2.8 times those after section of right NXIIts, suggesting that the innervation of NXIIts has left side dominance. After bilateral section of NXIIts, the call rhythm in company with expiratory motions is 98-146 times/min, on an average, and lose all sentence types and syllable structure of normal call. But the call spectra produced by tympaniform membrane vibrations without innervation still reserve frequency components similar to the tonic frequency and harmonics of normal calls.

References

Feb 15, 1976·The Journal of Comparative Neurology·F NottebohmC M Leonard
Jan 1, 1992·Progress in Neurobiology·E Jankowska
Oct 1, 1992·Journal of Neurobiology·H WilliamsF Nottebohm

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Citations

Aug 30, 2008·Science in China. Series C, Life Sciences·J JiangX Yang

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