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Abstract:

Like human infants, songbirds acquire their song by imitation and eventually generate sounds that result from complicated neural networks and intrinsically nonlinear physical processes. Signatures of low-dimensional chaos such as subharmonic bifurcations have been reported in adult and developing zebra finch song. Here, we use methods from nonlinear dynamics to test whether adult male zebra finches (Taenopygia guttata) use the intrinsic nonlinear properties of their vocal organ, the syrinx, to insert subharmonic transitions in their song. In contrast to previous dataonthe basis of spectrographic evidence, we show that subharmonic transitions do not occur in adult song. Subharmonic transitions also do not arise in artificially induced sound in the intact syrinx, but are commonly generated in the excised syrinx. These findings suggest that subharmonic transitions are not used to increase song complexity, and that the brain controls song in a surprisingly smooth control regimen. Fast, smooth changes in acoustic elements can be produced by direct motor control in a stereotyped fashion, which is amorereliable indicator of male fitness than abrupt acoustic changes that do not require similarly precise control. Consistent with this view is the presence of high fidelity at every level of motor control, from telencephalic premotor areas to superfast syringeal muscles. Copyright © 2010 the authors.

Registro:

Documento: Artículo
Título:Smooth operator: Avoidance of subharmonic bifurcations through mechanical mechanisms simplifies song motor control in adult zebra finches
Autor:Elemans, C.P.H.; Laje, R.; Mindlin, G.B.; Goller, F.
Filiación:Department of Biology, University of Utah, Salt Lake City, UT 84112, United States
Departamento de Física, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Sound Communication Group, University of Southern Denmark, 5230 Odense M, Denmark
Department of Science and Technology, University of Quilmes, R. S. Peña 352, Bernal (B1876BXD), Argentina
Palabras clave:acoustics; animal experiment; article; brain function; controlled study; finch; male; mechanics; motor control; nonhuman; nonlinear system; premotor cortex; priority journal; songbird; sound detection; Taenopygia guttata; telencephalon; vocal cord; vocalization; Acoustics; Age Factors; Animals; Behavior, Animal; Brain; Efferent Pathways; Finches; Laryngeal Muscles; Larynx; Male; Nonlinear Dynamics; Psychomotor Performance; Signal Processing, Computer-Assisted; Sound; Sound Spectrography; Vocalization, Animal
Año:2010
Volumen:30
Número:40
Página de inicio:13246
Página de fin:13253
DOI: http://dx.doi.org/10.1523/JNEUROSCI.1130-10.2010
Título revista:Journal of Neuroscience
Título revista abreviado:J. Neurosci.
ISSN:02706474
CODEN:JNRSD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02706474_v30_n40_p13246_Elemans

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Citas:

---------- APA ----------
Elemans, C.P.H., Laje, R., Mindlin, G.B. & Goller, F. (2010) . Smooth operator: Avoidance of subharmonic bifurcations through mechanical mechanisms simplifies song motor control in adult zebra finches. Journal of Neuroscience, 30(40), 13246-13253.
http://dx.doi.org/10.1523/JNEUROSCI.1130-10.2010
---------- CHICAGO ----------
Elemans, C.P.H., Laje, R., Mindlin, G.B., Goller, F. "Smooth operator: Avoidance of subharmonic bifurcations through mechanical mechanisms simplifies song motor control in adult zebra finches" . Journal of Neuroscience 30, no. 40 (2010) : 13246-13253.
http://dx.doi.org/10.1523/JNEUROSCI.1130-10.2010
---------- MLA ----------
Elemans, C.P.H., Laje, R., Mindlin, G.B., Goller, F. "Smooth operator: Avoidance of subharmonic bifurcations through mechanical mechanisms simplifies song motor control in adult zebra finches" . Journal of Neuroscience, vol. 30, no. 40, 2010, pp. 13246-13253.
http://dx.doi.org/10.1523/JNEUROSCI.1130-10.2010
---------- VANCOUVER ----------
Elemans, C.P.H., Laje, R., Mindlin, G.B., Goller, F. Smooth operator: Avoidance of subharmonic bifurcations through mechanical mechanisms simplifies song motor control in adult zebra finches. J. Neurosci. 2010;30(40):13246-13253.
http://dx.doi.org/10.1523/JNEUROSCI.1130-10.2010