IFIBA   22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
78 Low-dimensional dynamical model for the diversity of pressure patterns used in canary song
Autor/es:
L. ALONSO; ALLIENDE J; GOLLER F; MINDLIN G B
Revista:
PHYSICAL REVIEW E - STATISTICAL PHYSICS, PLASMAS, FLUIDS AND RELATED INTERDISCIPLINARY TOPICS
Editorial:
aps
Referencias:
Lugar: ridge; Año: 2009 vol. 79 p. 1 - 8
ISSN:
1063-651X
Resumen:
During song production, oscine birds produce large air sac pressure pulses. During those pulses, energy is
transferred to labia located at the juncture between the bronchii and the trachea, inducing the high frequency
labial oscillations which are responsible for airflow modulations, i.e., the uttered sound. In order to generate
diverse syllables, canaries Serinus canaria use a set of air sac pressure patterns with characteristic shapes. In
this work we show that these different shapes can be approximated by the subharmonic solutions of a forced
normal form. This simple model is built from identifying dynamical elements which allow to reproduce the
shape of the pressure pattern corresponding to one syllable type. Remarkably, integrating that simple model for
other parameters allows to recover the other pressure patterns used during song. Interpreting the diversity of
these physiological gestures as subharmonic solutions of a simple nonlinear system allows us to account
simultaneously for their morphological features as well as for the syllabic timing and suggests a strategy for the
generation of complex motor patterns.