Seasonal changes in avian song control circuits do not cause seasonal changes in song discrimination in song sparrows

2003 ◽  
Vol 57 (2) ◽  
pp. 119-129 ◽  
Author(s):  
Brendan J. Reeves ◽  
Michael D. Beecher ◽  
Eliot A. Brenowitz
Keyword(s):  
Seasonal Changes ◽  
Song Sparrows ◽  
Song Discrimination ◽  
Control Circuits ◽  
Song Control ◽  
Avian Song

scholarly journals Seasonal Changes in Patterns of Gene Expression in Avian Song Control Brain Regions

PLoS ONE ◽  
2012 ◽  
Vol 7 (4) ◽  
pp. e35119 ◽  
Author(s):  
Christopher K. Thompson ◽  
John Meitzen ◽  
Kirstin Replogle ◽  
Jenny Drnevich ◽  
Karin L. Lent ◽  
...  
Keyword(s):  
Gene Expression ◽  
Seasonal Changes ◽  
Brain Regions ◽  
Control Brain ◽  
Song Control ◽  
Avian Song

Geographic Song Discrimination in Relation to Dispersal Distances in Song Sparrows

2002 ◽  
Vol 159 (3) ◽  
pp. 221
Author(s):  
Searcy ◽  
Nowicki ◽  
Hughes ◽  
Peters
Keyword(s):  
Song Sparrows ◽  
Song Discrimination ◽  
Dispersal Distances

scholarly journals Seasonal changes in the song control nuclei of the Rufous‐bellied Thrush, Turdus rufiventris (Oscine, Passeriformes, and Turdidae)

2019 ◽  
Vol 332 (3-4) ◽  
pp. 92-98
Author(s):  
Jamily Lorena ◽  
Christopher R. Olson ◽  
Carla S. Fontana ◽  
Claudio V. Mello ◽  
Maria Paula C. Schneider ◽  
...  
Keyword(s):  
Seasonal Changes ◽  
Song Control Nuclei ◽  
Song Control

Hemispheric Coordination Is Necessary for Song Production in Adult Birds: Implications for a Dual Role for Forebrain Nuclei in Vocal Motor Control

2008 ◽  
Vol 99 (1) ◽  
pp. 373-385 ◽  
Author(s):  
Robin C. Ashmore ◽  
Mark Bourjaily ◽  
Marc F. Schmidt
Keyword(s):  
Anterior Commissure ◽  
Temporal Structure ◽  
Dual Role ◽  
Critical Feature ◽  
Motor Circuits ◽  
Output Structure ◽  
Complex Motor ◽  
Song Production ◽  
Song Control ◽  
Avian Song

Precise coordination across hemispheres is a critical feature of many complex motor circuits. In the avian song system the robust nucleus of the arcopallium (RA) plays a key role in such coordination. It is simultaneously the major output structure for the descending vocal motor pathway, and it also sends inputs to structures in the brain stem and thalamus that project bilaterally back to the forebrain. Because all birds lack a corpus callosum and the anterior commissure does not interconnect any of the song control nuclei directly, these bottom-up connections form the only pathway that can coordinate activity across hemispheres. In this study, we show that unilateral lesions of RA in adult male zebra finches ( Taeniopigia guttata) completely and permanently disrupt the bird's stereotyped song. In contrast, lesions of RA in juvenile birds do not prevent the acquisition of normal song as adults. These results highlight the importance of hemispheric interdependence once the circuit is established but show that one hemisphere is sufficient for complex vocal behavior if this interdependence is prevented during a critical period of development. The ability of birds to sing with a single RA provides the opportunity to test the effect of targeted microlesions in RA without confound of functional compensation from the contralateral RA. We show that microlesions cause significant changes in song temporal structure and implicate RA as playing a major part in the generation of song temporal patterns. These findings implicate a dual role for RA, first as part of the program generator for song and second as part of the circuit that mediates interhemispheric coordination.

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