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Production and survival of projection neurons in a forebrain vocal center of adult male canaries

JR Kirn, A Alvarez-Buylla and F Nottebohm
Journal of Neuroscience 1 June 1991, 11 (6) 1756-1762; DOI: https://doi.org/10.1523/JNEUROSCI.11-06-01756.1991
JR Kirn
Rockefeller University Field Research Center, Millbrook, New York 12545.
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A Alvarez-Buylla
Rockefeller University Field Research Center, Millbrook, New York 12545.
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F Nottebohm
Rockefeller University Field Research Center, Millbrook, New York 12545.
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Abstract

Neurons are produced in the adult canary telencephalon. Many of these cells are incorporated into the high vocal center (nucleus HVC), which participates in the control of learned song. In the present work, 3H- thymidine and fluorogold were employed to follow the differentiation and survival of HVC neurons born in adulthood. We found that many HVC neurons born in September grow long axons to the robust nucleus of the archistriatum (nucleus RA) and thus become part of the efferent pathway for song control. Many of these new neurons have already established their connections with RA by 30 d after their birth. By 240 d, 75–80% of the September-born HVC neurons project to RA. Most of these new projection neurons survive at least 8 months. The longevity of HVC neurons born in September suggests that these cells remain part of the vocal control circuit long enough to participate in the yearly renewal of the song repertoire.

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The Journal of Neuroscience: 11 (6)
Journal of Neuroscience
Vol. 11, Issue 6
1 Jun 1991
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Production and survival of projection neurons in a forebrain vocal center of adult male canaries
JR Kirn, A Alvarez-Buylla, F Nottebohm
Journal of Neuroscience 1 June 1991, 11 (6) 1756-1762; DOI: 10.1523/JNEUROSCI.11-06-01756.1991

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Production and survival of projection neurons in a forebrain vocal center of adult male canaries
JR Kirn, A Alvarez-Buylla, F Nottebohm
Journal of Neuroscience 1 June 1991, 11 (6) 1756-1762; DOI: 10.1523/JNEUROSCI.11-06-01756.1991
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