Developmental origin and identity of song system neurons born during vocal learning in songbirds.

Full Abstract

New neurons are added to the forebrain song control regions high vocal center (HVC) and Area X of juvenile songbirds but the identity and site of origin of these cells have not been fully characterized. We used oncoretroviral vectors to genetically label neuronal progenitors in different regions of the zebra finch lateral ventricle. A region corresponding to the mammalian medial and lateral ganglionic eminences generated medium spiny neurons found in Area X and in the striatum surrounding Area X, and at least two classes of interneurons found in HVC. In addition, our experiments indicate that the HVC projection neurons that project into nucleus robust nucleus of the arcopallium (RA) are born locally from the ventricular region immediately dorsal to HVC. The ability to genetically target neuron subpopulations that give rise to different song system cell types provides a tool for specific genetic manipulations of these cell types. In addition, our results suggest striking similarities between neurogenesis in the embryonic mammalian brain and in the brain of the juvenile songbird and provide further evidence for the existence of conserved cell types in the forebrain for birds and mammals.

Author information

Author/s: Scott, Benjamin B (BB); Lois, Carlos (C);

Affiliation: Department of Brain and Cognitive Sciences, Picower Institute for Learning and Memory, MIT, Cambridge, MA 02139, USA.

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: The Journal of comparative neurology (J Comp Neurol), published in United States. (Language: eng)

Reference: 2007-May; vol 502 (issue 2) : pp 202-14

Dates: Created 2007/03/15; Completed 2007/06/26;

PMID: 17348018, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Green Fluorescent Proteins - metabolism
High Vocal Center - cytology; growth & development
Homeodomain Proteins - metabolism
Learning - physiology
Neurons - physiology
T-Box Domain Proteins - metabolism
Vocalization, Animal - physiology
gamma-Aminobutyric Acid - metabolism

Associated Chemicals: Dopamine and cAMP-Regulated Phosphoprotein 32 (0) ; Homeodomain Proteins (0) ; T-Box Domain Proteins (0) ; Green Fluorescent Proteins (147336-22-9) ; gamma-Aminobutyric Acid (56-12-2) ; Cholera Toxin (9012-63-9)

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