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Titolo:
Neural song control system of hummingbirds: Comparison to swifts, vocal learning (songbirds) and nonlearning (suboscines) passerines, and vocal learning (budgerigars) and nonlearning (dove, owl, gull, quail, chicken) nonpasserines
Autore:
Gahr, M;
Indirizzi:
Free Univ Amsterdam, Fac Biol, Inst Neurosci, Dept Dev Neurobiol, NL-1081 HV Amsterdam, Netherlands Free Univ Amsterdam Amsterdam Netherlands NL-1081 HV terdam, Netherlands
Titolo Testata:
JOURNAL OF COMPARATIVE NEUROLOGY
fascicolo: 2, volume: 426, anno: 2000,
pagine: 182 - 196
SICI:
0021-9967(20001016)426:2<182:NSCSOH>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
RECEPTOR MESSENGER-RNA; PIGEON COLUMBA-LIVIA; ZEBRA FINCH BRAIN; MELOPSITTACUS-UNDULATUS; TAENIOPYGIA-GUTTATA; CONTROL PATHWAYS; IMMUNOCYTOCHEMICAL LOCALIZATION; IMMUNOREACTIVE CELLS; ANDROGEN RECEPTORS; ESTROGEN-RECEPTORS;
Keywords:
forebrain song control nuclei; song learning; hummingbirds; songbirds; androgen receptor;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
80
Recensione:
Indirizzi per estratti:
Indirizzo: Gahr, M Free Univ Amsterdam, Fac Biol, Inst Neurosci, Dept Dev Neurobiol, De Boelelaan 1087, NL-1081 HV Amsterdam, Netherlands Free Univ Amsterdam DeBoelelaan 1087 Amsterdam Netherlands NL-1081 HV
Citazione:
M. Gahr, "Neural song control system of hummingbirds: Comparison to swifts, vocal learning (songbirds) and nonlearning (suboscines) passerines, and vocal learning (budgerigars) and nonlearning (dove, owl, gull, quail, chicken) nonpasserines", J COMP NEUR, 426(2), 2000, pp. 182-196

Abstract

Males of certain hummingbird species such as Anna's hummingbirds (Calypte anna) learn their song during postnatal development. Here we report that male Anna's hummingbirds and male Amazilia hummingbirds (Amazilia amazilia), two singing hummingbird species, possess forebrain areas that are similar in morphological appearance, location, and connectivity to the song control areas Rtl (nucleus robustus archistriatalis), I-NC (nucleus hyperstriatalisventrale, pars caudale, or higher vocal center), and LMAN (lateral part ofnucleus mangnocellularis anterioris) of oscine passerines (songbirds). Thevocal control areas of songbirds are further defined by the expression of androgen receptors. Similarly, the singing hummingbird species express androgen receptors in the LMAN like area and in the HVC-like area. The hummingbird RA projects to the medullary syringeal motonucleus nXIIts (nucleus hypoglossus pars tracheosyringealis) and the respiratory premotonucleus RAm (nucleus retroambigualis). The HVC-, RA-, and LMAN-like areas are rudimentary in adult male ruby-throated hummingbirds (Archilochus colubris) and Allen'shummingbirds (Selasphorus sasin) and not distinguishable in female hummingbirds, none of which sing. Vocal area-like forebrain areas (delineated by the cytoarchitecture or androgen receptor expression) were not found in vocal nonlearning swifts and suboscines, the taxonomic sister groups of hummingbirds and songbirds, respectively. These areas were also missing in owls, ring doves, gulls, and gallinaceous species, nonpasserines that do not learnvocalizations. Budgerigars (vocal learners) are known to have forebrain vocal areas, but these areas do not express sex steroid receptors. These datasuggest that hummingbirds and songbirds belong to two groups of birds thathave common forebrain circuits. Parts of this circuit are organized as nuclear-like structures (LMAN, HVC, RA) in species that learn to sing. (C) 2000 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 06:35:07