نتایج جستجو برای: finch

تعداد نتایج: 2084  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1999
A Sato C O'hUigin F Figueroa P R Grant B R Grant H Tichy J Klein

Darwin's finches comprise a group of passerine birds first collected by Charles Darwin during his visit to the Galápagos Archipelago. The group, a textbook example of adaptive radiation (the diversification of a founding population into an array of species differentially adapted to diverse environmental niches), encompasses 14 currently recognized species, of which 13 live on the Galápagos Isla...

Journal: :NeuroImage 2008
Colline Poirier Michiel Vellema Marleen Verhoye Vincent Van Meir J. Martin Wild Jacques Balthazart Annemarie van der Linden

The neurobiology of birdsong, as a model for human speech, is a fast growing area of research in the neurosciences and involves electrophysiological, histological and more recently magnetic resonance imaging (MRI) approaches. Many of these studies require the identification and localization of different brain areas (nuclei) involved in the sensory and motor control of song. Until now, the only ...

Journal: :The Journal of comparative neurology 2014
Michael C Condro Stephanie A White

Variants of the contactin associated protein-like 2 (Cntnap2) gene are risk factors for language-related disorders including autism spectrum disorder, specific language impairment, and stuttering. Songbirds are useful models for study of human speech disorders due to their shared capacity for vocal learning, which relies on similar cortico-basal ganglia circuitry and genetic factors. Here we in...

Journal: :Evolution; international journal of organic evolution 2000
A V Badyaev T E Martin

Sexual dimorphism is thought to have evolved in response to selection pressures that differ between males and females. Our aim in this study was to determine the role of current net selection in shaping and maintaining contemporary sexual dimorphism in a recently established population of the house finch (Carpodacus mexicanus) in Montana. We found strong differences between sexes in direction o...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2011
Alexandro D Ramirez Yashar Ahmadian Joseph Schumacher David Schneider Sarah M N Woolley Liam Paninski

Birdsong is comprised of rich spectral and temporal organization, which might be used for vocal perception. To quantify how this structure could be used, we have reconstructed birdsong spectrograms by combining the spike trains of zebra finch auditory midbrain neurons with information about the correlations present in song. We calculated maximum a posteriori estimates of song spectrograms using...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1994
R Mooney M Rao

This study examines the development of two neural pathways within the zebra finch forebrain that function respectively in the juvenile acquisition and the adult production of learned song. In the adult male zebra finch forebrain, the song nuclei L-MAN and HVc both innervate nucleus RA; L-MAN plays a crucial role in juvenile song acquisition but, unlike HVc and RA, is not essential for adult son...

Journal: :The Journal of biological chemistry 1994
J Junker J R Sommer M Sar G Meissner

The ryanodine receptor (RYR)/Ca2+ release channel of avian cardiac muscle was localized by immunocytochemical techniques and biochemically characterized using isolated membrane and receptor protein fractions. Monoclonal antibody C3-33 raised against the canine cardiac RYR bound to the junctional sarcoplasmic reticulum of pigeon and finch hearts, both at peripheral couplings and at extended junc...

Journal: :Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco 2014
William M Perry Susanne L T Cappendijk

INTRODUCTION The process through which the zebra finch (Taeniopygia guttata) acquires and produces crystallized song has long been thought of as highly analogous to the process through which humans acquire and produce speech. Nicotinic acetylcholine receptors are present in song nuclei that play important roles in song production and/or acquisition. We studied the effect of in vivo nicotine on ...

Journal: :The Journal of pharmacology and experimental therapeutics 2001
K Soderstrom F Johnson

Zebra finches (Taeniopygia guttata) learn vocal behavior during sensitive developmental periods, similar to the way in which human language is acquired. As adults, they recite the learned song pattern in a stereotyped manner. Previously, we demonstrated that central nervous system-associated cannabinoid receptors (CB1) are expressed in brain regions known to control both juvenile song learning ...

2010
Lubica Kubikova Kazuhiro Wada Erich D Jarvis

Dopamine is a key neuromodulatory transmitter in the brain. It acts through dopamine receptors to affect changes in neural activity, gene expression, and behavior. In songbirds, dopamine is released into the striatal song nucleus Area X, and the levels depend on social contexts of undirected and directed singing. This differential release is associated with differential expression of activity-d...

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