Early appearance of catecholaminergic neurons in the central nervous system of precocial and altricial avian species |
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Authors: | Prof. R. Guglielmone G. C. Panzica |
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Affiliation: | (1) Institute of Human Anatomy, Institute of Histology and General Embryology, University of Turin, Turin, Italy;(2) Istituto di Anatomia Umana Normale, c.so M. D'Azeglio 52, I-10126 Torino, Italy |
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Abstract: | Summary The early appearance of catecholaminergic neurons, as revealed by fluorescence histochemistry, has been determined in the central nervous system of quail, pheasant, and pigeon embryos. The first neuronal assemblies displaying specific fluorescence are the locus coeruleus and the nucleus subcoeruleus ventralis. Taking into account the differences in the length of the prehatching period of these three avian species, the first catecholamine-containing neurons appear earlier in the precocial quail and pheasant than in the altricial pigeon.Investigation supported by grants from the Italian National Research Council (CNR) No 83.02058.04 (R.G.) and No 83.00492.04 (G.C.P.). |
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Keywords: | Catecholamine-containing neurons Central nervous system Development, ontogenetic Avian embryos |
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