Article (Scientific journals)
The medial preoptic nucleus receives vasotocinergic inputs in male quail: a tract-tracing and immunocytochemical study
Absil, Philippe; Papello, M.; Viglietti-Panzica, C. et al.
2002In Journal of Chemical Neuroanatomy, 24 (1), p. 27-39
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Keywords :
bed nucleus striae terminalis; retrograde tracing; sexual behavior; preoptic area; sex difference; Japanese quail; Coturnix japonica
Abstract :
[en] The sexually dimorphic testosterone-sensitive medial preoptic nucleus (POM) of quail can be identified by the presence of a dense network of vasotocinergic fibers. This innervation is sexually differentiated (present in males only) and testosterone sensitive. The origin of these fibers has never been formally identified although their steroid sensitivity Suggests that they originate in parvocellular vasotocinergic neurons that are found in quail only in the medial part of the bed nucleus striae terminalis (BSTm) and in smaller numbers within the POM itself. We report here that following injections of a retrograde tracer into the POM of male quail, large populations of retrogradely labeled cells can be identified in the BSTm. The POM also receives afferent projections from magnocellular vasotocinergic nuclei, the supraoptic and paraventricular nuclei. Double labeling for vasotocin immunoreactivity of the retrogradely labeled sections failed however to clearly identify magnocellular vasotocin-immunoreactive cells that were retrogradely labeled from POM. In contrast a substantial population of vasotocin-immunoreactive neurons in the BSTm contained tracer retrogradely transported from the POM. These data therefore demonstrate that a significant part of the vasotocinergic innervation of the quail POM originates in the medial part of the BST. An intrinsic innervation could however also contribute to this network. This interaction between BSTm and POM could play a key role in the control of male-typical sexual behavior and in its sex dimorphism in quail. (C) 2002 Elsevier Science B.V. All rights reserved.
Disciplines :
Biochemistry, biophysics & molecular biology
Neurosciences & behavior
Author, co-author :
Absil, Philippe ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Papello, M.
Viglietti-Panzica, C.
Balthazart, Jacques  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biologie de la différenciation sexuelle du cerveau
Panzica, G.
Language :
English
Title :
The medial preoptic nucleus receives vasotocinergic inputs in male quail: a tract-tracing and immunocytochemical study
Publication date :
June 2002
Journal title :
Journal of Chemical Neuroanatomy
ISSN :
0891-0618
eISSN :
1873-6300
Publisher :
Elsevier Science Bv, Amsterdam, Netherlands
Volume :
24
Issue :
1
Pages :
27-39
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 April 2009

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