Article (Scientific journals)
A Dorsomedial Subdivision within the Nucleus Intercollicularis Identified in the Japanese Quail (Coturnix Coturnix Japonica) by Means of Alpha 2-Adrenergic Receptor Autoradiography and Estrogen Receptor Immunohistochemistry
Ball, G. F.; Foidart, Agnès; Balthazart, Jacques
1989In Cell and Tissue Research, 257 (1), p. 123-8
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Abstract :
[en] The nucleus intercollicularis is an important site in the control of vocalization in birds. In oscines, a subregion of the nucleus intercollicularis called the dorso-medial intercollicular nucleus appears to play a key role in this process because it receives the majority of the projections from the nucleus robustus archistriatalis and sends most of the projections to the motor nucleus of the hypoglossal nerve. In this paper, we present neurochemical studies of the nucleus intercollicularis in the Japanese quail which suggest the presence of heterogeneity within this structure. One rostral band contains high densities of cholinergic muscarinic receptors identified by quantitative autoradiography using tritiated N-methylscopolamine as the ligand. A caudal dorso-medial region is specifically labeled by estrogen receptors identified using immunocytochemistry and by alpha 2-adrenergic receptors which were quantified by autoradiography using tritiated para-amino-clonidine. This latter subregion is possibly equivalent to the dorso-medial intercollicular nucleus of oscines. Additional track-tracing studies should be performed to confirm this homology. The coexistence of estrogen and alpha 2-adrenergic receptors within the same structure suggests important functional connections between steroid action and catecholaminergic systems in the brain.
Disciplines :
Endocrinology, metabolism & nutrition
Neurosciences & behavior
Zoology
Author, co-author :
Ball, G. F.
Foidart, Agnès ;  Université de Liège - ULiège > Services généraux (Faculté de médecine) > Service administratif de la Faculté (Médecine)
Balthazart, Jacques  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biologie de la différenciation sexuelle du cerveau
Language :
English
Title :
A Dorsomedial Subdivision within the Nucleus Intercollicularis Identified in the Japanese Quail (Coturnix Coturnix Japonica) by Means of Alpha 2-Adrenergic Receptor Autoradiography and Estrogen Receptor Immunohistochemistry
Publication date :
July 1989
Journal title :
Cell and Tissue Research
ISSN :
0302-766X
eISSN :
1432-0878
Publisher :
Springer, Germany
Volume :
257
Issue :
1
Pages :
123-8
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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