Reference : Sexual differentiation and hormonal control of the sexually dimorphic medial preoptic...
Scientific journals : Article
Human health sciences : Endocrinology, metabolism & nutrition
Life sciences : Zoology
Social & behavioral sciences, psychology : Neurosciences & behavior
http://hdl.handle.net/2268/95772
Sexual differentiation and hormonal control of the sexually dimorphic medial preoptic nucleus in the quail.
English
Panzica, G. C. [> > > >]
Viglietti-Panzica, C. [> > > >]
Calacagni, M. [> > > >]
Anselmetti, G. C. [> > > >]
Schumacher, M. [> > > >]
Balthazart, Jacques mailto [ > > ]
1987
Brain Research
Elsevier Science
416
1
59-68
Yes (verified by ORBi)
International
0006-8993
Amsterdam
The Netherlands
[en] Animals ; Embryo, Nonmammalian/drug effects ; Estradiol/physiology ; Female ; Male ; Orchiectomy ; Ovariectomy ; Preoptic Area/anatomy & histology/embryology/physiology ; Quail/physiology ; Sex Characteristics ; Sexual Behavior, Animal/physiology ; Testosterone/physiology
[en] We recently identified a sexually dimorphic nucleus in the preoptic region of the Japanese quail, the medial preoptic nucleus (POM), which is significantly larger in males than in females. In the present study, we investigated the hormonal control of this morphological neuroanatomical difference and the possible relationships between the sexual dimorphism in POM volume and in copulatory behavior. Treatments which are known to affect sexual behavior were thus applied to different groups of birds and the POM volume was then measured. In one experiment, male and female quails were either gonadectomized, gonadectomized and treated with testosterone or left intact. The larger size of the POM in males was confirmed and treatments significantly affected the nucleus size which was decreased by gonadectomy and restored by testosterone treatment in both sexes to a level similar to that seen in intact males. In two other experiments, eggs were injected with estradiol benzoate on day 9 of incubation and the POM volume was measured in adulthood either in intact birds or in gonadectomized birds receiving a replacement therapy with testosterone. Despite the fact that estradiol benzoate treatment completely suppressed copulatory behavior, it did not affect the volume of the POM or slightly increased it. These data thus show that the POM volume is controlled by testosterone levels in adulthood and could thus be an interesting model for the study of the effects of steroids on the brain.
http://hdl.handle.net/2268/95772
10.1016/0006-8993(87)91496-X

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
110_1987 Panzica POM.pdfPublisher postprint1.43 MBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.