Nucleus Preopticus Anterior

In the Nucleus preopticus anterior (POA), fadrozole treatment decreased AR in both sexes and decreased PR in females but not in males.  

In the anterior and posterior hypothalamus of courting birds an increase number of AR-ir and PR-ir neurons colocalizes (70-90%) in the Nucleus preopticus anterior (POA), nucleus preopticus medialis (POM), nucleus preopticus paraventricularis magnocellularis (PPM), nucleus hypothalami lateralis posterioris (PLH), and tuberal hypothalamus (Tu).  

In the anterior hypothalamus, high density of AR-ir was concentrated in several nuclei including the nucleus lateralis hypothalami, nucleus periventricularis magnocellularis, Nucleus preopticus anterior, nucleus preopticus medialis, and nucleus preopticus paraventricularis magnocellularis.  

In fact, high and low binding levels were obtained in the suprachiasmatic area and nucleus ectomamillaris (p < 0.01) and in the Nucleus preopticus anterior and paleostriatum primitivum (p < 0.001), respectively.  

A large number of VT-immunoreactive cells was found in the Nucleus preopticus anterior and nucleus paraventricularis.  

Castration in fact, elevated [ 3H] flunitrazepam binding in the Nucleus preopticus anterior and reduced binding levels in archistriatum dorsalis et ventralis and in the nucleus intercollicularis; all of these areas are known to have gonadal steroid receptors.  

Low receptor levels were found in the Nucleus preopticus anterior and the nucleus lateralis of the hypothalamic regions (less than 220 fmol/mg wet weight of tissue) as well as thalamic nuclei such as rotundus and pretectalis (220-261 fmol/mg wet weight of tissue).  

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