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- Organizational-Activational_Hypothesis abstract "The Organizational-Activational Hypothesis states that steroid hormones permanently organize the nervous system during early development, which is reflected in adult male or female typical behaviors. In adulthood, the same steroid hormones activate, modulate, and inhibit these behaviors. This idea was revolutionary when first published in 1959 because no other previous experiment had demonstrated that adult behaviors could be determined hormonally during early development. The Phoenix et al. study sought to discover whether gonadal hormones given during the prenatal period had organizing effects on guinea pigs’ reproductive behavior It was found that when female controls, gonadectomized (removal of gonads) females, hermaphrodites, and castrated males were injected prenatally with testosterone proprionate, the mean number of mounts increased. This increase in male-typical reproductive behavior shows that prenatal androgens have a masculinizing effect. Moreover, the organizing effects of hormones can have permanent effects. Phoenix et al. found that females injected with testosterone propionate while pregnant, instead of neonatally, did not have any effect on lordosis. This demonstrates that when testosterone is given postnatally in females, there may not be lasting effects as compared to prenatally administered testosterone. The data from this study supports the organizational hypothesis that states when androgens are given prenatally there is an organizing effect on sexual behavior, permanently altering normal female mating behavior as adults.".
- Organizational-Activational_Hypothesis wikiPageID "46607376".
- Organizational-Activational_Hypothesis wikiPageLength "12739".
- Organizational-Activational_Hypothesis wikiPageOutDegree "15".
- Organizational-Activational_Hypothesis wikiPageRevisionID "688946947".
- Organizational-Activational_Hypothesis wikiPageWikiLink Androgen.
- Organizational-Activational_Hypothesis wikiPageWikiLink Castration.
- Organizational-Activational_Hypothesis wikiPageWikiLink Category:Development.
- Organizational-Activational_Hypothesis wikiPageWikiLink Category:Hormones.
- Organizational-Activational_Hypothesis wikiPageWikiLink Critical_period.
- Organizational-Activational_Hypothesis wikiPageWikiLink Digit_ratio.
- Organizational-Activational_Hypothesis wikiPageWikiLink Estradiol.
- Organizational-Activational_Hypothesis wikiPageWikiLink Estrogen.
- Organizational-Activational_Hypothesis wikiPageWikiLink Lordosis.
- Organizational-Activational_Hypothesis wikiPageWikiLink Preoptic_area.
- Organizational-Activational_Hypothesis wikiPageWikiLink Sex_steroid.
- Organizational-Activational_Hypothesis wikiPageWikiLink Sexual_dimorphism.
- Organizational-Activational_Hypothesis wikiPageWikiLink Steroid_hormone.
- Organizational-Activational_Hypothesis wikiPageWikiLink Testosterone.
- Organizational-Activational_Hypothesis wikiPageUsesTemplate Template:Reflist.
- Organizational-Activational_Hypothesis subject Category:Development.
- Organizational-Activational_Hypothesis subject Category:Hormones.
- Organizational-Activational_Hypothesis comment "The Organizational-Activational Hypothesis states that steroid hormones permanently organize the nervous system during early development, which is reflected in adult male or female typical behaviors. In adulthood, the same steroid hormones activate, modulate, and inhibit these behaviors. This idea was revolutionary when first published in 1959 because no other previous experiment had demonstrated that adult behaviors could be determined hormonally during early development. The Phoenix et al.".
- Organizational-Activational_Hypothesis label "Organizational-Activational Hypothesis".
- Organizational-Activational_Hypothesis sameAs Q22907521.
- Organizational-Activational_Hypothesis sameAs m.0136zr1_.
- Organizational-Activational_Hypothesis sameAs Q22907521.
- Organizational-Activational_Hypothesis wasDerivedFrom Organizational-Activational_Hypothesis?oldid=688946947.
- Organizational-Activational_Hypothesis isPrimaryTopicOf Organizational-Activational_Hypothesis.