Large Somal Size Is Associated with the Expression of Galanin but Not with Neuronal Birthdate in the Sexually Dimorphic Male Nucleus of Ferret’s Preoptic Area/Anterior Hypothalamus

1998 ◽  
Vol 68 (4) ◽  
pp. 235-243 ◽  
Author(s):  
Joong-Jean Park ◽  
Jayen H. Patel ◽  
Luqman K. Dad ◽  
Stuart A. Tobet ◽  
Michael J. Baum
Keyword(s):  
Preoptic Area ◽  
Anterior Hypothalamus ◽  
Sexually Dimorphic ◽  
Male Nucleus

Ontogeny of the sexually dimorphic male nucleus in the preoptic / anterior hypothalamus of ferrets and its manipulation by gonadal steroids

1990 ◽  
Vol 21 (6) ◽  
pp. 844-857 ◽  
Author(s):  
James A. Cherry ◽  
Mark E. Basham ◽  
Charles E. Weaver ◽  
Randolph W. Krohmer ◽  
Michael J. Baum
Keyword(s):  
Anterior Hypothalamus ◽  
Gonadal Steroids ◽  
Sexually Dimorphic ◽  
Male Nucleus

scholarly journals The Volume of a Sexually Dimorphic Nucleus in the Ovine Medial Preoptic Area/Anterior Hypothalamus Varies with Sexual Partner Preference

Endocrinology ◽  
2004 ◽  
Vol 145 (2) ◽  
pp. 478-483 ◽  
Author(s):  
Charles E. Roselli ◽  
Kay Larkin ◽  
John A. Resko ◽  
John N. Stellflug ◽  
Fred Stormshak
Keyword(s):  
Sexual Partner ◽  
Preoptic Area ◽  
Medial Preoptic Area ◽  
Anterior Hypothalamus ◽  
Cell Group ◽  
Sexually Dimorphic ◽  
Mrna Levels ◽  
Sexual Preferences ◽  
Estrogen Synthesis ◽  
Sexually Dimorphic Nucleus

Abstract Sheep are one of the few animal models in which natural variations in male sexual preferences have been studied experimentally. Approximately 8% of rams exhibit sexual preferences for male partners (male-oriented rams) in contrast to most rams, which prefer female partners (female-oriented rams). We identified a cell group within the medial preoptic area/anterior hypothalamus of age-matched adult sheep that was significantly larger in adult rams than in ewes. This cell group was labeled the ovine sexually dimorphic nucleus (oSDN). In addition to a sex difference, we found that the volume of the oSDN was two times greater in female-oriented rams than in male-oriented rams. The dense cluster of neurons that comprise the oSDN express cytochrome P450 aromatase. Aromatase mRNA levels in the oSDN were significantly greater in female-oriented rams than in ewes, whereas male-oriented rams exhibited intermediate levels of expression. Because the medial preoptic area/anterior hypothalamus is known to control the expression of male sexual behaviors, these results suggest that naturally occurring variations in sexual partner preferences may be related to differences in brain anatomy and capacity for estrogen synthesis.

Relationship between sexual behavior and sexually dimorphic structures in the anterior hypothalamus in control and prenatally stressed male rats

1999 ◽  
Vol 50 (3) ◽  
pp. 193-199 ◽  
Author(s):  
Reuben W Rhees ◽  
Hamid N Al-Saleh ◽  
Edward W Kinghorn ◽  
Donovan E Fleming ◽  
Edwin D Lephart
Keyword(s):  
Sexual Behavior ◽  
Anterior Hypothalamus ◽  
Male Rats ◽  
Sexually Dimorphic ◽  
Prenatally Stressed
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