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Hypothalamus sex

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    Animal experiments have provided evidence for the presence of sex differences from the synaptic level up to behaviour. Although sex differences in the human brain may have been presumed implicitly since the days of Aristotle, research on the presence of functional and structural sex differences of the human brain started only relatively recently. The most conspicuous sex difference in the mammalian brain was described by Gorski et al. We found that the volume of a putative homologue of this sexually dimorphic nucleus SDN in the adult human hypothalamus was more than twice as large in men as in women and contained about twice as many cells. Recently a similar sex difference and volume has been described for the human bed nucleus of the stria terminalis and 'interstitial nuclei of the hypothalamus' INAH. Sexual differentiation of the hypothalamus was generally believed to take place between 4 and 7 months of gestation.
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    Gender and sexual orientation in relation to hypothalamic structures

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    Sex – Is It All In the Brain? | Brain Blogger

    Like food, sex is an important part of our lives. From an evolutionary perspective, the reason is obvious—perpetuation of the species. Sexual behavior in humans, however, involves much more than reproduction. This section provides an overview of research that has been conducted on human sexual behavior and motivation. This section will close with a discussion of issues related to gender and sexual orientation. Much of what we know about the physiological mechanisms that underlie sexual behavior and motivation comes from animal research. Surprisingly, medial preoptic lesions do not change how hard a male rat is willing to work to gain access to a sexually receptive female.
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    Hypothalamus

    A hormone is a chemical substance of an endocrine gland. Endocrine glands, which are also called ductless glans, deposites the hormones into the blood stream. The blood, on its turn, carries the hormones to every part of the body. The sex hormones are estrogen and testosterone. Like all hormones, they are chemical messengers, substances produced in one part of the body that go on to tell other parts what to do.
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    There is no doubt that our sexual behavior is controlled by our brain. The brains of males and females are different and work differently when it comes to sex. But what exactly determines the difference in sexual behavior and traits between the genders? Sigmund Freud believed that sex drive is the most powerful motivating force in our lives.
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