PSY398H5 Study Guide - Final Guide: Precocial, Fetus, Platypus

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Behavior used to gain access to females. Communicates how good a mate the male is. 3 components: mounting assuming a copulatory position, intromission penis enters vagina, ejaculation expulsion of semen. Necessary for the initiation of all consummatory behaviours. Castration abolishes (mie) but reintro of test helps reverse effects in both recent and long term castrates. Test increase after unattainable female and after copulation. Test decrease after exposer to ethano, neonatel treatment with an anti-estrogen result in impairment of sexual behavior. Reduced performance (longer time to mount/lose ejaculation then intromission then. Bigger effect if t is maintained rather than restored. Test, androstendione, estradiol = aromatized to estro/ used to maintain sexual behavior. | (5-a reductase) | cortisol oestradiol (in ovaries) Olfactory bulb (ob) -> nucleus accumbens (nac) - > medial pre-optic area (mpoa) -> amygdala (amy) ->vta (ventral tegmental area) Maybe due to dopamine since sensory cues from female release dopamine in mpoa. T implantation increases copulation as, well as e.

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