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Psych 103

Psych 103 -- Brain and Behavior

lordosis reflex arching of female when sexually receptive to male
aphrodisiac substance that stimulates sexual desire in males
4 characteristics relating to sexual behavior in male rats 1) Mounts 2) Intromissions 3) Ejaculation 4) Refractory Period *refractory period gets longer after each mounting round
coolidge effect when a sexually exhausted male has another bout of mounting if the current female rat is switched out for another
refractory period post-ejaculation "resting time" before another bout of mounting occurs. *refractory period gets longer after each mounting round until male becomes sexually exhausted
What two male organs that atrophy after castration? Why? Seminal vesicles and the prostate gland. They are sensitive to testosterone levels.
What is the effect of removing testes? Why? Males stop mating. They are lacking testosterone.
What happens when a castrated male is given testosterone? The males begin mating again.
What did they do? [1973 Phoenix, Slob, Goy (Rhesus Monkeys)] Compared the percent of sexual activity in sham operated males versus castrated males. Then injected the males with testosterone daily for replacement therapy.
Why did they do it? [1973 Phoenix, Slob, Goy (Male Rhesus Monkeys)] To find the effect testosterone had on mating activity
What did they find? [1973 Phoenix, Slob, Goy (Rhesus Monkeys)] Castrated males had a decrease in sexual activity. But, replacement therapy caused an increase in mating.
What did they conclude? [1973 Phoenix, Slob, Goy (Rhesus Monkeys)] Testosterone is essential for the presence of mating activity.
What did they do? [1979 Davidson (Hypogonadal Human Males)] Compared both the mean number of erections per week and mean number of sexual thoughts per day of hypogonadal men after an injection of a placebo, 100mg dose of testosterone, or 400mg dose of testosterone.
Why did they do it? [1979 Davidson (Hypogonadal Human Males)] To find the effect of testosterone on erections and sexual thoughts
What did they find? [1979 Davidson (Hypogonadal Human Males)] The mean number of erections and sexual thoughts increases as the dosage of the testosterone increased
What did they conclude? [1979 Davidson (Hypogonadal Human Males)] Normal levels of sexual activity is dependent on adequate levels of testosterone
Where in the brain is testosterone working? Medial Pre-Optic Area/Anterior Hypothalamus (MPA/AH or MPOAH or MPN)
What did they do? [1966 Heimer and Larsson (Male Rats)] Created bilateral lesions of the MPA/AH
Why did they do it [1966 Heimer and Larsson (Male Rats)] To find the relationship between mating and the MPA/AH
What did they find? [1966 Heimer and Larsson (Male Rats)] Bilateral lesions of the MPA/AH eliminated mating (even if they were injected with testosterone)
What did they conclude? [1966 Heimer and Larsson (Male Rats)] MPA/AH is where testosterone activates mating behavior
What did they do? [1966 Davidson (Male Rats)] Implanted 220mg of testosterone pellets into the MPA/AH of castrated males
Why did they do it? [1966 Davidson (Male Rats)] To find the relationship between mating behavior and the MPA/AH of castrated males
What did they find? [1966 Davidson (Male Rats)] Mating behavior was restored in castrated male rats after the implant of the testosterone pellets into the MPA/AH
What did they conclude? [1966 Davidson (Male Rats)] MPA/AH is where testosterone activates mating behavior
Created by: clari.nellie
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