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Psych 103
Psych 103 -- Brain and Behavior
Question | Answer |
---|---|
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 |