Chapter 5 Flashcards
(71 cards)
when is male sex drive expressed?
male sex drive is expressed after puberty
male sex drive is expressed after puberty, this timing suggests that:
testes involved in sexual motivation
Indeed they are: remove testes in adulthood: no more sexual behaviour
are testes involved in sexual motivation?
yes
Remove testes in adulthood, what happens?
No more sexual behaviour (dramatically decreases) – indeed testes involved in sexual motivation
remove testes in adulthood, then androgen treatment: what happens?
sexual behaviour/motivation will recover
hormones cause behaviour?
no- hormones dont cause behaviour they change the probability
Hormones and experience interact to affect
behavior
Male sexual behavior involves 2 phases:
- Appetitive phase (Seeking)
- Consummatory phase (Acting)
males spend majority of their time in:
appetitive phase
Copulation takes place in which two phases of male sexual behaviour
copulation takes place in the consummatory phase
hormones impact what phases of male sexual behaviour
impact both phases
What are the three components of the consummatory phase
- Mounting
2.Intromission
3.Ejaculation
describe mounting (1/3) component of consummatory phase
Male is hovering behind female: female needs to be in lordosis position (arching back): allowing mounting, mounting is not intermission: penis not inside vagina: male hovering over female and is grabbing her by the flanks
After ejaculation, male
ignores female
The time btw ejaculation and next copulatory series is called
post-ejaculatory interval (PEI)
PEI composed of 2 periods
absolute and relative refractory phase
absolutory refractory phase of PEI:
no other way male will engage in copulatory behaviour with anyone
reflexive refractory phase
male might engage in copulatory behaviour if stimulus strong enough (ex: novel female)
Coolidge Effect
Following copulation, male will not engage in copulating behaviour with the female they just mounted but might copulate with a novel female
3 components of consummatory phase: mounting, intermission and ejaculation do not disappear all at same time when you castrate
: first thing to disappear 1) ejaculation 2)intromission and lastly mounting disappears
3 components of consummatory phase: mounting, intermission and ejaculation do not disappear all at same time when you castrate: first thing to disappear 1) ejaculation 2)intromission and lastly mounting disappears
Once you start androgen treatment it is :
the mirror effect: mounting reappears first, then intromission and lastly ejaculation
the three components of the consummatory phase (mounting, intromission, ejaculation) do not dissapear and reappear at the same time (when remove androgen and when start retreating with androgens), what this is telling us is:
each of these components of the consummatory phase has different sensitivity to androgens
During organization of the CNS in males it is __ that is masculinizing**
testosterone being converted into estrogen
in rodents, since testosterone (an androgen) is being converted to estradiol (an estrogen), can we assume estrogen is the single important thing?
estrogen in regards to copulatory behaviour in adulthood is important but it is not estrogen alone: we know this because if u treat castrated males with testosterone or androstenione you can recover overall sexual mating behaviour in the males
If instead you treat males with DHT you dont recover male sexual behaviour (DHT cant be converted into estradiol)
DHT on its own can no recover sexual behaviour