Physiology of Sexual Response: Nutting Flashcards Preview

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Flashcards in Physiology of Sexual Response: Nutting Deck (52):
1

The default sexual brain is what sex?

Female

2

Where is the sexual CNS center?

Preoptic center of hypothalamus

3

What are the neonatal influence on sex behavior?

Androgens=male tnedency

4

A lesion in what CNS region makes no sex behavior regardless of hormones given?

Preoptic hypothalamic center in rats

5

What is more important in humans than lower species?

Learned behavior is greater than hormonal control

6

What is a surrogate?

Prostitute

7

What is auto manipulation?

Masturbation

8

KEY SLIDE: What are the two main physiological responses in both genders?

Myotonia: increased muscle tension
Vasocongestion: increased blood flow

9

What are the four stages of sexual response?

Excitement (Arousal)---Focus on sex
Plateau
Orgasm
Resolution

10

What is the refractory period?

Man cannot achieve orgasm or erection

11

What is different about female refractory period?

It is shorter: multiple orgasm

12

What is the secretion in the excitement stage of male arousal? Where from and why?

Cowper's glands
Neutralizes pH of male urethra

13

What happens to testes in early phase?

Testes drawn up by cremaster
Protect from getting smushed
Happens before orgasm

14

What ANS is responsible for erection?

Parasympathetic= POINT

15

What ANS is responsible for ejeculation?

Sympathetic=SHOOT

16

What are the nerves allowing for ANS stimulation of erectin?

S2/S4
Outflow of pelvis PNS: increases NOS activity: increased NO: increased cGMP: smooth muscle relaxation: vasodilation: increased blood flow and congestion

17

How much does blood flow increase in erection?

25-30 fold

18

What stage of sleep do erection occur?

REM sleep

19

What is the effect of tactile stimulation of the penis?

Goes back to spinal cord
PNS loop activated
Some SNS constriction
Arterioles dilate
Erection

20

How does viagra work?

inhibit phosphodiesterase to increase cGMP levels

21

Is there a correlation between length of flaccid penis and erect penis length?

No

22

Which is more important to erection: vasodilation or venous constriction?

Vasodilation! PNS

23

Where is the erection center located in spinal cord?

S2-S4

24

What muscles engorge with blood in erection?

Ischiocavernosus
Bulbospongiosis

25

What is priapism?

Erection for more than 4 hours.

26

Who was priapus?

Greek god of fertility who had a large and prominent erection

27

Orgasm has what two phases?

Emission: semen enters erethra
Ejaculation: contraction of urethral smooth muscle

28

What contracts in emission?

Rhythmic contraction of:
epidydimis
vas deferens
seminal vesicles
prostate

29

What contraction in ejaculation?

Via pudendal nerves:
Bulbocavernosus
Ischiocavernosis
Perineal
Urethra
Urethral Sphincters: prevent back flow

30

What is retrograde ejaculation prevented by?

Urethral sphincters: internal and external

31

Erection is controlled by what spinal segments? Ejaculation is coordinated in what spinal segments?

Erection: S2=S4
Ejaculation: L1-L2

32

Erection=
Ejaculation=

Erection=sacral
Ejaculation=lumbar

33

How fast do rhythmic contractions occur?

0.8 second

34

Are ANS pathways of ejaculation understood fully?

No... we have an idea but not fully

35

What is more attractive to a woman, uncircumcised or circumcised flaccid penis?

Circumcised!

36

What three things happen in sex to the female breast?

Nipple erection
Swelling of breasts
Sex flush

37

What happens in female excitement phase?

Vaginal lubrication: not from glands

38

Where is the lubriaction of vagina in female excitement phase from?

Increased blood flow
Transudate across vagina

39

What increases vaginal lubrication?

ESTROGEN: gels for old ladies

40

What happens to vaginal size in arousal?

Wider
Deeper
NARROWING entrance

41

What is not DIRECTLY stimulated for female orgasm?

Clitoris... women would rather drag labia and mons over it than touch it directly

42

What contracts in female orgasm?

Vagina
Uterus
Rectal sphincter

43

What does the cervix do in resolution phase of female?

Contractions continue, but are weak and infrequent
Cervix dips into pool of semen at end of vagina

44

Semen loss is more in what group of women?

Women who have had children
Nulliparous women have less loss

45

When are all sperm dead?

10 hours after
8 hours 6%
4-6 50%

46

How long do sperm take to get to fallopian tube?

5 minutes

47

What is the problem with uterine contractions?

Most activities seem to push semen away from the egg at the top of the oviduct... huh

Uterine
Oviduct
Ciliary

48

What happens to BP/HR in orgasm?

EVERYTHING GOES UP

Increased HR
Increased Systolic
Increased Diastolic
Increased MAP

49

What is released hormonally in orgasm?

Oxytocin... people ar trying to make oxytocin sprays to increase couples bonding

50

What other physiological effects occur in sexual response?

Increaesd:
respiration: may hold breath in orgasm
Sweating: after orgasm

51

What are the idiosyncrasies of physiology in high sexual excitement?

Decreased bleeding from cuts... more blood to genitals?

Relief from allergies

Increased coordination in spasticity patients

Decreased sensation of PAIN at orgasm

Less gag reflex

52

What helps calms nerves before public speaking?

Sex... keep in mind when public speaking is in the future
-Dr. Nutting