Physiology of Sexual Response: Nutting

Question 1

The default sexual brain is what sex?

Answer 1

Female

Question 2

Where is the sexual CNS center?

Answer 2

Preoptic center of hypothalamus

Question 3

What are the neonatal influence on sex behavior?

Answer 3

Androgens=male tnedency

Question 4

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

Answer 4

Preoptic hypothalamic center in rats

Question 5

What is more important in humans than lower species?

Answer 5

Learned behavior is greater than hormonal control

Question 6

What is a surrogate?

Answer 6

Prostitute

Question 7

What is auto manipulation?

Answer 7

Masturbation

Question 8

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

Answer 8

Myotonia: increased muscle tension
Vasocongestion: increased blood flow

Question 9

What are the four stages of sexual response?

Answer 9

Excitement (Arousal)—Focus on sex
Plateau
Orgasm
Resolution

Question 10

What is the refractory period?

Answer 10

Man cannot achieve orgasm or erection

Question 11

What is different about female refractory period?

Answer 11

It is shorter: multiple orgasm

Question 12

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

Answer 12

Cowper’s glands

Neutralizes pH of male urethra

Question 13

What happens to testes in early phase?

Answer 13

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

Question 14

What ANS is responsible for erection?

Answer 14

Parasympathetic= POINT

Question 15

What ANS is responsible for ejeculation?

Answer 15

Sympathetic=SHOOT

Question 16

What are the nerves allowing for ANS stimulation of erectin?

Answer 16

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

Question 17

How much does blood flow increase in erection?

Answer 17

25-30 fold

Question 18

What stage of sleep do erection occur?

Answer 18

REM sleep

Question 19

What is the effect of tactile stimulation of the penis?

Answer 19

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

Question 20

How does viagra work?

Answer 20

inhibit phosphodiesterase to increase cGMP levels

Question 21

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

Answer 21

No

Question 22

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

Answer 22

Vasodilation! PNS

Question 23

Where is the erection center located in spinal cord?

Answer 23

S2-S4

Question 24

What muscles engorge with blood in erection?

Answer 24

Ischiocavernosus

Bulbospongiosis

Question 25

What is priapism?

Answer 25

Erection for more than 4 hours.

Question 26

Who was priapus?

Answer 26

Greek god of fertility who had a large and prominent erection

Question 27

Orgasm has what two phases?

Answer 27

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

Question 28

What contracts in emission?

Answer 28

``` Rhythmic contraction of: epidydimis vas deferens seminal vesicles prostate ```

Question 29

What contraction in ejaculation?

Answer 29

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

Question 30

What is retrograde ejaculation prevented by?

Answer 30

Urethral sphincters: internal and external

Question 31

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

Answer 31

Erection: S2=S4 Ejaculation: L1-L2

Question 32

Erection= | Ejaculation=

Answer 32

Erection=sacral | Ejaculation=lumbar

Question 33

How fast do rhythmic contractions occur?

Answer 33

0.8 second

Question 34

Are ANS pathways of ejaculation understood fully?

Answer 34

No... we have an idea but not fully

Question 35

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

Answer 35

Circumcised!

Question 36

What three things happen in sex to the female breast?

Answer 36

Nipple erection Swelling of breasts Sex flush

Question 37

What happens in female excitement phase?

Answer 37

Vaginal lubrication: not from glands

Question 38

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

Answer 38

Increased blood flow | Transudate across vagina

Question 39

What increases vaginal lubrication?

Answer 39

ESTROGEN: gels for old ladies

Question 40

What happens to vaginal size in arousal?

Answer 40

Wider Deeper NARROWING entrance

Question 41

What is not DIRECTLY stimulated for female orgasm?

Answer 41

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

Question 42

What contracts in female orgasm?

Answer 42

Vagina Uterus Rectal sphincter

Question 43

What does the cervix do in resolution phase of female?

Answer 43

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

Question 44

Semen loss is more in what group of women?

Answer 44

Women who have had children | Nulliparous women have less loss

Question 45

When are all sperm dead?

Answer 45

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

Question 46

How long do sperm take to get to fallopian tube?

Answer 46

5 minutes

Question 47

What is the problem with uterine contractions?

Answer 47

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

Question 48

What happens to BP/HR in orgasm?

Answer 48

EVERYTHING GOES UP Increased HR Increased Systolic Increased Diastolic Increased MAP

Question 49

What is released hormonally in orgasm?

Answer 49

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

Question 50

What other physiological effects occur in sexual response?

Answer 50

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

Question 51

What are the idiosyncrasies of physiology in high sexual excitement?

Answer 51

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

Question 52

What helps calms nerves before public speaking?

Answer 52

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