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Human Sexual Response Cycle
Transcript of Human Sexual Response Cycle
It's been AMAZING working so closely with all of you, and I am so glad to have been placed in this group :)
Hope you all have a wonderful break!
Lynne, Josh, David, Micha, Christel, Liz, Sara
C3, Drexel University College of Medicine
Philadelphia, PA 19144
designed by Péter Puklus for Prezi
What is the Sexual Response Cycle (SRC)?
The Four Stages of SRC
Phase 1: Excitement
Can last from a few minutes to several hours
Increased muscle tension
Increased HR and RR
Nipples become hardened or erect
Increased blood flow to genitals
swelling of clitoris/labia minora and erection of penis
Vaginal lubrication begins
Woman's vaginal walls and breasts swell
Man's testicles swell, scrotum tightens, begins secreting lubricating liquid
Phase 2: Plateau
Extends right up until the point of orgasm
INTENSIFIED phase 1 characteristics
HR, RR, BP, muscle tension
Muscle spasms in feet, face, and hands
Continued swelling of vagina
(vaginal walls often turn a darkish purple)
Clitoris becomes highly sensitive to touch and retracts under the clitoral hood to avoid direct penis stimulation
Testicles withdrawn up to scrotum
Phase 3: Orgasm
Climax of the sexual response cycle; shortest phase and lasts only a few seconds usually
Involuntary muscle contractions
BP, HR, RR are at the HIGHEST RATE
RAPID intake of 02
Feet muscles spasm
Sudden, forceful release of sexual tension
WOMEN: muscles of vagina contract, and uterus undergoes rhythmic contractions
MEN: rhythmic contractions of muscles at the base of the penis = ejactulation
"Sex Flush" (rash)
The sexual response cycle is the sequence of physical and emotional changes that occur with sexual arousal and participation in sexual activities (masturbation, intercourse, etc)
Traditionally, a four-stage model of physiological responses to sexual stimulation
Proposed in 1966 by William H. Masters and Virginia E. Johnson
4. Resolution (refractory for men)
Both men and women will progress through these stages, although the timing is usually different
i.e. reaching orgasm at the same time!!
The intensity and time spent in each phase can also be different
The Four Stages
Phase 4: Resolution
According to Dr. Goldman:
The female urethra contains transitional epithelium AND minimally keratinized stratified squamous epithelium.
Recall that the male urethra has:
-strat. columnar (membranous and penile)
-M.K. stratified squamous (penile)
JUST TO CLEAR THINGS UP A BIT FROM LAST TIME
Body slowly returns to normal level of functioning (and size/color!)
Marked by general sense of well-being, enhanced intimacy, and not surprisingly, fatigue!
Women: more capable of rapid return to the orgasm phase with further sexual stimulation (multiple orgasms)
Men: need recovery time (refractory period) before they can reach orgasm again
lengthens with age
RIDDLE: What would you call the SRC phase that follows an orgasm that occured at 12:00 AM on the first day of January?
Answer: _ _ _ _ _ _ _ ' _ _ _ _ _ _ _ _ _ _ _ !
Body prepares for sexual intercourse
Mental or physical erotic stimuli
kissing, petting, rubbing, erotic images/videos
Noted Criticisms of Masters and Johnson's SRC Model:
First signs of physiological arousal in women may be increased blood flow to vagina, and not lubrication.
Masters and Johnson theorized that male pleasure is directly related to amount of ejaculate released, whereas research shows that the force of the release matters more.
Men are capable of having multiple orgasms
Parameters defined physiologically, although sexual phases have been shown to be associated with emotional states as well.