6 Sexual Responce Cycle Male

4 Phases
Excitement
Plateau
Orgasmic
Resolution
Testosterone is responsible for sex drive in both
Women
Men
Both
Coitus (coitio)
Coming together
Sexual intercourse
Copulation
Intromission- introduction of an erect penis into a vagina
Orgasm for one or both persons
Explosive release of semen by the male
Male Responses • Excitement
Testes
Blood vessels of the corpus cavernosa and spongiosum dilate
Erection is driven by the
Vasocongests
Cremaster muscel
Widens
Sex flush
To vessels in corpus cavernosa and spongeoum to release nitric oxide
Erection begins
Parasympathetic nervous system
Scrotal skin
contracts
Nipples become
Penis tumescence; increase in length and diameter
Vasocongestion
Elevate
Reflex can be activated by
(50-60% of men)-Skin vasodilatation response
Parasympathetic nerves communicate to
Thigh stroke
Urethral opening
Erect (60% of men)
Plateau
Erection
Enlarges
Prostate
Spreads
Sex flush
Enlarges (3X)
Preorgasmic emission
Maintained; Color deepens
HR, BP, and BR
Bulbourethral gland releases fluid (pre ejaculatory fluid) OR • A few drops of semen
Urethral bulb
increase, more myotonia
!!Orgasm!!
Loss of
Contract-Clutching and clawing of hands and fee
Loss of
Return to resting state
Reflex with 2 Phases
Peak
Reflex with 2 Phases
Expulsion state » Controlled by somatic nervous system (voluntary control) » Rhythmic contractions of penis and pelvic floor muscles » 3-4 contractions every 0.8 sec
Sex flush
Emission stage- Controlled by sympathetic nervous system » Smooth muscle contraction in testes walls, ducts and glands » Urinary sphincter contracts closes off bladder » Oxytocin release
Vasocongestion dissipates
Myotonia
Involuntary skeletal muscle
Penis arteries constrict – 50% of size is lost rapidly
Resolution
Sex flush
HR, BP, and BR
Peaks
Time in Refractory
Dry Orgasm
Semen enters bladder
Coitus Reservatus
Learned control • No expulsion phase
Retrograde ejaculation
No Ejaculation
Minutes to hours
Influenced by fatigue and stimuli
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