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Chapter 12

PSYC 365 Chapter Notes - Chapter 12: Myotonia, Vasocongestion, Bulbospongiosus Muscle

Course Code
PSYC 365

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Chapter 12: Female Sexuality
Textbook Notes
-Masters and Johnson (1966)
-Sexual response occurs in 4 phases:
1) Excitement
-Vasocongestion = accumulation of blood vessels in a region of the body,
especially the genitals; swelling/erection results
-Primary response in females
-Myotonia = muscle contraction
-Vagina moistens with lubricating fluid; males = erection of penis
-Clitoris = most sexually sensitive organ in female body
2) Plateau phase
-Tightening of bulbospongiosus muscle
-Upper portion of vagina expands
-Increase in pulse, HR, and blood pressure
3) Orgasm = series of rhythmic contractions of muscles circling vaginal entrance
-Intensely pleasurable sensation
4) Resolution phase
-Excitement processes are reversed
-Release of muscular tensions throughout body
-Could take 30 minutes or more
-Criticisms of Masters and Johnson’s work
-Focuses only on physiological processes, not cognition
-Alternative Models
-Triphasic model = three components to sexual response sexual desire,
vasocongestion, myotonia (Kaplan, 1979)
-Dual control model = two processes underlie human sexual response excitation and
inhibition) (Bancroft, 2009)
-Belief that inhibition is adaptive across species
-Sexual arousal can be dangerous/disadvantageous
-Most people fall in the moderate range
-Developed excitation and inhibition scales
-Early learning and culture = critical factors in determining excitation and
Common Myths
-Freud believed two kinds of orgasms: clitoral and vaginal
-Girls must transfer focus of sexual response from clitoris to vagina
-Masters and Johnson fact: only one type of orgasm
-Women only experience one orgasm followed by refractory period
-Women can have multiple orgasms (Kinsey, 1953)
-Most usually achieve multiple orgasms through masturbation
-Women’s sexual desire disappears by the age of 60; ceases at menopause
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