IVY CHEN, MPH
Lecturer, ivychen@berkeley.edu
IB 140: Human
Sexuality & Reproduction
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Diagrams from
Lecture: Sexual Response |
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For all models below: x-axis should be time, y-axis should be relative intensity Helen Singer Kaplan’s Sexual Response Model
Masters
& Johnson 4 Phase Model •1.Excitement: muscle tension, some increase in heart rate &
blood pressure, areas of the body become engorged. May result in a sex flush – a pink or
red rash on the chest and face. •2.Plateau: sexual tension continues to build, last a
few seconds to a few minutes • •3.Orgasm: Peak of sexual arousal, release of physical,
emotional and psychological build-up. male – usually equivalent to ejaculation. •4.Resolution: a return to unaroused state. –**
Males only – Refractory period, he is unable to have a 2nd
erection or ejaculation, allows his glands to refill.
Masters & Johnson’s sexual response model
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