1. Four Phases of Physiological Responses - Masters & Johnson (1966) 1) Excitement 2) Plateau 3) Orgasm 4) Resolution ------------------------------------------------------------- Two underlying responses: 1) vasocongestion 2) myotonia

2. Three female patterns of sexual arousal

3. orgasm plateau excitement Typical male pattern of sexual arousal

4. Before Stimulation

5. ExcitementExcitement stage 1

6. PlateauPlateau stage 2

7. OrgasmOrgasm stage 3

8. Locating the “G-spot”

9. Brain during orgasm fMIR of FemaleBrainDuringOrgasm Oxygen levels in the blood correspond to the activity of different brain regions and are represented here on a spectrum from dark red (lowest) to yellow/white (highest). Almost the entire brain seems to be activated during orgasm.

10. Two stages of ejaculation: 1) emission 2) ejaculation proper

11. ResolutionResolution stage 4

12. Zibergeld & Ellison (1980) Five Component Model 1) Interest or desire 2) Arousal 3) Physiological readiness (vaginal lubrication/swelling & erection) 4) Orgasm 5) Satisfaction (how one evaluates or feels about what has occurred)

13. Whalen & Roth - Cognitive Model Perception of a sexual stimulus Positive evaluation Arousal Perception of arousal Positive evaluation Sexual behavior Perception of behavior Positive evaluation