| androgens | Hormones that promote the development of male or malelike sexual structures and characteristics. 88, 126, 202
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| anorgasmic | Never having had an orgasm. 223
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| arousal disorder | A recurrent inability to attain or maintain vaginal lubrication. 222
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| autonomic nervous system | The part of the nervous system that controls involuntary body functions, including glands, involuntary muscles, and the heart. 202
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| carpopedal spasms | Contractions of the muscles of the hands and feet during sexual arousal. 206
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| castration | Removal of the testicles. 202
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| cerebral cortex | A part of the brain involved in thinking, memory, and language. 200
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| detumescence | The subsiding of tumescence (swelling). 202
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| dyspareunia | Recurrent genital pain occurring before, during, or after sexual intercourse. 225
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| ejaculation | The emission and expulsion of semen from the erect penis. 122, 209
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| ejaculatory inevitability | The point at which ejaculation must occur. 210
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| emission | The discharge of seminal fluid from the accessory glands and filling of the urethral bulb; the first phase of ejaculation. 122, 209
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| episiotomy | An incision made in the perineum during childbirth to enlarge the vaginal opening to ease delivery. 227, 426
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| erectile disorder | A recurrent inability to attain or maintain an erection. 221
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| expulsion | The second phase of ejaculation in which semen is expelled from the penis. 122, 209
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| Grafenberg spot (G spot) | A sensitive area on anterior (front) wall of vagina in some women. 215
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| hypertension | An elevated blood pressure, as can occur during sexual arousal and response. 208
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| hyperventilation | Rapid breathing, as can occur during sexual arousal and response. 208
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| hypoactive sex desire disorder | The deficiency or absence of sexual fantasies and desires for sexual activity. 217
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| libido | The sex drive. 202
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| limbic system | A group of structures in the brain involved with emotions and motivation. 200
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| myotonia | Muscle tension. 204
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| orgasm | The peak, or climax, of sexual arousal and response; characterized by a series of highly pleasurable muscular contractions of the pelvic floor and the sudden discharge of accumulated sexual tensions, and, in males, ejaculation. 123, 207
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| orgasmic disorder | Delayed or absent orgasm after a normal excitement phase. 223
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| orgasmic platform | The narrowing of part of the vagina during sexual arousal due to vasocongestion. 206
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| performance anxiety | Worries about being able to "perform" sexually. 221
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| plateau phase | The second phase of Masters and Johnson's sexual response cycle, the phase of sustained sexual arousal. 205
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| premature ejaculation | An ejaculation that occurs sooner than one or both partners desire it. 224
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| refractory period | The period of time following an ejaculation during which a man cannot have an erection or an orgasm. 212
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| resolution phase | The phase of the sexual response cycle in which loss of sexual arousal occurs; the fourth phase of Masters and Johnson's sexual response cycle. 211
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| sensate focus | A treatment for sexual difficulties that involves focusing on sensations of touch. 219
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| sex flush | A temporary reddish color of the skin resulting from sexual excitement. 205
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| sexual aversion | A feeling of revulsion toward sexual activity. 218
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| sexual dysfunctions | Sexual disturbances that interfere with a full or complete sexual response cycle. 217
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| sexual response cycle (SRC) | The cycle of sexual arousal and response. 202
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| spectatoring | A psychological process in which a person becomes a "spectator" to his or her own sexual performance; occurs in some sexual dysfunctions. 213
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| squeeze technique | A way of treating premature ejaculation. The man's partner squeezes the penis at the frenulum until the urge to ejaculate is lost. 225
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| start-stop technique | A way of treating premature ejaculation by stimulating the penis almost to orgasm, then allowing the erection to subside. 225
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| transudate | A plasma fluid. 204
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| tumescence | Swelling, such as that caused by vasocongestion. 202
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| vaginismus | Involuntary muscle spasms of the lower third of the vaginal canal that prevent penile penetration. 226
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| vasocongestion | The filling of blood vessels, such as those in erectile tissue, in response to sexual arousal. 204
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2002 McGraw-Hill Higher Education