What happens in the Body?
Phases of Sexual Response Cycle
In the 60s, two American researchers Masters and Johnson set up a lab
where they could scientifically research body changes during
intercourse human. Had the support of many volunteers who were willing
to have sexual activity monitored by the laboratory apparatus designed
to detect, for example, changes in color and warmth of the vagina
during self-stimulation.
These researchers came to a pattern of sexual response for men and
women, whom they called Human Sexual Response Cycle. Initially, this
cycle was composed of four different phases: Excitement, Plateau,
Orgasm and Resolution. Later, a psychiatrist named Helen Singer Kaplan
complemented this cycle with a first stage, not mentioned by Masters
and Johnson - Sexual Desire. Today, the Human Sexual Response Cycle
consists of three phases: desire, arousal and orgasm.
DESIRE
This is the Sexual Stage, where the instincts are encouraged and appetites grow. The desire, or sensuality, is a subjective experience that encourages people to seek sexual activity. In brain, there are neurophysiological messages that motivate the search for sex. These neurological signs have not been well explained, but there is talk in some sort of center of Sexual Desire in the Brain, which would consist primarily of a small brain region called the Cloister. In women, especially smell and touch, are very responsible for the increase in sexual desire.
EXCITATION
The Second Phase of the Sexual Cycle occurs when the body starts to respond physiologically to stimuli that front shot sexual desire. That is, the excitement is the body's response to desire. In women, the excitement is demarcated by producing a secretion responsible for vaginal lubrication. Two physiological changes are the main protagonists in this phase. The vascular congestion, which is increasing the amount of superficial blood and / or deep accumulated in some organs of the female genital tract and extragenital and myotonia, which is growing and involuntary contraction of muscle fibers.
But the female sexual response will not appear on the genitals. She is a continuum of the whole body in response to stimuli. Appears in the breasts (breasts) with a small increase in its size and the erection of the nipples. There is also a sex flush, when the skin is red, and both blood pressure as the heart and respiratory rates tend to increase. Muscle contractions occur in organs close to the genitals, such as the rectum (anal area), the urethra and bladder.
The female genital system itself consists of external and internal organs, which are: the clitoris, labia, vagina and uterus. All these bodies will suffer the same physiological changes of vasocongestion and myotonia. Both the clitoris, the small and large lips increase in size, becoming swollen and red. Retract the labia of the vagina leaving the entrance free. The clitoris is protected under a foreskin (skin) and the vagina begins to produce a secretion similar to saliva by a phenomenon similar to transudation (a kind of sweat vaginal wall, many mistakenly believe to be female ejaculation). There is feeling of muscle contraction such irregular internal organs.
ORGASM
This is the last phase of sexual response cycle. The orgasm, ecstasy, enjoyment or pleasure climax occurs when a release of all the sexual tension built up. In the deep vasocongestion the clitoris, small and big lips and the lower third of the vagina called orgasmic platform. There may be a prolonged muscle contraction and spasticity of 4 to 5 seconds in this region occur before the orgasmic discharge. The orgasm happens: there is a burst of rhythmic contractions and involuntary orgasmic platform at a frequency of about 12 times every 0.8 seconds. The interesting thing is that the woman, shortly thereafter, can be stimulated again and have more than one orgasm. This ability multiorgásmica woman is not found in men who need a break after ejaculation to start another cycle of sexual response (time called Refractory Period).
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