Basic ways to achieve its regulatory function of the nervous system is reflex activity. For example, hand touch to has water pot immediately on shrink back has, this a process we called reflection, reflection activities of completed need has neural pathway, neural pathway also can called reflection arc, reflex arc is by feel device, incoming neural, Central, outgoing neural, effect device five part composition, like front by lift of example in the, hand of skin is feel device, touch to water produced hot of feel, this a feel incoming neural arrived nerve center--cerebral cortex, Central issued escape command, through outgoing neural knife up effect device-- Arm muscles, muscle contraction, drew back his hand. Although this process involves five parts, but due to the rapid nerve conduction, so that a continuous action is done in a Flash.
Of course, this is a relatively simple reflection activities, activities for is the need to mobilize the body many not participate in reflex activity, so the process is much more complex, but the basic principle is the same. Neural regulation of visceral activities institutions collectively post the nervous system, consists of two parts: the sympathetic and parasympathetic nervous. Most organ recipients of sympathetic and parasympathetic innervation double, and two types of nerve function to the same organs is often the opposite. For example, parasympathetic nervous excitement, can contract the Detrusor of bladder, bladder sphincter relaxation, prompted voiding. And sympathetic to bladder Detrusor relaxation, bladder sphincter, inhibit micturition.
Control the levels of neural activity centers, primary central nervous system regulating plant function in the spinal cord. Reflection of some of the most basic human activities can be accomplished within the spinal cord, such as vascular tone reflective, sweat reflecting, micturition reflex, defecation reflex, erectile reflex. The human brain is regulating plant function of senior centers. However if senior center was damaged, the somatic motor function will be severely affected, influence sexual function can be regulated by certain plants, lost the ability to fine tune.
The beginning of 20th century, Pavlov, science experiments, creation of the theory of higher nervous activity. Basic way of higher nervous activity is mainly conditioned reflex, it is one of the advanced skills of the brain. Impulse was acquired during the development process.
Regulation of autonomic nerve on human sexual activities appears penile erection, ejaculation, and narrowing of the vagina, vaginal fluid leakage increased involuntary pelvic muscle shrinkage and a series of changes. And these activities are the spinal cord of primary central nervous system and the dual control of the higher centers of the brain. Animal sex is a conditioned reflex, when hormonal changes after estrus, who meet with the opposite sex, mating occurs immediately.
But people's sexual activities with both the first role of the signal system, also have the role of second signal system. Not only after stimulated by specific images of the opposite sex will produce sexual excitement and after accepting the text of abstract to stimulate sexual response. The other hand, has a strong effect on human brain activity, human sexual desire does not immediately translate into sexual activity.
By masturbation and penis produce erections, does not need to go through the brain, and junior Center-spinal cord reflex activity of the control through visual stimulation and erection is non-flesh must pass the higher centers of the brain. In the neural regulation of sexual activity, gender differences between men and women: men in the event of the second signal system appeared to more than women, a strong reaction to all kinds of signals, but women need love – pure stimulation of physical contact, in order to achieve sexual arousal.
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