1. The blood transport system and blood supply of the penis
The supply of penile blood vessels and blood flow occupies an extremely important position in the penile erection mechanism, because the essence of penile erection is the blood vessel congestion. These blood transport systems are wrong, which will of course cause poor penile erection.In addition, dynamic vein traffic support can be caused when it is erected.
The penis is like a surprising natural hydraulic mechanical device. The physiological reactions of erection and fading are manifested as a huge change in the flowing and flowing blood dynamics of an organ under a certain capacity.According to the size of the penis, the increase in blood volume during erection is about 80-200 ml.When the penis is erected, the internal arteries of the penis are expanded, and the blood flow to enter the penis is 8 times larger than when it is relaxed.When it reaches 120 ml/minute (the internal voltage of the sponge is increased to about 75 mm Hg), it causes erection, and once the erection blood flow to maintain an erection only requires about 60%of the original irrigation rate, or 70 ml/min.
Second, sound nerve reflex
Penile erection is a reflection. The stimulation and conditional reflex stimulation of the nerve endings from many sensors can cause penile erection reflection.The nerve components participating in the control of the erectile function include the structure of the upper to the cerebral cortex, the lower to the penile vessel wall nerve muscle terminal at all levels.
Such as the cerebral cortex, there is a sexual function center; the brain, the hypothalamus, and the subcortic center; the lumbosacral region has an erection A and ejaculation center in the spinal cord, but the chest and waist and the center of the salamander also have a synergistic effect.The spinal centers are associated with the sensory nerves and the genitals.
Sexual excitement from acquired conditions from the cerebral cortex can spread to the penile erection caused by the cub and spinal centers under the cortex, called a psychological erectile.The erectile erection formed after the excitement of the erectile center is reflected in the stimulation of the penis, which is called a reflective erection.Both erectiles are issued by the erectile center of the spinal cord, and this instruction is passed and revoked through nerves.
Third, normal endocrine function
Astormance promotes the differentiation and development of fetal sex organs. More importantly, it is one of the key factors of sexual excitement and erection after adolescence.If therogens are deficient due to the disease, the patient loses the ability of the penis to erection and causes impotence. When the exogenous androgens are supplemented, the erectile ability can be restored, which shows the key role of therogens in the erectile.Although the androgen does not directly irritate the center, it can improve the excitement of the sex center and maintain a certain response ability, but how therogens affect the adult sensory nerves that have not been studied.
The production of testosterone is regulated by the brain and hypothalamus.The brain is also a target organ for sex hormones.The malignant stimulus in human mental factors can interfere and affect the endocrine regulatory center of the hypothalamus through the advanced nerve center, which makes the male hormone level that maintains male sexual function in the human blood circulation is often in an imbalance. This is also the cause of mental impotence.one.
When people notice that the level of testosterone is significantly low, it is often accompanied by low sexual desire and impotence, and the symptoms of testosterone can be relieved after supplementing testosterone.But the exact relationship between hormones and sexual behavior is still unclear.
Fourth, normal anatomy structure
The normal physiological anatomy structure of the penis is the material basis of its erectile material.If it is genetic or hormone levels, external genitals are developing, severe penis, testicular fibrosis, testicular malformations, severe testicular trauma or resection, etc., the penis cannot be erected.
In the case of severe phimosis, severe cable veins, scrotum sheath effusion, and scrotal psychic enlarged, the influence of psychological and physical reasons can also affect the yin Barbuilding mechanism.In addition, if an adult man with malformations of the external genitalia, the fear of sexual performance of sexuality, consciously avoid sexual life, will cause impotence in the long run.
(Editor in charge: Internship Yao Yalin)
