The principles of male ejaculation

Male friends will have a nervous excitement reaction when they ejaculate. This is a very normal phenomenon. Most of them are caused by brain reflex activities. Even if it occurs, don’t be too surprised, let alone cause any psychological burden. Once the burden occurs, it will cause great harm to your body, and even affect your normal reaction when ejaculating.

In the first step of ejaculation, impulses from sympathetic nerves cause the smooth muscles of the vas deferens and seminal vesicles to contract, thereby moving the semen in the vas deferens and seminal vesicles to the urethra.； The second step uses the outgoing impulse of the pudendal nerve to contract the striated muscles at the root of the corpus cavernosum of the penis, thereby ejecting the semen from the urethra. The excitement of the high-level parts of the brain also affects the erection center and ejaculation center of the spinal cord through the descending pathway. Normal sexual arousal stimulation comes from various sense organs and affects spinal cord reflex activity through the brain.

Ejaculation is a complex process that includes erection, ejaculation, ejaculation and orgasm. Erection is due to swelling and hardening of the penis, and its primary innervation comes from the sacral plexus and pelvic splanchnic nerves or erectile nerves. Emission involves collecting semen before ejaculation and transporting it to the prostatic part of the urethra, which becomes a semen reservoir as the bladder neck and distal urethral sphincter close. This induces ejaculation, the rhythmic ejaculation of semen through the urethra, a process in which the participation of perineal skeletal muscles is essential.

The neurophysiology of ejaculation is only partially understood. Research shows that the dopaminergic system promotes ejaculation while the serotonin-activating system inhibits ejaculation. The main neural mechanism of ejaculation is the innervation of the body, but also includes the nerves and fibers of the vagina from the autonomic nervous system. ； The autonomic branch of the parasympathetic nervous system primarily controls erectile function while the sympathetic and somatic branches primarily control firing and ejaculation.