Physiology of Emission, Ejaculation, & Orgasm
Different mechanisms are involved in erection, emission, ejaculation, and orgasm, and these events can be dissociated from one another (eg, a frequent complaint of impotent patients is ejaculating through a “limp penis"). Except for nocturnal emissions, or “wet dreams,” emission and ejaculation require stimulation of the external genitalia. Impulses traveling from the pudendal nerves reach the upper lumbar spinal sympathetic nuclei.
