The pelvic splanchnic nerve is one of the most important nerves in the human body responsible for the function of the pelvic organs. This nerve is sometimes referred to as the pelvic nerve, the hypogastric nerve, or the parasympathetic pelvic nerve. The term splanchnic refers to the sympathetic and parasympathetic nerve fibers that control the gastrointestinal tract, heart, liver, and other organs. Other synonyms for the pelvic splanchnic nerve include the nervi erigentes, pelvic autonomic nerves, or sacral parasympathetic nerves. Regardless of the term used to describe it, the pelvic splanchnic nerve is crucial for maintaining the normal functioning of the pelvic organs, including the bladder, rectum, and genitals.