The pelvic splanchnic nerves are a group of nerves that originate from the sacral region of the spinal cord, specifically from the S2 to S4 segments. They are part of the autonomic nervous system and primarily carry parasympathetic fibers. These nerves play a crucial role in innervating the pelvic organs, including the bladder, rectum, and reproductive organs. In addition to providing parasympathetic innervation, the pelvic splanchnic nerves also contribute to the regulation of various functions such as urination and sexual arousal. They help facilitate the contraction of smooth muscles in these organs, promoting proper physiological responses during different activities.