The lesser splanchnic nerve is a nerve that arises from the thoracic spinal cord, specifically from the T10 and T11 spinal segments. It is part of the autonomic nervous system and primarily carries sympathetic fibers. This nerve plays a role in transmitting signals to the abdominal organs, influencing functions such as digestion and blood flow. The lesser splanchnic nerve typically innervates the kidneys and the adrenal glands, contributing to the regulation of various physiological processes. It connects with the celiac ganglion and the aorticorenal ganglion, facilitating communication between the central nervous system and the abdominal organs.