The term "nervus splanchnicus major" refers to a complex network of nerves in the human body that primarily innervates the internal organs. Synonyms for this anatomical structure include "major splanchnic nerve" and "primary visceral nerve". It plays a crucial role in regulating various bodily functions, such as digestion and blood vessel constriction. This nerve bundle originates from the sympathetic ganglia in the thoracic region and extends towards the abdominal cavity, where it branches out to supply a wide range of organs. Its alternative names provide clarity and facilitate effective communication among medical professionals when discussing its functions and clinical implications.