The MonroRichter line, also referred to as the Monro-Kellie doctrine or the Monro's line, signifies a critical anatomical boundary within the human skull. Named after the Scottish surgeon Alexander Monro and the German physician Friedrich Wilhelm von Richter, this line demarcates the separation between the supratentorial and infratentorial compartments. It also plays a significant role in neurosurgical procedures and diagnosis of intracranial pathologies. Synonyms for the MonroRichter line include Monro's line, Richter line, MonroKellie doctrine, and MonroKellie hypothesis. Understanding the importance of this anatomical landmark allows medical professionals to accurately analyze and manage various cerebral conditions.