Cranial Nerve X, also known as the vagus nerve, is a vital component of the human nervous system. This nerve controls various functions in the body, including swallowing, speech production, and regulating the heart rate. While the term "Cranial Nerve X" is commonly used in medical jargon, it has several synonyms that describe the same nerve. Some of these synonyms include the "wandering nerve" due to its extensive distribution throughout the body, and the "pneumogastric nerve" referencing its involvement in regulating digestive and respiratory functions. Understanding these synonyms can facilitate better communication amongst medical professionals and enhance knowledge of the vagus nerve's crucial role in maintaining overall bodily functions.