Synonyms for the phrase "iter a tertio ad quartum ventriculum" are commonly found in the realm of anatomy and neurology. This Latin phrase translates to "pathway from the third to the fourth ventricle", referring to a specific neural pathway within the brain. Synonymous terms include "cerebral aqueduct", "Sylvian aqueduct" or "aqueduct of Sylvius". These terms all describe the same anatomical structure responsible for cerebrospinal fluid circulation, connecting the third and fourth ventricles in the brain. Understanding these synonyms is crucial in medical research, diagnosis, and treatment of conditions involving this important cerebral pathway.