A pial funnel refers to a narrow and elongated structure within the brain that acts as a passageway for cerebral arteries. Synonyms for this term include "pia matter funnel" or "cortical funnel". These synonyms are often used in the medical field to describe the same anatomical structure. The pial funnel is crucial for blood circulation within the brain, ensuring that oxygen and nutrients are delivered to the cerebral tissues. Its distinct shape and function make it an essential component of the circulatory system in the brain. Understanding these synonyms can facilitate clearer communication and exchange of knowledge within the medical community.