Final answer:
The top center compartment of the nine abdominopelvic regions is called the epigastric region, which aids in localizing symptoms or conditions.
Step-by-step explanation:
The abdominopelvic cavity can be divided into nine regions for study and reference. Of these nine compartments, the one located at the top center is called the epigastric region. It's situated above the umbilical region and bordered by the left and right hypochondriac regions. This system of dividing the abdominopelvic cavity aids in the description and localization of symptoms or medical conditions affecting internal organs within the cavity.