1. The midpoint of the anterior margin of the foramen magnum in the skull, used as a reference point in anatomical and anthropological measurements.
Usage: anatomy; anthropology; technical

Examples

• The basion serves as a crucial landmark in craniometric analysis.
• Anthropologists measure the distance from the basion to other skull points to classify human remains.
• In anatomical studies, the basion is identified at the anterior edge of the foramen magnum.
• The basion-nasion line is commonly used in cephalometric radiography.
• Researchers located the basion precisely using three-dimensional imaging techniques.