Pterion - a region found in the side of the skull where frontal , parirtal, temporal and sphenoid bones connect together... clinical significance ✌ the anterior divison of middle meningeal artery lies underneath it ..so traumatic blow in the pterion causes rupture of middle meningeal artery ...causing EPI DURAL HAEMATOMA* 🤷♂️🤷♂️🙏EDH - accumulation of blood between skull and duramater