Nasion lies at the junction of
Frontonasal and internasal suture
Frontonasal and interparietal suture
Frontonasal and frontozygomatic suture
Frontogomatic and internasal suture
The nasion is the point where the internasal and frontonasal sutures meet. It lies a little above the floor of the depression at the root of the nose, below the glabella. Nasion is termed as the central point of the frontonasal suture. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.
Head and neck