Norma Verticalis

Anatomy - Norma Verticalis

1. Norma Verticalis V.S.Rashmi Priyem ULTRA’S BEST Dental Science College

2. Norma Verticalis When the Skull is Viewed from Above, it Appears Oval, being Wider Posteriorly than Anteriorly

3. The Bones are Frontal, Parietal, and Occipital BONES

4. Bones 1. Frontal Bone ( Squamous Part) Anteriorly 2. Parietal Bones (Paired) on Each Side of Midline 3. Occipital Bone ( Squamous Part) Posteriorly

5. The Bones are United by the Sutures SUTURES

6. Coronal Suture Between Frontal and Two Parietal Bones Crosses the Cranial Vault from Side-to-Side

7. Sagittal Suture Between Two Parietal Bones Lies in the Median Plane

8. Lambdoid Suture Between occipital and two parietal bones It is Shaped Like the letter Lambda, Hence its Name

9. Metopic Suture Occasionally Present in about 3 to 8% Individuals Lies in the Median Plane and Separates the Two Halves of the Frontal Bone

10. Other Features

11. Bregma A Point at which Coronal and Sagittal Sutures Meet In the Foetal Skull, this is the Site of a Membranous Gap, called the Anterior Fontanelle , which Closes at Eighteen Months of Age

12. Parietal Eminence/Tuber An Area of Maximum Convexity of Parietal Bone

13. Vertex The Highest Point on the Skull It Lies on the Sagittal Suture near its middle and is Situated a few centimeters Behind the Bregma

14. Parietal Foramen A Small Foramen in Parietal Bone near Sagittal Suture, 2.5–4 cm in Front of Lambda

15. Obelion A Point on Sagittal Suture between the Two Parietal Foramina

16. Lambda The Meeting Point between the Sagittal and Lambdoid Sutures In the Foetal Skull, this is the Site of the Posterior Fontanelle which Closes at Two to Three Months of Age