Anatomy of the Newborn Skull
|Click Image to Enlarge|
Although the skull appears to be 1 large bone, there are actually several major bones that are connected together. The major bones that compose the skull of a newborn include the following:
2 frontal bones
2 parietal bones
1 occipital bone
These bony plates cover the brain and are held together by fibrous material called sutures.
What are sutures?
Sutures allow the bones to move during the birth process. They act like an expansion joint. This allows the bone to enlarge evenly as the brain grows and the skull expands. The result is a symmetrically shaped head. Some sutures extend to the forehead, while others extend to the sides and back of the skull. One suture in the middle of the skull extends from the front of the head to the back. The major sutures of the skull include the following:
Metopic suture. This extends from the top of the head down the middle of the forehead, toward the nose. The 2 frontal bone plates meet at the metopic suture.
Coronal suture. This extends from ear to ear. Each frontal bone plate meets with a parietal bone plate at the coronal suture.
Sagittal suture. This extends from the front of the head to the back, down the middle of the top of the head. The 2 parietal bone plates meet at the sagittal suture.
Lambdoid suture. This extends across the back of the head. Each parietal bone plate meets the occipital bone plate at the lambdoid suture.
If any of the sutures close too early (fuse prematurely), there may be no growth in that area. This may force growth to happen in another area or direction. This results in an abnormal head shape (craniosynostosis).
What are fontanelles?
There are 2 fontanelles (the space between the bones of an infant’s skull where the sutures intersect) that are covered by tough membranes that protect the underlying soft tissues and brain. The fontanelles include:
Anterior fontanelle (also called soft spot). This is the junction where the 2 frontal and 2 parietal bones meet. The anterior fontanelle remains soft until about 18 months to 2 years of age. Doctors can assess if there is increased intracranial pressure by feeling the anterior fontanelle.
Posterior fontanelle. This is the junction of the 2 parietal bones and the occipital bone. The posterior fontanelle usually closes first, before the anterior fontanelle, during the first several months of an infant’s life.
1351Baby shower guest sign in ideas
2533Boy baby shower decorations ideas
1607Girl baby shower favors ideas
1791TOP 10 Girl baby shower themes ideas for 2017
600Baby shower fruit tray ideas
3923Baby shower snack ideas pinterest
4319Baby shower afternoon tea ideas
1909Purchase The Special Twin Baby Shower Cakes From Your Local Stores
4291High tea baby shower ideas – 10 ways to have a High tea baby shower party!
2553TOP 10 Baby girl baby shower food ideas
218710 Useful Triplet baby shower ideas for you!
2463Baby shower ideas pinterest boy
554Welcoming a Baby Angel in Style with the Best Baby shower souvenir ideas
2041Planning a Baby shower program ideas – detailed guide
4315Baby shower centerpieces ideas pictures – 10 methods to brighten your baby shower party
23689It is Safe to Eat Raw Meat – A Guide to Choosing the Right Type
3165Baby shower charades ideas
4327Baby shower onesie ideas – 10 secrets to know
2587Silhouette cameo baby shower ideas
23782Birth Control, NuvaRing, and Deception
1455Woodland animals baby shower ideas
23706Calorie Restriction – The Quality of Diet Seems to Matter
4199High tea ideas for baby shower
1014Cute baby boy shower ideas
1787Party favor ideas baby shower
506Baby shower gift ideas for mom
546Diy baby shower gift basket ideas
3311Gift ideas for mom to be at baby shower
1467Baby shower ideas for twin boys
23725Break Time for Nursing Mothers in the Workplace
678Baby shower table centerpiece ideas
796Baby shower prizes ideas for games
3129Baby shower speech ideas
2787Ideas for baby shower gift baskets
1178Baby shower ideas 2014
2091Baby girl baby shower cake ideas