fontanelles

Fontanels

At birth, membrane filled space found between cranial bones is called fontanels or soft spot fontanels are;

1. Frontal (anterior fontanels)

Between angle of 2 parietal bones and frontal bone (diamond shape).

Largest of 6 fontanels.

Closes 18-24 month after child is born.

2. Posterior occipital fontanels

Between occipital bones and two parietal bones. 

Diamond shape

Close 2 months after birth

3. Anterolateral  sphenoid fontanels

Situated at junction of frontal, parietal, temporal and sphenoid bone (each side of skull).

Irregular shape

Closes 3 months after birth

4. Posterolateral (mastoid) fontanels

Present at junction of parietal, occipital and temporal bone.

Irregular shape

Close 1, 2 months after birth.