Posterior Fontanelle Closure

In humans the sequence of fontanelle closure is as follows.

Posterior fontanelle closure. The posterior fontanelle lambdoid fontanelle occipital fontanelle is a gap between bones in the human skull known as fontanelle triangular in form and situated at the junction of the sagittal suture and lambdoidal suture it generally closes in 6 8 weeks from birth. It persists until approximately 2 3 months after birth after which it is known as the l ambda. My almost 7 months old son s posterior soft spot is not closed he keeps getting dents whenever he sits in the car seat or high chair for too long and the dent becomes less visible the next day but still can be touched.

The fontanelles should feel firm and very slightly curved inward to the touch. The sphenoidal and posterior fontanelles close during the first few months of life. At birth the average size of the anterior fontanelle is about an inch in diameter 2 1 centimeters but it can be bigger or smaller.

This small opening. The posterior fontanelle or occipital fontanelle is the triangular soft membranous gap at the junction of the lambdoid and sagittal sutures. It is the fontanelle that most people know as the soft spot it is the largest of the fontanelles.

It can be used as an additional sonographic window for performing cranial ultrasound to improve visualization of dependently layering intraventricular hemorrhage. It is the first to close. In humans the sequence of fontanelle closure is as follows.

The closures eventually form the sutures of the neurocranium. The fontanelle in the back of the head posterior fontanelle most often closes by the time an infant is 1 to 2 months old. There are two sphenoid fontanelles on either side of the.

The anterior and posterior two mastoid and two sphenoid 4 the rhomboid shaped anterior fontanel located at the juncture of the two parietal and two frontal bones. The cranial point in adults corresponding the fontanelle is called lambda a delay in closure is associated with. The fontanelle at the top of the head anterior fontanelle most often closes between 7 to 19 months.