What is bregma bone?

The bregma is the midline bony landmark where the coronal and sagittal sutures meet, between the frontal and two parietal bones. It is the anterior fontanelle in the neonate and closes in the second year 2 (typically around 18 months after birth).

What are coronal and sagittal sutures?

Coronal suture – unites the frontal bone with the parietal bones. Sagittal suture – unites the 2 parietal bones in the midline. Lambdoid suture – unites the parietal bones with the occipital bone. Squamosal suture – unites the squamous portion of the temporal bone with the parietal bones.

What is bregma level?

The bregma is located at the intersection of the coronal suture and the sagittal suture on the superior middle portion of the calvaria. It is the point where the frontal bone and the two parietal bones meet.

What does the bregma do?

n. the location on the top of the skull that marks the junction of the sutures (immovable joints) between the frontal bone and the two parietal bones (forming the sides of the skull). It is used as a landmark for stereotactic and other procedures (see stereotaxy).

Can you feel the bregma?

Palpate the vertex of the skull with your thumb or fingerpads. Starting from the bregma, lying in a slight depression, palpate bilaterally (both ways at the same time) sideways along the coronal suture. You are feeling the junction between the parietal and the frontal bones.

What is bregma and lambda?

Bregma is the intersection of the two sutures, the coronal suture and the sagittal suture. The word bregma is of Greek origin, meaning “top of the head.” The more posterior marker is called lambda. Lambda is the spot where the three cranial plates, the two parietal bones and the occipital bone (back of the head) meets.

What is coronal suture?

The coronal suture is a dense and fibrous association of connection tissue located in between the frontal and parietal bones of the skull. At birth, the sutures decrease in size (molding) and allow the skull to become smaller.

Is it normal to feel suture lines?

It is normal for infants to have these soft spots, which can be seen and felt on the top and back of the head. Fontanelles that are abnormally large may indicate a medical condition. The sutures or anatomical lines where the bony plates of the skull join together can be easily felt in the newborn infant.