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The coronal suture is a dense, ... Superior view of anterior part of the skull. Coronal suture runs horizontally. Coronal suture seen from inside.
The sagittal suture 'divides' the coronal suture in two halves; unilateral meaning that either the right side or the left side to the sagittal suture is fused. This fact immediately raises an important point. Unlike closure of the sagittal or the metopic suture, right and left are not the same in unilateral coronal synostosis.
The frontal angle is practically a right angle, and corresponds with the point of meeting of the sagittal and coronal sutures; this point is named the bregma; in the fetal skull and for about a year and a half after birth this region is membranous, and is called the anterior fontanelle.
It forms the main component of the skull roof. The calvaria is made up of the superior portions of the frontal bone, occipital bone, and parietal bones. [1] In the human skull, the sutures between the bones normally remain flexible during the first few years of postnatal development, and fontanelles are palpable.
Craniosynostosis, a condition in which the sutures of the head (joints between the bones of the skull) prematurely fuse and subsequently alter the shape of the head, is seen in multiple conditions, as listed below. The level of involvement varies by condition and can range from minor, single-suture craniosynostosis to major, multisutural ...
Side view of the skull Human skull side sutures right. A suture is a type of fibrous joint that is only found in the skull (cranial suture). The bones are bound together by Sharpey's fibres. A tiny amount of movement is permitted at sutures, which contributes to the compliance and elasticity of the skull. These joints are synarthroses. [1]
Fig. 1 Cranial sutures viewed from top of head Fig. 2 Skull deformities associated with single suture synostosis. The bones of the human skull are joined by cranial sutures (see figure 1). The anterior fontanelle is where the metopic, sagittal and coronal sutures meet. Normally the sutures gradually fuse within the first few years after birth.
The bregma is located at the intersection of the coronal suture and the sagittal suture on the superior middle portion of the calvaria. [1] It is the point where the frontal bone and the two parietal bones meet.