sagittal suture

anatomy

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July 13, 2026

Quick Summary

The sagittal suture is a fibrous joint that runs along the top midline of the skull, connecting the two parietal bones. This suture is crucial for skull development, allowing the brain to grow. Normally, it fuses between the ages of 22 and 31.1

Premature fusion of the sagittal suture, known as craniosynostosis, can lead to a long, high, and narrow skull shape called scaphocephaly. This condition is more common in males and can sometimes be familial. Surgical intervention within the first two years of life can help minimize deformities and prevent complications like mental retardation and blindness by allowing the sutures to remain open until brain growth is complete.2

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human skeleton
Interior of the cranium
…front to back, along the sagittal suture, the seam between the two parietal bones, is a shallow depression—the groove for the superior longitudinal venous sinus, a large channel for venous blood. A number of depressions on either side of it mark the sites of the pacchionian bodies, structures that permit…
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…front to back, along the sagittal suture, the seam between the two parietal bones, is a shallow depression—the groove for the superior longitudinal venous sinus, a large channel for venous blood. A number of depressions on either side of it mark the sites of the pacchionian bodies, structures that permit…
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joint
Fibrous joints
…and the newborn child, the sagittal suture, which separates the right and left halves of the roof of the skull, is quite wide and markedly so at its anterior and posterior ends. This enables one of the halves to glide over the other during the passage of the child through…
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…and the newborn child, the sagittal suture, which separates the right and left halves of the roof of the skull, is quite wide and markedly so at its anterior and posterior ends. This enables one of the halves to glide over the other during the passage of the child through…
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parietal bone
…top of the head (sagittal suture) and form a roof for the cranium. The parietal bone forms in membrane (i.e., without a cartilaginous precursor); the sagittal suture closes between ages 22 and 31. In primates that have large jaws and well-developed chewing muscles (e.g., gorillas and baboons), the parietal…
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…top of the head (sagittal suture) and form a roof for the cranium. The parietal bone forms in membrane (i.e., without a cartilaginous precursor); the sagittal suture closes between ages 22 and 31. In primates that have large jaws and well-developed chewing muscles (e.g., gorillas and baboons), the parietal…
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