Sutura sagittalis

Sutura Sagittalis is a fibrous joint that separates the two parietal bones of the skull. It is named for its resemblance to an arrow, as "sagitta" in Latin means "arrow". This suture is part of the larger system of sutures in the skull that allows for growth and development of the brain and skull during infancy and childhood.

Anatomy

The sutura sagittalis runs along the midline of the top of the skull, from the fontanelle at the front to the lambda at the back. It is bordered by the two parietal bones. The sutura sagittalis is a type of synarthrosis, which is a joint that allows for little or no movement.

Development

During infancy, the sutura sagittalis is not fully fused, allowing for the rapid growth of the brain and skull. This is a critical period of development, as the brain triples in size during the first year of life. The sutura sagittalis and other sutures in the skull gradually fuse as the individual matures, typically by the end of adolescence.

Clinical Significance

Premature fusion of the sutura sagittalis, a condition known as sagittal synostosis or scaphocephaly, can lead to an abnormally long and narrow skull. This can cause increased intracranial pressure, developmental delays, and cosmetic issues. Treatment typically involves surgery to separate the fused bones and allow for normal growth and development.

See Also

• Cranial sutures
• Scaphocephaly
• Craniosynostosis