Which suture runs along the midline of the skull, separating the two Parietal bones?

• A. Coronal suture
• B. Sagittal suture
• C. Squamous suture
• D. Lambdoid suture

Answer: (B)

Skull sutures are fibrous joints that hold the bones of the skull together while allowing growth. The suture that runs along the midline and separates the two parietal bones is the sagittal suture. It begins near the front where the coronal suture lies and runs straight back along the top of the skull to meet the lambdoid suture at the back, effectively dividing the parietal bones along the midline. The coronal suture crosses the skull from side to side between the frontal bone and the parietal bones, the squamous suture sits along the side between the parietal and temporal bones, and the lambdoid suture forms the line between the parietal bones and the occipital bone at the rear. These sutures permit growth in infancy and early childhood and later fuse as the skull matures.