What is a parietal stitch?

also in anatomy referred to as a sagittal stitch, a parietal stitch is a joint connecting the parietal bones of the skull. These two bones form the upper and rear of the skull, part of the skull that surrounds and protects the brain. Unlike the joints found in the knees or elbows, the parietal stitch is a fibrous joint, which means that it does not contain cartilage or synovial fluid bag, but rather a network of connective fibers that hold the bones together. Parietal stitch, which is also categorized as syrartosis, is not designed for movement, but rather allows only the slightest amount of contraction and expansion between bones. These bones in the shape of curved boards that form the forehead, temples and back and the skull base. Parietal bones are paired and form both sides of the upper and rear parts; The parietal stitch is a vertical joint between them. Unlike most joint joints, which include articulating ends of two long bones, the parietal stitch is a long and continuous joint, including shared media boundaries of parietal bones.

From the center of the upper part of the skull, where the parietal bones encounter the frontal bone - the bones of the forehead - the parietal stitch forms the middle line that passes through the rear of the skull. However, it is not a line, but an uneven joint reminiscent of a crack in the sidewalk. When the skull is still formed in the uterus, the individual bones are slightly separated, allowing the child's head to be compressed during delivery. After birth, these bones begin to harden and unite, their uneven edges gradually join.

In the space between parietal bones along the entire length of the thigh, the thick collection of collagen fibers is a thick collection of collagen fibers. The type of connective tissue, similar to bindings and tendons, these fibers are named Sharpey fibers and serve contradictory functions in the joint. On the one hand, they are strong enough to hold the bones together, surround the brain into the protective bone. However, they are also sufficiently elastic to allow the skull to expandand to conclude a contract as it may be necessary to alleviate the brain swelling after a shock or other injury.