lambdoid suture lambdoid suture the lambdoid suture (or lambdoidal suture) is a dense, fibrous connective tissue joint on the posterior aspect of the skull that connects the parietal bones with the occipital bone. it is continuous with the occipitomastoid suture. lambdoid suturelambdoid suture (shown in red line)lambdoid suture (labeled at bottom right)detailspart ofskullnervesupraorbital nerveidentifierslatinsutura lambdoideata98a03.1.02.004ta21577fma52933anatomical terms of bone structure the lambdoid suture is between the paired parietal bones and the occipital bone of the skull. it runs from the asterion on each side. nerve supply the lambdoid suture may be supplied by a branch of the supraorbital nerve, a branch of the frontal branch of the trigeminal nerve. clinical significance at birth, the bones of the skull do not meet. if certain bones of the skull grow too fast, then craniosynostosis (premature closure of the sutures) may occur. this can result in skull deformities. if the lambdoid suture closes too soon on one side, the skull will appear twisted and asymmetrical, a condition called "plagiocephaly". plagiocephaly refers to the shape and not the condition. the condition is craniosynostosis. the lambdoid suture can be damaged by a fall backwards. etymology the lambdoid suture is named due to its uppercase lambda-like shape. additional images animation. lambdoid suture shown in red. parietal bones (above) and occipital bone (below). skull seen from behind. showing λ-like shape of the lambdoid suture. lambdoid suture seen from above. lambdoid suture seen from inside. lambdoid suture, medial view. indicated by yellow line. lambdoid suture with wormian bones, seen from behind.