The lambdoid suture is a fibrous joint located at the back of the skull. It connects the two parietal bones to the occipital bone, forming a shape similar to the Greek letter lambda (Λ). This suture plays a crucial role in the growth and development of the skull during infancy and childhood. As a part of the human skull, the lambdoid suture helps protect the brain and supports the structure of the head. Over time, this suture may fuse, which is a normal part of aging. Abnormal fusion can lead to conditions such as craniosynostosis, affecting head shape and brain development.