• Source: 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.




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 backward.




Etymology


The lambdoid suture is named due to its uppercase lambda-like shape.




Additional images































References



"Sagittal suture." Stedman's Medical Dictionary, 27th ed. (2000).
Moore, Keith L., and T.V.N. Persaud. The Developing Human: Clinically Oriented Embryology, 7th ed. (2003).




External links



Anatomy figure: 22:01-03 at Human Anatomy Online, SUNY Downstate Medical Center (Posterior)
Anatomy figure: 22:03-02 at Human Anatomy Online, SUNY Downstate Medical Center (Lateral)
"Anatomy diagram: 34256.000-2". Roche Lexicon - illustrated navigator. Elsevier. Archived from the original on 2014-01-01.

Kata Kunci Pencarian:

• Lambdoid suture
• Fibrous joint
• Sagittal suture
• Craniosynostosis
• Vertex (anatomy)
• Occipital bone
• Apert syndrome
• Parietal bone
• Lambda (anatomy)
• List of anatomy mnemonics