The coronal suture is a dense, fibrous
connective tissue joint that separates the two
parietal bones from the
frontal bone
The frontal bone is a bone in the human skull. The bone consists of two portions.''Gray's Anatomy'' (1918) These are the vertically oriented squamous part, and the horizontally oriented orbital part, making up the bony part of the forehead, par ...
of the
skull.
Structure
The coronal suture lies between the paired
parietal bones and the
frontal bone
The frontal bone is a bone in the human skull. The bone consists of two portions.''Gray's Anatomy'' (1918) These are the vertically oriented squamous part, and the horizontally oriented orbital part, making up the bony part of the forehead, par ...
of the
skull.
It runs from the
pterion on each side.
Nerve supply
The coronal suture is likely supplied by a branch of the
trigeminal nerve.
Development
The coronal suture is derived from the
paraxial mesoderm
Paraxial mesoderm, also known as presomitic or somitic mesoderm is the area of mesoderm in the neurulating embryo that flanks and forms simultaneously with the neural tube. The cells of this region give rise to somites, blocks of tissue runn ...
.
Clinical significance
If certain bones of the skull grow too fast then premature fusion of the sutures may occur.
This can result in skull deformities.
There are two possible deformities that can be caused by the premature closure of the coronal suture:
* a high, tower-like skull called "
oxycephaly" or "turret skull".
* a twisted and asymmetrical skull called "
plagiocephaly".
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).
Additional images
File:Coronal suture - animation04.gif, Animation. Coronal suture shown in red.
File:Coronal suture - animation08.gif, Frontal bone
The frontal bone is a bone in the human skull. The bone consists of two portions.''Gray's Anatomy'' (1918) These are the vertically oriented squamous part, and the horizontally oriented orbital part, making up the bony part of the forehead, par ...
and parietal bones.
File:Gray188-Coronal suture.png , Side view of the skull. ('Coronal suture' indicated by the arrow.)
File:Coronal suture 2.jpg, Superior view of anterior part of the skull. Coronal suture runs horizontally.
File:Sobo 1909 47 - Coronal suture.png, Coronal suture seen from inside.
File:Gray198.png, The skull at birth, showing the lateral fontanelle.
File:Coronal suture.jpg, Coronal suture of new born baby.
External links
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Cranial sutures
Human head and neck
Joints
Joints of the head and neck
Skeletal system
Skull