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Cranial sutures
From Wikipedia, the free encyclopedia
(Redirected from Sutura)
- This article is about joints in the bones of the cranium. There is also an article about sutures as features of a wide range of animals. "Suture" also has other meanings in other contexts:
Cranial sutures are the joints between the bones of the skull (or "cranium"), bound together by Sharpey's fibres. A tiny amount of movement is permitted at sutures, which contributes to the compliance and elasticity of the skull.
It is normal for many of the bones of the skull to remain unfused at birth. The term "fontanelle" is used to describe the resulting "soft spots". The relative positions of the bones continue to change during the life of the adult (though less rapidly), which can provide useful information in forensics and archaeology. In old age, cranial sutures may ossify (turn to bone) completely.[verification needed]
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Most sutures are named for the bones they articulate, but some have special names of their own.
- Coronal suture - between the frontal and parietal bones
- Lambdoid suture - between the parietal bones and the occipital boneis it the osteror sinus
- Occipitomastoid suture
- Parietomastoid suture
- Sphenofrontal suture
- Sphenoparietal suture
- Sphenosquamosal suture
- Sphenozygomatic suture
- Squamosal suture - between the parietal and the temporal bone
- Zygomaticotemporal suture
- Zygomaticofrontal suture
- Frontal suture / Metopic suture - between the two frontal bones, prior to the fusion of the two into a single bone
- Sagittal suture - along the midline, between parietal bones
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| Cranial sutures | Coronal - Lambdoid - Occipitomastoid - Sphenofrontal - Sphenoparietal - Sphenosquamosal - Sphenozygomatic -Squamosal - Zygomaticotemporal - Zygomaticofrontal - Frontal/Metopic - Sagittal - Frontoethmoidal - Petrosquamous - Sphenoethmoidal - Sphenopetrosal |
| Fontanelles | Anterior fontanelle - Posterior fontanelle |
| Foramina of multiple bones | Inferior orbital fissure - Foramen lacerum - Jugular foramen - Nasolacrimal canal |
| Fossae | Anterior cranial fossa - Middle cranial fossa - Posterior cranial fossa - Cranial cavity |
| Other compound structures | Asterion - Nasion - Pterion - Dacryon - Zygomatic arch - Calvaria - Temporal fossa - Infratemporal fossa - Stephanion - Pterygomaxillary fissure - Pterygopalatine fossa |
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