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Encyclopedia > Cranial sutures
Side view of the skull.
Side view of the skull.

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. Image File history File links Gray188. ... Image File history File links Gray188. ... This article is about a joint in zootomical anatomy. ... Sharpeys fibres (bone fibres, or perforating fibres) are a matrix of connective tissue consisting of bundles of strong collagenous fibres connecting periosteum to bone. ... Compliance is a measure of the tendency of a hollow organ to resist recoil toward its original dimensions upon removal of a distending or compressing force. ... Elasticity has meanings in two different fields: In physics and mechanical engineering, the theory of elasticity describes how a solid object moves and deforms in response to external stress. ...


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] This is about the human anatomical feature. ... The word forensic (from Latin: forensis - forum) refers to something of, pertaining to, or used in a court of law. ... Archaeology, archeology, or archæology (from Greek: αρχαίος, archaios, combining form in Latin archae-, ancient; and λόγος, logos, knowledge) is the study of human cultures through the recovery, documentation and analysis of material remains and environmental data, including architecture, artifacts, biofacts, human remains, and landscapes. ...

Contents

List of sutures

Most sutures are named for the bones they articulate, but some have special names of their own.


Primarily visible from the side (norma lateralis)

The coronal suture (sutura coronalis) is a dense, fibrous connective tissue joint that separates the frontal and parietal bones of the skull. ... A front, in addition to its common dictionary meanings, may specifically refer to: a weather front, a boundary of two airmasses a military front, an area where armies are engaged in conflict a Front (Soviet Army), a major military subdivision of the Soviet Army a front organization or front company... The parietal bones (os parietale) are bones in the human skull and form, by their union, the sides and roof of the cranium. ... The lambdoid suture (sutura lambdoidea) is a dense, fibrous connective tissue joint that separates the parietal and temporal bones of the skull from the occipital bone. ... The occipital bone, a saucer-shaped membrane bone situated at the back and lower part of the cranium, is trapezoid in shape and curved on itself. ... The occipitomastoid suture is the cranial suture between the occipital bone and the mastoid portion of the temporal bone. ... The squamosal suture arches backward from the pterion and connects the temporal squama with the lower border of the parietal: this suture is continuous behind with the short, nearly horizontal parietomastoid suture, which unites the mastoid process of the temporal with the region of the mastoid angle of the parietal. ... The Sphenofrontal suture is the cranial suture between the sphenoid bone and the frontal bone. ... The Sphenoparietal suture is the cranial suture between the sphenoid bone and the parietal bone. ... The Sphenosquamosal suture is a cranial suture between the sphenoid bone and the squama of the temporal bone. ... The Sphenozygomatic suture is the cranial suture between the sphenoid bone and the zygomatic bone. ... The squamosal suture arches backward from the pterion and connects the temporal squama with the lower border of the parietal: this suture is continuous behind with the short, nearly horizontal parietomastoid suture, which unites the mastoid process of the temporal with the region of the mastoid angle of the parietal. ... The temporal bones (os temporales) are situated at the sides and base of the skull. ... The Zygomaticotemporal suture (or Temporozygomatic suture) is the cranial suture between the zygomatic bone and the temporal bone. ... The Zygomaticofrontal suture (or Frontozygomatic suture) is the cranial suture between the zygomatic bone and the frontal bone. ...

Primarily visible from front (norma frontalis) or above (norma verticalis)

The frontal suture (sutura frontalis) is a dense connective tissue structure that divides the two halves of the frontal bone of the skull in infants and children. ... The frontal suture is a dense connective tissue structure that divides the two halves of the frontal bone of the skull in infants and children. ... The frontal bone is a bone in the human skull that resembles a cockle-shell in form, and consists of two portions: a vertical portion, the squama frontalis, corresponding with the region of the forehead. ... The sagittal suture (sutura sagittalis) is a dense, fibrous connective tissue joint between the two parietal bones of the skull. ... The parietal bones (os parietale) are bones in the human skull and form, by their union, the sides and roof of the cranium. ...

Primarily visible from below (norma basalis) or inside

The frontoethmoidal suture is the suture between the ethmoid bone and the frontal bone. ... The Petrosquamous suture is a cranial suture between the petrous portion and the squama of the temporal bone. ... The Sphenoethmoidal suture is the cranial suture between the sphenoid bone and the ethmoid bone. ... The Sphenopetrosal suture is the cranial suture between the sphenoid bone and the petrous portion of the temporal bone. ...

External links


  Results from FactBites:
 
Aging and Sexing Using Cranial Sutures (1773 words)
Use of suture closure as an age estimate is predicated upon the hypothesis that suture closure is part of the aging process.
Cranial sutures were viewed as controlling both the growth of the brain and, therefore, the shape of the skull.
During the 19th century, it was observed that cranial union first occurs in the sagittal suture, and that it occurred earlier within the cranium than upon the exterior (Todd and Lyon 1924:328).
Craniodontics, Dental Orthopedics, Orthodontics (2089 words)
Researchers describe sutures as having the potential for micro-motion as a means of responding to biomechanical forces and stresses, which occur in vivo.
Retzlaff and other researchers in their "gross and microscopic examination of the parieto-parietal and parieto-temporal cranial sutures obtained by autopsy from seventeen human cadavers with the age range of seven to seventy-eight years shows that these sutures remain as clearly identifiable structures even in the oldest samples.
Hubbard and other researchers found "that cranial sutures are slightly more compliant to flexure about an axis along the sutures than the ‘equivalent' layered cranial bone structures." Their clinical observation revealed greater movement in the sutures of both embalmed and unembalmed skulls.
  More results at FactBites »

 
 

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