What is Sutures Of Skull?

Information about Sutures Of Skull

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:

*Surgery, to describe stitches and other techniques for holding tissues together.

* Geology, to describe a certain type of boundary between layers of rock.

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.

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)

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

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

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

Primarily visible from below (norma basalis) or inside

External links

Age at Death Estimation from Cranial Suture Closures

• • [ e] Bones of head and neck: cranial sutures, fontanelles, and related regions
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

In anatomy, a suture is a fairly rigid joint between two or more hard elements of an animal, without significant overlap. Sutures are found in a wide range of animals, from the Cambrian period to the present day.
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Sutures are the stitches that doctors, and especially surgeons, use to hold skin, internal organs, blood vessels and all other tissues of the human body together, after they have been severed by injury or surgery.
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A suture is in structural geology a major fault zone through an orogen or mountain range. Sutures separate terranes: tectonic units that have different plate tectonic, metamorphic and paleogeographic histories.
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Sharpey's fibres (bone fibres, or perforating fibres) are a matrix of connective tissue consisting of bundles of strong collagenous fibres connecting periosteum to bone.
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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. It is the reciprocal of "elastance".
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Elasticity is a branch of physics which studies the properties of elastic materials. A material is said to be elastic if it deforms under stress (e.g., external forces), but then returns to its original shape when the stress is removed.
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fontanelle (or fontanel) is one of two "soft spots" on a newborn human's skull. There are, however, two more fontanelles of interest, the mastoid fontanelle, and the sphenoidal fontanelle.
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Forensic science (often shortened to forensics) is the application of a broad spectrum of sciences to answer questions of interest to the legal system. This may be in relation to a crime or to a civil action.
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The coronal suture is a dense, fibrous connective tissue joint that separates the frontal and parietal bones of the skull. At birth, the bones of the skull do not meet.

Pathology

If certain bones of the skull grow too fast then "premature closure" of the sutures may occur.
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Front may refer to:

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The Front (The Simpsons episode)
Front (identity) for a blacklisted artist
Front (magazine)
Front (military), an area where armies are engaged in conflict

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The parietal bones are bones in the human skull and form, by their union, the sides and roof of the cranium. Each bone is irregularly quadrilateral in form, and has two surfaces, four borders, and four angles.

Surfaces

External

The external surface [Fig.
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The lambdoid suture (or Lambdoidal suture) is a dense, fibrous connective tissue joint that separates the parietal and temporal bones of the skull from the occipital bone.

Its name comes from the lambda-like shape this suture makes on the back of the skull.
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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. It is pierced by a large oval aperture, the foramen magnum, through which the cranial cavity communicates with the vertebral canal.
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The occipitomastoid suture is the cranial suture between the occipital bone and the mastoid portion of the temporal bone.

It is continuous with the lambdoidal suture.
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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
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The Sphenofrontal suture is the cranial suture between the sphenoid bone and the frontal bone.

Additional images

The skull from the front.

Base of the skull. Upper surface.

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The Sphenoparietal suture is the cranial suture between the sphenoid bone and the parietal bone.

External links

SIG at UWash Sphenoparietal%20suture

This article was originally based on an entry from a public domain edition of Gray's Anatomy.
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The Sphenosquamosal suture is a cranial suture between the sphenoid bone and the squama of the temporal bone.

Additional images

Base of the skull. Upper surface.

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The Sphenozygomatic suture is the cranial suture between the sphenoid bone and the zygomatic bone.

Additional images

The skull from the front.

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The temporal bones are situated at the sides and base of the skull.

The temporal bone supports that part of the face known as the temple.

Parts

Each consists of five parts:

Squama temporalis
Mastoid portion
Petrous portion
Tympanic part

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The Zygomaticotemporal suture (or Temporozygomatic suture) is the cranial suture between the zygomatic bone and the temporal bone.

External links

SIG at UWash Temporozygomatic%20suture
Roche Lexicon - illustrated navigator, at Elsevier

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The Zygomaticofrontal suture (or Frontozygomatic suture) is the cranial suture between the zygomatic bone and the frontal bone.

Additional images

Left zygomatic bone in situ.

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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. It usually disappears by the age of six, with the two halves of the frontal bone being fused together.
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The frontal bone is a bone in the human skull that resembles a cockleshell in form, and consists of two portions:

a vertical portion, the squama frontalis, corresponding with the region of the forehead.

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The sagittal suture is a dense, fibrous connective tissue joint between the two parietal bones of the skull. At birth, the bones of the skull do not meet. If certain bones of the skull grow too fast then "premature closure" of the sutures may occur.
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Surfaces

External

The external surface [Fig.
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