Cranial sutures

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Side view of the skull.

For the surgical technique, see suture.

Cranial sutures are the immobile joints between the bones of the skull (or "cranium").

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.

Contents

1 List of sutures

1.1 Primarily visible from the side (norma lateralis)
1.2 Primarily visible from front (norma frontalis) or above (norma verticalis)
1.3 Primarily visible from below (norma basalis) or inside

2 External links

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 parietals and the occipital bone
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

Cranial bones - [http://encycl.opentopia.com/ edit]
occipital bone: Foramen magnum \| Squama occipitalis (Inion \| Nuchal lines \| Planum occipitale \| Planum nuchale \| Internal occipital protuberance \| Sagittal sulcus \| Internal occipital crest) \| Lateral parts (Hypoglossal canal \| Condyloid fossa \| Condyloid canal \| Jugular process \| Jugular tubercle) \| Basilar part (Pharyngeal tubercle) parietal bone: Parietal eminence \| Temporal line \| Parietal foramen frontal bone: Squama frontalis (Frontal suture \| Frontal eminence \| Superciliary arches \| Glabella \| Supraorbital foramen \| Zygomatic process \| Sagittal sulcus \| Frontal crest \| Foramen cecum) \| Pars orbitalis (Frontal sinus \| Frontonasal duct) temporal bone: Squama temporalis (Articular tubercle \| Suprameatal triangle \| Mandibular fossa \| Petrotympanic fissure) \| Mastoid portion (Mastoid foramen \| Mastoid process \| Mastoid notch \| Occipital groove \| Sigmoid sulcus \| Mastoid antrum) \| Petrous portion (Hiatus of the facial canal \| Internal auditory meatus \| Subarcuate fossa \| Carotid canal \| Aqueduct of cochlea \| Jugular fossa \| Inferior tympanic canaliculus \| Mastoid canaliculus \| Styloid process \| Stylomastoid foramen \| Jugular foramen \| Petrosquamous suture) \| Tympanic part (Suprameatal spine) \| Zygomatic process sphenoid bone: Sphenoidal sinuses \| Ethmoidal spine \| Optic foramen \| Sella turcica \| Fossa hypophyseos \| Dorsum sellae \| Posterior clinoid processes \| Carotid groove \| Lingula sphenoidalis \| Sphenoidal conchæ \| Great wings (Spina angularis \| Foramen rotundum \| Foramen ovale \| Foramen Vesalii \| Foramen spinosum \| Infratemporal crest \| Sulcus tubae auditivae \| Small wings \| Superior orbital fissure \| Anterior clinoid process \| Optic foramen) \| Pterygoid processes (Pterygoid fossa \| Scaphoid fossa \| Lateral pterygoid plate \| Medial pterygoid plate \| Pterygoid hamulus \| Sphenoidal conchæ \| Sphenoidal sinuses) ethmoid bone: Cribriform plate \| Crista galli \| Perpendicular plate \| Labyrinth \| Ethmoid sinus \| Uncinate process \| Middle nasal concha \| Superior meatus \| Superior nasal concha \| Middle meatus
Facial bones
maxilla: Incisive fossa \| Maxillary sinus \| Incisive fossa \| Canine fossa \| Infraorbital foramen \| Anterior nasal spine \| Alveolar canals \| Orbitofrontal cortex \| Infraorbital canal \| Pterygopalatine canal \| Zygomatic process \| Agger nasi \| Anterior lacrimal crest \| Alveolar process \| Incisive foramen \| Incisive canals \| Foramina of Scarpa \| Premaxilla \| Anterior nasal spine lacrimal bone: Posterior lacrimal crest zygomatic bone: Zygomaticofacial foramen \| Zygomaticotemporal foramen \| Zygomaticoörbital foramina palatine bone: Pterygopalatine fossa \| Pterygoid fossa \| Horizontal plate \| Posterior nasal spine \| Perpendicular plate \| Pterygopalatine canal \| Sphenopalatine foramen \| Pyramidal process \| Orbital process \| Sphenoidal process mandible: Symphysis menti \| Mental foramen \| Mylohyoid line \| Ramus mandibulae \| Mandibular foramen \| Mandibular canal others: nasal bone \| inferior nasal conchae \| vomer bone
composite structures
Cranial sutures: Coronal \| Lambdoidal \| Occipitomastoid \| Parietomastoid \| Sphenofrontal \| Sphenoparietal \|Sphenosquamosal \| Sphenozygomatic \|Squamosal \| Zygomaticotemporal \| Zygomaticofrontal \| Frontal/Metopic \| Sagittal \| Frontoethmoidal \| Petrosquamous \| Sphenoethmoidal \| Sphenopetrosal Asterion \| Nasion \| Pterion \| Dacryon \| Inferior orbital fissure

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