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Osteology of the Skull
Defines the bones, sutures, foramen, and processes of the skull and face.
101
Dentistry
Undergraduate 1
10/21/2012

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Term
Neurocranium
Definition
Part of the skull that surrounds the brain
Term
Name the bones of the neurocranium. Which bones are paired?
Definition
Frontal, Sphenoid, Ethmoid, Occipital, Temporal (paired), Parietal (paired)
Term
Viscerocranium
Definition
Facial part of the skull
Term
Name the bones of the viscerocranium. Which bones are paired?
Definition
Mandible, Vomer, Nasal (paired), Lacrimal (paired), Zygomatic (paired), Inferior Nasal Conchae (paired), Palatine (paired), Maxillae (paired)
Term
Suture
Definition
The joining of two or more bones.
Term
Foramen
Definition
Short, circular opening through a bone
Term
Canal
Definition
Long, tubular opening through a bone.
Term
Frontal Bone
Definition
Single cranial bone forming forehead and part of orbits.
Term
Zygomatic
Definition
Paired facial bones forming cheek bones.
Term
Maxillae
Definition
Complete or partial upper jaw consisting of one or two maxillary bones.
Term
Nasal
Definition
Paired facial bones forming bridge of nose.
Term
Lacrimal
Definition
Paired facial bone forming medial wall of orbit.
Term
Nasal Septum
Definition
Vomer and Perpendicular Plate of Ethmoid - Vertical partition of nasal cavity.
Term
Inferior Nasal Conchae
Definition
Paired facial bones projecting inwardly from maxillae forming walls of nasal cavity.
Term
Orbit
Definition
Eye cavity containing eyeball.
Term
What bone(s) make up the medial portion of the orbit?
Definition
Orbital portion of the ethmoid; lesser and greater wings of the sphenoid.
Term
Which bone(s) make up the posterior portion of the orbit?
Definition
Greater wing of sphenoid.
Term
Which bone(s) make up the lateral portion of the orbit?
Definition
Primarily zygomatic bone.
Term
Which bone(s) make up the floor of the orbit?
Definition
Primarily the maxilla and some of the zygomatic bone.
Term
Which bone(s) make up the roof of the orbit?
Definition
Formed primarily by the orbital plate of the frontal bone.
Term
Supraorbital Notch (foramen)
Definition
Notch on supraorbital ridge of frontal bone.
Term
Optic Foramen
Definition
Opening into the posterior orbit that contains the optic nerve.
Term
Superior Orbital Fissure
Definition
Elongated opening in the upper lateral part of the orbit between the greater and lesser wings of sphenoid.
Term
Inferior Orbital Fissure
Definition
Fissure between greater wing of sphenoid and each maxilla carrying infraorbital and zygomatic nerves, as well as infraorbital atery and inferior ophthalmic vein.
Term
Infraorbital Foramen
Definition
Foramen of each maxilla transmitting infraorbital nerve and blood vessels
Term
Nasal Aperture
Definition
Opening of the nasal cavity in the skull.
Term
Canine Eminence
Definition
Facial ridge of bone over maxillary canine.
Term
Canine Fossa
Definition
Fossa superior to the roots of maxillary canines.
Term
Intermaxillary Suture
Definition
Suture between two maxilla forming maxillae.
Term
Mental Foramen
Definition
Foramen between apices of mandibular first and second premolars transmitting mental nerve and blood vessels.
Term
Parietal
Definition
Paired cranial bone of the skull articulating with the same bone as well as with other skull bones.
Term
Temporal
Definition
Paired cranial bone forming lateral cranial walls and articulating with the mandible at TMJ
Term
Occipital
Definition
Single cranial bone in most posterior part of skull.
Term
Sphenoid
Definition
Single midline cranial bone consisting of body and processes.
Term
Ethmoid
Definition
Single midline cranial bone of skull.
Term
Mandible
Definition
Single facial bone articulating bilaterally with temporal bones at TMJ
Term
Coronal Suture
Definition
Suture between frontal and parietal bones.
Term
Squamosal Suture
Definition
Suture between temporal and parietal bones.
Term
Lamdoidal Suture
Definition
Suture between occipital and both parietal bones.
Term
Sagittal Suture
Definition
Suture between paired parietal bones.
Term
Temporal Fossa
Definition
Fossa on lateral surface of skull containing temporalis muscle.
Term
Mandibular Fossa
Definition
Depression on the inferior surface of the skull in the temporal bone that articulates with the condyle of the mandible.
Term
Articular Eminence
Definition
Eminence on temporal bone articulating with mandible at TMJ. Anterior to TMJ.
Term
Mastoid Process
Definition
Area on petrous part of temporal bone with air cells where cervical muscles attach.
Term
Styloid Process
Definition
Bony projection of temporal bone serving as attachment for muscles and ligaments.
Term
External Acoustic Meatus
Definition
Canal leading to tympanic cavity.
Term
Anterior Nasal Spine
Definition
Small projection of the maxillae at the bottom of the nasal aperture.
Term
Incisive Foramen
Definition
Foramen in maxillae carrying branches of right and left nasoplatine nerves and blood vessels marked by incisive papilla.
Term
Median Palatine Suture
Definition
Midline suture between palatine processes of maxillae and horizontal plates of palatine bones.
Term
Transverse Palatine Suture
Definition
Suture between palatine processes of maxillae and horizontal plates of palatine bones. Runs across the posterior part of hard palate.
Term
Greater Palatine Foramen
Definition
Foramen in palatine bone carrying greater palatine nerve and blood vessels. On either side of hard palate.
Term
Lesser Palatine Foramen
Definition
Foramen in palatine bone transmitting lesser palatine nerve and blood vessels. At posterior end of hard palate.
Term
Pterygoid Hamulus
Definition
Small curving process projecting down from the medial pterygoid plate of the sphenoid bone.
Term
Medial Pterygoid Plate
Definition
Thin wall of bone projecting back from the pterygoid process on the medial side
Term
Lateral Pterygoid Plate
Definition
Thin wall of bone projecting back from the pterygoid process on the lateral side.
Term
Pterygoid Fossa
Definition
Fossa between medial and lateral pterygoid plates of the sphenoid
Term
Foramen Ovale
Definition
Foramen in sphenoid carrying mandibular division of trigeminal or fifth cranial nerve.
Term
Foramen Spinosum
Definition
Foramen in sphenoid carrying middle meningeal artery.
Term
Carotid Canal
Definition
Canal in temporal bone carrying internal carotid artery among other vessels.
Term
Stylomastoid Foramen
Definition
Foramen in temporal bone carrying facial or seventh cranial nerve.
Term
Jugular Fossa
Definition
Depression between occipital and temporal bones with a foramen carrying the internal jugular vein and the ninth, tenth, and eleventh cranial nerves.
Term
Occipital Condyles
Definition
Projections of occipital articulating with lateral masses of first cervical vertebra.
Term
Crista Galli
Definition
Vertical midline continuation of perpendicular plate of ethmoid into cranial cavity
Term
Cribiform Plate
Definition
Horizontal plate of ethmoid perforated with foramina for olfactory nerves.
Term
Greater Wing of Sphenoid
Definition
Posterolateral process of the body of sphenoid.
Term
Lesser Wing of Sphenoid
Definition
Anterior process of the body of sphenoid.
Term
Hypophyseal Fossa
Definition
Saddle-shaped depression on the body of the sphenoid located in the middle cranial fossa containing the pituitary gland.
Term
Foramen Rotundum
Definition
Foramen in sphenoid carrying trigeminal or fifth cranial nerve.
Term
Anterior Cranial Fossa
Definition
The anterior part of the cranial cavity that houses the frontal lobes of the brain.
Term
Foramen Magnum
Definition
Foramen in occipital carrying spinal cord, vertebral arteries, eleventh cranial nerve.
Term
Jugular Foramen
Definition
Foramen between occipital and temporal bones carrying internal jugular vein and ninth, tenth, and eleventh cranial nerves.
Term
Internal Acoustic Meatus
Definition
Bony meatus in temporal bone carrying seventh and eighth cranial nerves.
Term
Petrous Portion of Temporal Bone
Definition
Inferior part of bone containing mastoid process and air cells.
Term
Middle Cranial Fossa
Definition
The middle concavity in the floor of the skull that houses the temporal lobes and base of brain.
Term
Posterior Cranial Fossa
Definition
The posterior depression in the cranial cavity, behind the petrous temporal bone.
Term
Sphenoid Sinuses
Definition
Paired sinuses in body of sphenoid.
Term
Pterygopalatine Fossa
Definition
Fossa deep to infratemporal fossa and between pterygoid process and maxillary tuberosity.
Term
Maxillary Sinus
Definition
Paranasal sinuses in each body of maxilla.
Term
What are the four processes of the maxillae?
Definition
Frontal Process of Maxilla ^^, Zygomatic Process of Maxilla <->, Alveolar Process of Maxilla , Palatine Process of Maxilla
Term
Maxillary Tuberosity
Definition
Elevation on posterior aspect of each maxilla perforated by posterior superior alveolar foramina.
Term
Hiatus of Maxillary Sinus
Definition
The opening from the middle meatus of the nasal cavity into the maxillary sinus.
Term
Lacrimal Groove
Definition
Groove in the lacrimal bone for the lacrimal duct.
Term
Body of Mandible
Definition
Horizontal part of mandible.
Term
Angle of Mandible
Definition
Angle at intersection of posterior and inferior borders of ramus
Term
Ramus
Definition
Plate of mandible extending superiorly from body of mandible.
Term
Alveolar Process
Definition
Part of the mandible and maxilla containing roots of teeth.
Term
Mental Protuberance
Definition
Mandibular bony prominence of chin
Term
Mandibular Condyle
Definition
Projection of bone from ramus participating in TMJ.
Term
Coronoid (mandibular) Notch
Definition
Notch in anterior border of ramus.
Term
External Oblique Line
Definition
Crest on lateral side of the mandible where the ramus joins the body.
Term
Mandibular Foramen
Definition
Foramen of mandible allowing inferior alveolar nerve and blood vessels to exit or enter mandibular canal.
Term
Mylohyoid Line
Definition
Line on medial aspect of mandible
Term
Sublingual Fossa
Definition
Fossa on medial surface of mandible containing sublingual gland.
Term
Submandibular Fossa
Definition
Fossa on medial surface of mandible containing submandibular gland.
Term
Mandibular Symphysis
Definition
Midline ridge showing fusion of mandibular processes.
Term
Retromolar Triangle
Definition
Part of mandibular alveolar process just posterior to most distal mandibular molar and covered by retromolar pad.
Term
Internal Oblique Line
Definition
Radiographic landmark
Term
Genial Tubercles
Definition
Midline bony projections or mental spines on medial aspect of mandible. On lingual behind 24 and 25.
Term
Digastric Fossa
Definition
Attachments of anterior
Term
Mylohyoid Groove
Definition
Groove on mandible where mylohyoid nerve and blood vessels travel.
Term
Lingula
Definition
Bony spine overhanging mandibular foramen.
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