The bones of the skull protect the brain
The bones of the skull protect the brain and guard the entrances to the digestive and respiratory systems. steven lee M. S. Pathology FTCC
steven lee M. S. Pathology FTCC
Frontal bone Zygomatic bone maxilla vomer steven lee M. S. Pathology FTCC mandible
Frontal bone Zygomatic Process (frontal bone) Supraorbital Foramen (frontal bone) Glabella (frontal bone) Supraorbital Margin (frontal bone) Infraorbital foramen (maxillary bone) Middle nasal concha (ethmoid bone) Perpendicular plate (ethmoid bone) maxilla Alveoli processes (maxillary bone) vomer steven lee M. S. Pathology FTCC Inferior nasal concha mandible Alveoli processes (mandible)
Frontal eminence Superciliary arch (frontal bone) steven lee M. S. Pathology FTCC
steven lee M. S. Pathology FTCC
Middle na (ethmoi sal concha d bone) ncha Inferior nasal co steven lee M. S. Pathology FTCC Perpendicular plate (ethmoid bone) Infraorbital foramen (maxillary bone) vomer
steven lee M. S. Pathology FTCC
Optic foramen or canal (sphenoid bone) e sur fis tal rbi ) r o ne rio id bo pe Su heno (sp e r su steven lee M. S. Pathology FTCC fis l ita ne) b or bo r y rio llar e f i In ax (m
When the supraorbital foramen is not completely enclosed by bone, there is a supraorbital notch, rather than a foramen, on the orbital rim, as is the case for this specimen. steven lee M. S. Pathology FTCC
Optic canals permit passage of the optic nerves from the eyes to the brain. steven lee M. S. Pathology FTCC
The inferior orbital fissure permits passage of cranial nerves and blood vessels. steven lee M. S. Pathology FTCC
The superior orbital fissure permits passage of cranial nerves and blood vessels to the orbit steven lee M. S. Pathology FTCC
steven lee M. S. Pathology FTCC
Frontal bone Parietal bone Occipital bone l sa na l lacrima Temporal bone maxilla mandible steven lee M. S. Pathology FTCC Zygomatic bone
steven lee M. S. Pathology FTCC Frontal bone Coronal suture Zygomatic process (frontal bone) Parietal bone Frontal process (zygomatic bone) Occipital bone l sa na l lacrima Zygomatic process (Temporal bone) Condylar process (mandible) External auditory meatus (temporal bone) maxilla Temporal process Zygomatic bone ramus Coronoid process (mandible) External occipital protuberance Mastoid process (temporal bone) Styloid process (temporal bone) angle mandible
steven lee M. S. Pathology FTCC
Supra meatal triangle Mandibular condyle Post glenoid process External auditory meatus (temporal bone) Tympanic part mandible Mastoid process (temporal bone) steven lee M. S. Pathology FTCC Styloid process (temporal bone)
steven lee M. S. Pathology FTCC
Frontal bone Zygomatic process (frontal bone) Sphenoid bone ne o b al Frontal process (zygomatic bone) maxilla e mandible notch on ibular Coronoid process (mandible) lb Mand sa cess o r c p ro ne) atic ne) p m l o ra ic bo Zyg oral bo o p mp mat Zygomatic bone e (tem T go (zy Condylar process (mandible) steven lee M. S. Pathology FTCC Ethmoid bone Na Zygomatic arch Lacrimal bone por m Te
steven lee M. S. Pathology FTCC
Sagittal suture Parietal bone Occipital bone External occipital protuberance Middle nuchal line Condyloid canal steven lee M. S. Pathology FTCC Lambdoidal suture Superior nuchal line Inferior nuchal line Mastoid process (temporal bone) Styloid process (temporal bone)
steven lee M. S. Pathology FTCC
Frontal bone Coronal suture Parietal bone Sagittal suture Parietal bone steven lee M. S. Pathology FTCC Occipital bone
steven lee M. S. Pathology FTCC
Lesser wing (sphenoid bone) Greater wing (sphenoid bone) Jugular foramen Mastoid foramen steven lee M. S. Pathology FTCC Foramen magnum surrounds the connection between the brain and spinal cord. Hypoglossal canals
Location of foramen rotundum (sphenoid bone), although not shown on this model Foramen lacerum (sphenoid bone) Foramen spinosum (sphenoid bone) Greater wing (sphenoid bone) Pe (te tro m us po po ra rti l b on on e) Foramen ovale (sphenoid bone) Lesser wing (sphenoid bone) Foramen magnum Pe (te trous mp po ora rti l b on on e) Internal occipital crest Internal occipital protuberance steven lee M. S. Pathology FTCC
steven lee M. S. Pathology FTCC
Cribiform plate (ethmoid bone) Lesser wing (sphenoid bone) Sulcus chiasmatis Tuberculum sellae Sella turcica (sphenoid bone) steven lee M. S. Pathology FTCC Fossa hypophysis Dorsum sellae Crista galli (ethmoid bone)
Crista galli (ethmoid bone) The falx cerebri, a membrane that stabilizes the position of the brain, attaches to this ridge. Lesser wing (sphenoid bone) Greater wing (sphenoid bone) Sella turcica (sphenoid bone) steven lee M. S. Pathology FTCC
steven lee M. S. Pathology FTCC
Optic canal (sphenoid bone) The hypophyseal fossa, the depression within the sella turcica houses and protects the pituitary gland. steven lee M. S. Pathology FTCC
steven lee M. S. Pathology FTCC
Lesser wing (sphenoid bone) Petrous portion (temporal bone) Lacrimal canal nasal (lacrimal bone) Alveoli processes (maxillary bone) Sq u (te amo mp us ora po l b rtio on e) n mandible steven lee M. S. Pathology FTCC body Internal acoustic canal (temporal bone) ramus angle Mastoid process (temporal bone)
steven lee M. S. Pathology FTCC
m io s rou Pet rt po te n( ra po l n bo e) Internal auditory meatus (temporal bone) The internal auditory canal (meatus) carries blood vessels and nerves to the inner ear. steven lee M. S. Pathology FTCC
steven lee M. S. Pathology FTCC
Zygomatic arch ma nd ibl e Palatine bones Palatine process (maxilla) Foramen magnum steven lee M. S. Pathology FTCC Occipital condyles External occipital ptotuberance
Occipital condyles are the site of articulation between the skull and the 1 st cervical vertebrae (atlas). steven lee M. S. Pathology FTCC Occipital condyles
steven lee M. S. Pathology FTCC
mandible Palatine process (maxillary bone) steven lee M. S. Pathology FTCC Palatine bone
steven lee M. S. Pathology FTCC
Pterygoid processes lateral medial lateral Pterygoid plates (sphenoid bone) vomer steven lee M. S. Pathology FTCC Foramen magnum
steven lee M. S. Pathology FTCC
id proce ss maxilla Maxillary alveoli processes ess roc rp yla Corono nd Co Mandibular notch steven lee M. S. Pathology FTCC ramus Oblique line M Mental foramen Mandibular alveoli processes an di b ul ar body an g le mandible Mental protuberance
steven lee M. S. Pathology FTCC temporalis buccinator masseter mentalis
steven lee M. S. Pathology FTCC
Maxillary bone Alveoli processes steven lee M. S. Pathology FTCC mandible
steven lee M. S. Pathology FTCC FETAL SKULL
Metopic suture steven lee M. S. Pathology FTCC At birth, there are 2 frontal bones that articulate along the metopic suture. Although the suture generally disappears by age 8 as the bones fuse, the adult skull commonly retains traces of the suture line.
steven lee M. S. Pathology FTCC
Frontal fontanel (anterior) Parietal bone Frontal bone steven lee M. S. Pathology FTCC Parietal bone
steven lee M. S. Pathology FTCC
Parietal bone Occipital fontanel (posterior) Occipital bone steven lee M. S. Pathology FTCC
steven lee M. S. Pathology FTCC
Parietal bone Sphenoidal fontanel (anterolateral) steven lee M. S. Pathology FTCC Mastoidal fontanel (posterolateral)
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