Skull
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Transcript of Skull
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TTHE HE SSKULLKULL
Panjit ChunhabunditPanjit Chunhabundit, Ph.D., Ph.D.Department of Anatomy, Faculty of Dentistry, Department of Anatomy, Faculty of Dentistry, MahidolMahidol UniversityUniversity
DTAN 601 and DTAN 711DTAN 601 and DTAN 711
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IINTRODUCTIONNTRODUCTION
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DDEVELOPMENT EVELOPMENT OOF F TTHE HE SSKULLKULL
IntramembranousIntramembranous ossificationossification
EndochondralEndochondral ossificationossification
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NeurocraniumNeurocranium
ViscerocraniumViscerocranium
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Development ofDevelopment of NeurocraniumNeurocraniumCartilagenousCartilagenous NC.:NC.: base of skullbase of skullMembranous NC.:Membranous NC.: frontal & parietal bonesfrontal & parietal bones
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Development ofDevelopment of ViscerocraniumViscerocraniumCartilagenousCartilagenous VC.:VC.: malleusmalleus, , incusincus, stapes,, stapes,
styoidstyoid processprocessMembranous VC.:Membranous VC.: maxilla, maxilla, zygomaticzygomatic,, squamous squamous
temporal bone, mandibletemporal bone, mandible
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FontanelleFontanelle
-- AnteriorAnterior
-- PosteriorPosterior
-- AnterolateralAnterolateral((sphenoidalsphenoidal))
-- PosterolateralPosterolateral(mastoid)(mastoid)
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The Vault of the SkullThe Vault of the Skull((ClavariaClavaria))
- Frontal bonemetopic suture
- Parietal bone
- Squamous part of temporal
bone
- Occipital bone
Pterion
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The Base of the SkullThe Base of the Skull
Anterior cranial Anterior cranial fossafossa-- Orbital plate of frontal boneOrbital plate of frontal bone-- CribiformCribiform plate ofplate of ethmoidethmoid bonebone-- Lesser wing of sphenoid boneLesser wing of sphenoid bone
contain frontal lobecontain frontal lobe
Middle cranial Middle cranial fossafossa- Lesser wing of sphenoid bone- Temporal bone- Petrous part of temporal bonecontain temporal lobe & pituitarycontain temporal lobe & pituitary
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Posterior cranial Posterior cranial fossafossa-- PetrousPetrous part of temporal bonepart of temporal bone-- Occipital boneOccipital bone
contain cerebellumcontain cerebellum
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ViscerocraniumViscerocranium(Facial skeleton)(Facial skeleton)
-- compose of 14 pieces of bonescompose of 14 pieces of bones-- fragile & light weightfragile & light weight
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The Newborn SkullThe Newborn Skull-- the brain reach 25% of its adult size at birththe brain reach 25% of its adult size at birth-- reach 75% by the age of 4 yrsreach 75% by the age of 4 yrs-- has relatively small size of facehas relatively small size of face-- the nasal cavity is largely between the orbitsthe nasal cavity is largely between the orbits-- many separate parts of bones of base of skull many separate parts of bones of base of skull
still united with cartilagestill united with cartilage
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Skull MalformationsSkull MalformationsAcraniaAcrania or or CranioschisisCranioschisis
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CraniosynostosisCraniosynostosis or or CraniostenosisCraniostenosis
ScaphocephalyScaphocephaly OxycephalyOxycephaly
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The EndThe Endhttp://www.http://www.dtdt..mahidolmahidol.ac..ac.thth//wwwrootwwwroot//anatomyanatomy.html.html