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Skull Facial Bones

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
What are the 2 divisions of the skull? How many bones each/total   show
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show The Calvaria (cap) & the Floor--4 bones each  
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Name the 4 Calvaria Cranial bones:   show
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show Ethmoid; Sphenoid; R. & L. Temporal  
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show Diploe--inner spongy/cancelleous layer separating 2 outer plates of compact cortical bone Has Meningeal Grooves (narrow branchlike grooves which cover the internal surface of the bones (=sm grooves) Sulci-larger channels which lodge blood vessels(large  
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What are the 3 regions of the Floor of the Skull? How are they divided?   show
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show The Petrous Ridges on the Temporal Bone  
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Name the 14 Facial Bones:   show
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Do the 2 Nasal bones articulate with the Lacrimal bones?   show
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What bones make up the majority of the hard pallate?   show
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What bones comprise our cheek bones?   show
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What are the purpose of the nasal conchae? Are they considered Facial or Cranial bones?   show
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Where are the Palantine bones located?   show
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show Meets with the Maxilla in the front & the Ethmoid Perpendicular Plate in the back  
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What are the classifications of sutures?   show
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show Joints that connect the cranial & facial bones  
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show CORONAL--between frontal/parietal bones; SAGITTAL--top of head between 2 parietal bones; 2 SQUAMOSAL--between temporal/parietal bones R/L; LAMDOIDAL--between occipital/parietal bones  
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show BREGMA--coronal/sagittal suture junction; LAMBDA--sagittal/lambdoidal; 2 PTERION--Anterior junction of the squamosal,parietal, & sphenoid; 2 ASTERION--Posterior junction of Squamosal: occipital, parietal, mastoid portion of temporal bone  
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What are Fontanels? How many?   show
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show 12 years old  
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At what age range is the skull developing?   show
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show Anterior (Bregma) Posterior (Lambda) 2 Mastoid (Asterion) 2 Sphenoidal (Pterion)  
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show Metopic--extends vertically along midline of frontal bone; 2 Mendosal--pass obliquely upward on the back of the occipital bone  
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What does it mean if an infant's fontanels are sunken in?   show
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show Too much cranial pressure  
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show When sutures prematurely go away. It inhibits brain growth--may need surgery to re-open. Can cause Microcephalus  
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What is Acephalus?   show
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show 2 heads (siamese twins)  
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show Big head. Can also have Hydrocephalus (water).  
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What is Hydrocephalus?   show
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show Small head--can be caused by craniostosis.  
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show Deviation in the palatine bone (no bone).  
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show Extends from the anterior frontal bone to the lesser wings of the sphenoid. Houses the frontal lobes of cerebrum  
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Describe the Middle Cranial Fossa & what it contains:   show
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show A deep depression posterior to the petrous ridges. It protects the cerebellum, pons, & medulla oblongata (where spinal cord passes).  
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What are the 6 ASPECTS of the skull?   show
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What is morphology?   show
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show Mesocephalic: Petrous Pyramids project anteriorly & medially 47° from MSP (Petrous pyramids=thickest portion of skull --on temporal bone)  
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Describe the Bracycephalic skull:   show
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show Petrous pyramids project anteriorly & medially 40° from MSP. (-7 of typical) (Long from front to back; Narrow side/side; deep from vertex (crown) to base (inf. surface).  
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Why must skull morphology be considered in positioning?   show
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Define Vomer:   show
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show Tear  
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Define Aveoli:   show
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show Flat part of bone  
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What are the 2 purposes of the Facial bones?   show
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show Squamosal  
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Which 2 sutural junctions are pairs?   show
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