intro to the skull Flashcards
define cranium
skeleton of the head
included in the neurocranium
bony case of brain and meninges
included in the viscerocranium
fascial skeleton
content of the neurocranium
- brain
- meninges
- cranial nerves (proximal)
- vasculature of the brain
name fossas of the neurocranium
- anterior cranial fossa
- midddle cranial fossa
- posterior cranial fossa
name of the floor of the neurocranium
cranial base - basicranium
name of the roof of the neurocranium, and bones involved
- calvaria (skullcap)
- flat bones –> frontal, parietal and occipital
single bones in the neurocranium
- frontal
- ethmoid
- sphenoid
- occipital
bony sets in the neurocranium
- temporal bones
- parietal bones
what characterizes a single bone
centered around the midline
what characterizes a bony pair
occur as bilateral pairs
what are pneumatized bones
bones that contain air spaces/cells/large sinuses
- decreases weight
pneumatized bones in neurocranium
- frontal
- ethmoid
- sphenoid
- temporal
bony processes on temporal bone
- mastoid process
- styloid process
name singular bones in the viscerocranium
mandible, ethmoid, vomer
name the paired bones in the viscerocranium
- maxilla
- inferior nasal concha
- zygomatic
- palatine
- nasal
- lacrimal
bones of viscerocranium that make up the nasal cranium
- perpendicular plate of the ethmoid bone
- vomer
bones that make up the hard palate
- maxilla
- palatine
parts of the ethmoid bone
- crista gali
- cribriform plate
- perpendicular plate
portions of the palatine bones
- horizontal
- perpendicular
parts of ethmoid and palatine when vomer and perpendicular plate of ethmoid is removed
ethmoid –> crista gali, cribriform plate, superior nasal concha, middle nasal concha
palatine bone –> perpendicular plate, horizontal plate
- inferior nasal concha also seen
