4-2 articulation & the skull Flashcards
ethmoid bone
forms root of nasal cavity
unpaired
cranial & facial
crista galli
superior & middle concha
cribriform, perpendicular, & orbital plate
superior & middle concha
folds in the bone
increase surface area of nasal cavity
perpendicular plate
divides left & right nasal cavity
cribriform plate
olfactory nerves go through the holes
frontal bone
unpaired
cranial
squamos & orbital portions
frontal bone connections
to parietal bones – coronal suture
to nasal bones – nasal portion
to zygomatic bones – zygomatic process
parietal bones
paired bones – articulate w/ each other @ sagittal suture
cranial
parietal bone connections
to occipital bones – lamboidal suture
to frontal bones – coronal suture
to temporal bones – squamosal suture
to sphenoid bones –
occipital bone
unpaired
cranial
squamos, basilar, & 2 lateral portions
2 condoyles – articulatory facets for C1 vertebra (atlas); inferior surface
foramen magnum
big hole for spinal cord
part of the basilar
occipital bones connections
to parietal bones – lamboidal suture
to temporal bones – occipitomastoid suture
to sphenoid bones – basilar part
temporal bones
paired
cranial (&facial)
squamos portion
petrous portion
tympanic portion
zygomatic portion
mastoid process
styloid process
each temporal bone articualtes w/ mandible via temporomadibular joint (TMJ) – connection at mandibular fossa
temporal bone connections
zygomatic – zygomatic process
mandible – temporomadibular joint
occpital – occipitomastoid suture
parietal – squamous suture
sphenoid – sphenosquamosal suture
sphenoid bone
butterfly shaped
paired
cranial
body
2 greater wings
2 lesser wings
2 pterygoid processes (lateral & medial plate each)
articulates w/ all cranial bones & several facial bones
mandible
unpaired
facial
largest & strongest facial bone
only movable bone of the skull – temporomandibular joint; 6 degress of freedom
body, ramus, & angle
