72 terms

bones of the skull

use for pharynx/articulation section
number of bones in the skull
22, some paired and unpaired
immovable joints
skull divides into two parts
facial and cranial
lower jaw
paired bone with a symphasis
name the parts of the mandible
body, alveolar arch, angle, ramus, coronoid process, condylar process
anterior arch of the mandible
body aka corpus
upper ridge that houses the teeth
alveolar arch
point where arch stops and changes directions on the mandible
superior, lateral, posterior projection of arch of the mandible
anterior process at top of ramus, point of muscle attachment, deep to zygomatic process
coronoid process
posterior process at the top of ramus, point of articulation with temporal bon at TMJ
condylar process
name all the facial bones of the skull
mandible, maxillae, nasal bones, palatine bones, lacrimal bones, zygomatic bones, inferior nasal conchae, vomer
paired bone that forms the upper jaw
bone of the jaw that doesnt move
maxillae forms what
roof of mouth, floor and lateral walls of the nasal cavity, floor of the orbits
roof of mouth, floor and lateral walls of the nasal cavity, floor of the orbits
roughly pyramidal body and has four main parts
name the parts of the maxillae
zygomatic process, frontal process, palatine process, alveolar process
articulates with the zygomatic bone superiorly and laterally, b/w anterior and posterior surfaces on later aspect of bone
zygomatic process
superiorly directed plate ont eh anterior surface, articulates with the frontal bone
frontal process
horizontal plate directed medially, articulates with the opposite side to form anterior 2/3 or 3/4 of hard palate, fused at midline
palatine process
inferiorly directed process that ccontains teeth
alveolar process
what forms the brigde of the nose
nasal bones
desribe the nasal bones
2 small oblong bones, fused at midline (left and right), lie medial to the frontal processes of the maxillae, articulate with frontal bone, maxillae, and other bones of the nose
2 small oblong bones, fused at midline
nasal bones
fused superiorly to the frontal bone
nasal bones
horosontal plate/ small but complex
palatine bones
describe the palatine bones
located at the back of the nasal cavity,
contributes to posterior floor and lateral wall of nasal cavity,
posterior 1/4 of hard palate
floor of orbit
has the posterior nasal spine
the posterior projection of the palatine/landmark for x-rays
posterior nasal spine
located at the back of the nasal cavity and creates 1/4 of the hard palate
palatine bone
smallest of the facial bones
lacrimal bones
forms part of the medial wall of the orbital cavity
lacrimal bones
your check is formed how?
zygomatic arch=zygomatic process of maxilla and temporal bones
roughly quadrilateral body, bone of the facial skeleton
zygomatic bone
name the four processes of the zygomatic bone, and what bones do they attach with?
maxillary process
frontosphenoidal process
orbital process
temoporal process
the process goes with the corrosponding bone
what 2 bones make up the hard palate
maxillae an palatin
makes up the most inferior part of lateral nasal walls, paired
inferior nasal conchae
articulates anteriorly with the maxillae and posteriorly with palatine bone
inferior nasal conchae
inferior half or bone nasal septum
articulates inferiorly with the maxialla and palatine bones
anterior border articulates with cartilaginous septum on nose
name all the bones of the cranial skeleton
parietal bone
occipital bone
temporal bone
sphenoid bone
describe the ethmoid bone
very thin bone
articulates with 15 bones
contributes to orbit and nasal cavities
has four major parts
name the 15 bones that articulate with the ethmoid bone
inferior nasal conchae
name all the parts of the ethmoid
cribiform plate
crista galli
ethmoid labyrinth
horizontal plate separates cranial and nasal cavities: forms rof of nasal cavities
cribiform plate
superior prjection from cribiform plate; triangular process that seperates the cranial hemisphere ( separates the 21/2's of the brain)
crista galli
think walled, with variable air pockets, lightens the weight of the skull
ethmoid labyrinth
lateral portion of the ethmoid labyrinth
comprised of 2 lateral plates that house the superior and medial nasal conchae, form lateral walls of nasal cavity
describe the frontal bone
anterior part of the brain case
vertical plate (forehead) horizontal aspect that contributes to the rood of the orbit and nasal cavity
consists of a vertical plate and contributes to the roof of the orbits and nasal cavities
frontal bone
the midline notch of the frontal bone
and what does it articulate with?
ethmoid notch, articulates with the ethmoid bone
lateral to the orbital surfaces for articulation to the zygomatic bone
zygomatic process
section above the orbits, located where the eye brows are, part of what bone
supraortbital rim, frontal bone
AKA cranial vault
parietal bone
describe the parietal bone
paired bone
joined at the sagittal suture
forms the rounded roof of cranium
roughly quadrilateral
very little muscle attachment
articulates with frontal bone and coronal suture
joined at sagittal suture cranial vault
parietal bone
decribe the occipital bone
allows head movement
forms the inferior and posterior portion of the cranium
where spinal cord leaves the brain and what bone is this located
occipital bone located, FORAMEN MAGNUM
what is lateral to the foreman magnum and what does it does it articulate with?
lateral condyles, articulates with C1
describe the temporal bone
paired bone
forms lateral base
some sides of the cranium
3 main parts:
squamous portion
petrous portion
tympanic portion
portion that lateral, anterior, and superior aspects
articulates with the temporal process of zygomatic bone and partietal bone
squamous portion
located at the base of the skull,
houses hearing and balance organs
petrous portion
infront of mastiod process
forms part of external auditory canal
tympanic portion
describe the sphenoid bone
articulates with all bones of the cranial skeleton
3 of the facial, vomer.palatines, and zygomatics
located at base of skull
anterior to foramen magnum
looks like a bat
thin bone
four parts: body/lesser wings/greater wings/pterygoid processes
bone located at base of skull
anterior to foreman magnum
sphenoid bone
anterior surface of bone that forms the posterior wall of nasal cavity
body of sphenoid
laterally directed plates contribute to superior wall of orbits, part of a cranial bone
lesser wings of sphenoid bone
directed laterally/curved/1/2 of the lateral orbit wall
greater wings of sphenoid bone
attachmen for pterygoid muscles, deviedes into lateral medial plates, medial terminates at _____what?
pterygoid process