Unit 4 - Head and Neck: Bones of the Skull (Ex. III) Flashcards Preview

Gross Anatomy '15 Ex. III > Unit 4 - Head and Neck: Bones of the Skull (Ex. III) > Flashcards

Flashcards in Unit 4 - Head and Neck: Bones of the Skull (Ex. III) Deck (21)
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1

calvaria bones

frontal bone
occipital bone
parietal bones

2

layers of calvaria

outer table --> dense layer
diploe layer --> middle
inner table --> thin layer

3

viscerocranium (14)

maxillae
mandible
nasal bones
lacrimal bones
zygomatic bones
palatine bones
vomer
inferior nasal conchae

4

What does the frontal bone form?

forehead
orbit:
- roof
- S rim
floor of A cranial fossa

5

What do the parietal bones form?

S-L parts of calvaria
--> house middle meningeal aa. and S sagittal sinus

6

What is notable about the occipital bone?

forms P cranial fossa
A portion: clivus
foramina:
- foramen magnum
- jugular foramina
- condylar canals
occipital condyles
grooves for sigmoid and transverse dural sinuses
S and I nuchal lines and EOP externally

7

What do the temporal bones form?

part of middle and P cranial fossae
squamous part (outer) ==> L skull
petrous part (inner) ==> encloses middle and inner ear
tympanic part ==> encloses external auditory canal and tympanic membrane

8

processes of T bones

mastoid process --> air cells
P part of zygomatic arch
styloid process

9

foramina of T bones

internal and external acoustic meati
carotid canal
stylomastoid foramen

mandibular fossa and articular tubercle articulate w/ mandible

10

sphenoid bone

forms:
- P part of orbit
- floor and L wall of middle cranial fossa between F and T bones
greater wings ==> form parts of middle cranial fossa and L walls of skull
lesser wings ==> form P part of A cranial fossa - end in A clinoid processes
body encloses sphenoid sinus
sella turcica ==> hypophysis in hypophyseal fossa
pterygoid processes w/ M and L pterygoid plates project I
openings:
- optic canals
- S orbital fissures
- foramina rotundum
- foramina ovale
- foramina spinosum

11

ethmoid bone

forms:
- part of A cranial fossa
- M walls of orbits
- parts of nasal septum and L nasal walls
cribriform plate - in A cranial fossa above nasal cavity
perpendicular plate --> part of nasal septum
processes:
- crista galli - S
- S and middle nasal concha I on L wall of nasal cavity
ethmoidal air cells ==> ethmoid sinuses

12

neurocranium (8)

frontal bone
parietal bones
occipital bone
temporal bones
sphenoid bone
ethmoid bone

13

What do the maxillae form?

upper jaw
floors of orbits
parts of nose and palate

14

What do the maxillae contain?

maxillary dental arch --> alveoli for upper teeth
palatine processes --> A part of palate
frontal processes --> part of external nose
infraorbital foramen
maxillary sinus - below orbit

15

mandible

forms lower jaw
body - articulates P w/ vertical ramus ==> forms angle
coronoid process on S end of ramus - mandibular notch separates it from P condylar process
head of condylar process articulates w/ mandibular fossa of T bone
foramina:
- mental foramen externally
- mandibular foramen internally
mandibular dental arch ==> alveoli for lower teeth

16

What do the nasal bones form?

bridge of nose

17

What do the lacrimal bones form?

A M walls of orbits ==> contain fossae for lacrimal sacs

18

What do the zygomatic bones form?

bony prominences of cheeks
A parts of zygomatic arches
L walls of orbits

19

What do palatine bones form?

P L walls of nasal cavity via vertical parts of the bones
P parts of palate via horizontal processes

20

What does the vomer form?

I and P part of nasal septum

21

What do the I nasal conchae form?

lowest scroll-like processes on L walls of nasal cavity

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