Skull anatomy

Question 1

what does the skulls rigid framework enable muscles to do

Answer 1

oral and pharyngeal movements for:
speech, chewing, swallowing and breathing

Question 2

How many bones in the skull

Answer 2

22

Question 3

What are the cranial bones (neurocranium) -

Answer 3

ethomoid, frontal, parietals, occipital, temporals, sphenoid

STEPOF6
joined by joints called sutures

Question 4

what are the facial bones (viscerocranium)?

Answer 4

Paired: maxillae, palatines, zygomatics, nasals, lacrimals, inferior nasal conchae

unpaired: vomer, mandible

Question 5

What are all the bones of the head and neck

Answer 5

cranial bones,
facial bones,
ossicles (malleus, incus, stapes)
hyoid, spine (vertebrae)

Question 6

Cranium fossa

Answer 6

anterior fossa - houses the frontal lobe
middle fossa - houses the temporal lobe
posterior fossa - houses the cerebellum

Question 7

Cranial bones paired vs unpaired

Answer 7

paired: parietal, temporal bones
unpaired: frontal, occipital, sphenoid, ethmoid bones

Question 8

cranium sutures

Answer 8

coronal suture ‘crown’
sagittal suture ‘midline’
metopic suture ‘forehead’
lambdoid suture ‘lambda-shaped’
squamous suture ‘scaly’
pterion ‘wing’

Question 9

What makes up the ethmoid bone in the cranium?

Answer 9

consists of 4 parts:

1) perpendicular plate
2) cribriform
3) ethmoidal labyrinths
4) crista galli

ethmoid bone sits anterior to the sphenoid bone (in front of)

Question 10

perpendicular plate

Answer 10

forms upper portion of nasal septum

articulates:

Question 11

cribriform

Answer 11

separates nasal cavities from the anterior cranial fossa

perforated plate allowing olfactory nerves on CN I into nasal cavity

articulates:

Question 12

ethmoidal labyrinths

Answer 12

enclose ethmoid air cells (trap air)

divided from orbits by lamina papyracea

form ethmoid paranasal sinuses

forms middle and superior conchae

articulates:

Question 13

crista gallis

Answer 13

“rooster’s comb”
most superior structure of the ethmoid bone

articulates:

Question 14

Sphenoid Bone in the cranium (butter fly shaped)

Answer 14

articulates with most cranial and facial bones

is at the base of the skull

cube shaped body with projections

greater wings (alae) curve upward, partially hosue the eye, form form anterioir floor of the middle cranial fossa

pituitary gland sits on the superioir surface

pterygoid processes (wing-shaped) extend inferioirly consisting of two lateral and medial plates, some masticatory muscles attach to the lateral pt. plate

hamulus is an important hook: is an attachment point for some pharyngeal muscles