L2 - the skull

Question 1

how many bones are there in the skull

Answer 1

22

Question 2

which is the only synovial joint in the skull

Answer 2

temporomandibular join

Question 3

role of the sinuses

Answer 3

• lighten the weight of the skull
• filter and humidify air
• resonate boice

Question 4

sinuses

Answer 4

• sphenoid
• ethmoid air cells
• frontal
• maxillary

Question 5

where does the sphenoid sinus drain into

Answer 5

superior meatus

Question 6

where do the ethmoid air cells drain into

Answer 6

superior meatus

Question 7

where does the frontal sinus drain into

Answer 7

middle meatus

Question 8

where does the maxillary sinus drain into

Answer 8

middle meatus

Question 9

what drains into the superior meatus

Answer 9

sphenoid

ethmoid air cells

Question 10

what drains into the middle meatus

Answer 10

maxillary

frontal

Question 11

what drains into the inferior meatus

Answer 11

contents of the nasal lacrimal duct

Question 12

location of pituitary gland

Answer 12

sits on top of the sphenoid bone

Question 13

external auditory canal

Answer 13

connects external ear with the middle ear

Question 14

tympanic membrane

Answer 14

covers the external auditory canal

Question 15

which membrane covers the external auditory canal

Answer 15

tympanic membrane

Question 16

why are the skulls of newborns different

Answer 16

bones are not fused together

- results in large membraneous areas called fontanelles

Question 17

fontanelles

Answer 17

membraneous areas in newborns resulting from the absence of bones fusing together

Question 18

importance of fontanelles

Answer 18

• to allow the slight deformations during birth through the birth canal
• to accommodate brain growth post-natally

Question 19

functions of cribriform plate

Answer 19

allow the passage of olfactory nerves

Question 20

cribriform plate

Answer 20

holes in ethmoid bone

Question 21

petrous temporal bone

Answer 21

separates the middle and posterior cranial fossa

Question 22

where is the anterior cranial fossa located?

Answer 22

frontal lobe

Question 23

where is the middle cranial fossa located?

Answer 23

temporal lobe

Question 24

where is the posterior cranial fossa located?

Answer 24

cerebellum and brainstel

Question 25

crista galli

Answer 25

forms an important attachment for the dura mater

Question 26

where is the crista galli located

Answer 26

ethmoid bone

Question 27

foramen in the skull

Answer 27

- cribriform plate - superior orbital fissure - optic canal - foramen lacerum - internal auditory canal - hypoglossal canal - foramen magnum - jugular foramen - ROS - internal orbital fissure - intra-orbital foramen - pituitary fossa - stylomastoid foramen - carotid canal

Question 28

what do sphenoid ridges separate

Answer 28

the anterior cranial fossa and the middle cranial fossa

Question 29

ROS

Answer 29

- foramen rotundum - foramen ovale - foramen spinosum

Question 30

foramen lacerum

Answer 30

not natural in living people as is covered by a layer of cartilage

Question 31

what sits in the pituitary fossa

Answer 31

the pituitary gland

Question 32

function of optic canal

Answer 32

allows for the passage of the optic nerve

Question 33

functions of superior orbital fissure

Answer 33

allows for passage of: - oculomotor nerve - trochlear nerve - abducens nerve - ophthalmic branch of the trigeminal nerve

Question 34

functions of foramen rotundum

Answer 34

allows for passage of maxillary branch of trigeminal nerve

Question 35

functions of foramen ovale

Answer 35

allows for passage of mandibular branch of trigeminal nerve

Question 36

functions of foramen spinosum

Answer 36

allows for passage of middle meningeal artery into the cranial cavity

Question 37

functions of internal acoustic canal

Answer 37

allows for passage of: - facial nerve - vestibotrochlear nerve

Question 38

functions of jugular foramen

Answer 38

allows for the passage of: - internal jugular vein - glossopharyngeal nerve - vagus nerve - spinal accessory nerve

Question 39

functions of hypoglossal canal

Answer 39

allows for passage of the hypoglossal nerve

Question 40

where is the hypoglossal canal located

Answer 40

tucked under the occipital condyles

Question 41

functions of foramen magnum

Answer 41

allows for passage of the spinal cord

Question 42

what makes up the hard palatte

Answer 42

- horizontal process of the maxilla | - palatine bones

Question 43

flat parts of sphenoid bone

Answer 43

medial and lateral pterygoid plates

Question 44

location of occipital condyles

Answer 44

vertebrae 1 (c1)

Question 45

functions of stylomastoid foramen

Answer 45

allows passage / exit of facial nerve so it can innervate the face

Question 46

functions of the carotid canal

Answer 46

allows for entry of the carotid artery

Question 47

location of the carotid canal

Answer 47

medial to the stylomastoid foramen