Skull and Cranial Cavity

Question 1

Nasion is formed by fusion of which three bones?

Answer 1

Two nasal and one frontal bone

Question 2

Pterion is formed by fusion of which four bones?

Answer 2

Temporal, Frontal, Parietal and Sphenoid

Question 3

Asterion is formed by junction of which three bones?

Answer 3

Occipital, Parietal and Tempooral

Question 4

Which artery runs beneath Pterion?

Answer 4

Anterior division of middle meningeal artery

Question 5

Coronoid process of the mandible is the point of attachement for which muscle?

Answer 5

Temporalis Muscle

Question 6

What is the most prominent point of external occipital protruberance called?

Answer 6

Inion

Question 7

where is mastoid notch located and what muscle attaches to it?

Answer 7

Inferomedial border of mastoid process, and posterior belly of digastric attaches here

Question 8

What is the junction of coronal and sagittal suture called?

Answer 8

Bregma

Question 9

What is the junction of sagittal and lambdoid suture called?

Answer 9

Lamda

Question 10

What two bones form the hard palate?

Answer 10

Maxilla (palatine process) and Palatine bone (horizontal plate)

Question 11

Sutures in between the two palatine process of the maxilla is called?

Answer 11

Intermaxillary suture

Question 12

Suture between the maxillae and palatine bones is called?

Answer 12

palatomaxillary suture

Question 13

Suture between the palatine bones in the midline is called?

Answer 13

Interpalatine Suture

Question 14

What three foramina are there in the anterior part of the skull base, in inferior view?

Answer 14

Incisive Foramen
Greater palatine foramen
Lesser palatine foramen

Question 15

Pterygoid processes are part of which bone and located where?

Answer 15

Sphenoid, and immediately lateral to each choana

Question 16

What three bones form foramen lacerum?

Answer 16

Sphenoid, Occipital and Temporal

Question 17

What bone are foramen ovale and spinosum part of?

Answer 17

Sphenoid (greater wing)

Question 18

Carotid canal is in which bone?

Answer 18

Temporal

Question 19

What bone are the condylar and hypoglossal canal in?

Answer 19

Occipital

Question 20

What two bones form the jugular foramen?

Answer 20

Occipital and temporal

Question 21

Where is the stylomastoid foramen located?

Answer 21

in temporal bone, between, mastoid process and styloid process.

Question 22

What do the granular foveolae on the inside of the skull mark?

Answer 22

location of arachnoid granulations

Question 23

What attaches on the frontal crest?

Answer 23

falx cerebri

Question 24

What bones form the anterior cranial fossa?

Answer 24

Frontal, ethmoid, sphenoid

Question 25

Where is the foramen cecum and what passes through it?

Answer 25

Between frontal and ethmoid bones, and emissary veins pass through it to nasal cavity, connecting it with superior sagittal sinus

Question 26

What passes through cribriform foramina of ethmoid bone?

Answer 26

Olfactory nerves from nasal mucosa to olfactory bulb

Question 27

How many total foramina are there in anterior cranial fossa?

Answer 27

2. Foramen cecum, and cribriform foramina

Question 28

What is the boundary between the anterior and middle cranial fossa?

Answer 28

Anterior edge of chiasmatic sulcus, between the optic canals across the body of sphenoid

Question 29

What attaches on anterior clinoid process?

Answer 29

Tentorium cerebelli

Question 30

What bones does the middle cranial fossa consist of?

Answer 30

Sphenoid, and temporal

Question 31

What is the posterior boundary of middle cranial fossa?

Answer 31

Anterior surface of the petrous part of the temporal bone

Question 32

What are the anterior and posterior walls of sella turcica called?

Answer 32

anterior: tuberculum sellae posterior: dorsum sellae

Question 33

Where's the superior orbital fissure located and what passes through it?

Answer 33

between the lesser and greater wings of sphenoid, CN 3,4, 5(i), 6, and superior ophthalmic veins pass through it

Question 34

What passes through foramen rotundum and to where?

Answer 34

Maxillary nerve of trigeminal, it goes to pterygopalatine fossa

Question 35

What passes through optic canal?

Answer 35

optic nerve and ophthalmic artery

Question 36

What passes through foramen ovale?

Answer 36

Mandibular nerve, lesser petrosal nerve and accessory middle meningeal artery, it goes to infratemporal fossa

Question 37

What passes through foramen spinosum and to where?

Answer 37

Middle meningeal artery and veins, and to infratemporal fossa

Question 38

What passes through carotid canal and from where?

Answer 38

internal carotid artery from neck

Question 39

what passes through foramen lacerum?

Answer 39

nothing, it's filled with cartilaginous plug

Question 40

Greater petrosal nerve is a branch of which cranial nerve?

Answer 40

Facial nerve

Question 41

Lesser petrosal nerve is a branch of which nerve?

Answer 41

Glossopharyngeal nerve

Question 42

What bones form the posterior cranial fossa?

Answer 42

occipital and temporal

Question 43

What passes through foramen magnum?

Answer 43

brainstem, spinal cord, vertebral arteries, nerve plexuses, anterior and posterior spinal artery, meninges, spinal roots of accessory nerve.

Question 44

What passes through internal acoustic meatus and where?

Answer 44

CN 7, CN 8, and labyrinthine artery and vein, through styloid foramen, to ear and neck

Question 45

What passes through jugular foramen?

Answer 45

CN 9, 10, 11, internal jugular vein, into which sigmoid and petrosal sinus drain

Question 46

What passes through hypoglossal canal?

Answer 46

hypoglossal nerve and miningeal branch of ascending pharyngeal artery

Question 47

What passes through the condylar canal?

Answer 47

emissary vein

Question 48

How many foramina in posterior cranial fossa? and name them

Answer 48

``` 5 internal acoustic meatus hypoglossal canal jugular foramen foramen magnum condylar foramen ```