Floor of the skull

Question 1

Which bone forms the posterior boundary of the anterior cranial fossa?

Answer 1

Lesser wing of sphenoid

Question 2

Which bone forms the anterior boundary of the middle cranial fossa?

Answer 2

Greater wing of sphenoid

Question 3

Which bones form the floor of the middle cranial fossa?

Answer 3

Sphenoid
Temporal bone (squamous and petrous parts)

Question 4

Which four bones come together at the H-shaped suture called the pterion?

Answer 4

Sphenoid
Temporal
Frontal
Parietal

Question 5

Which bone forms the posterior border of the posterior cranial fossa?

Answer 5

Occipital bone

Question 6

What structures pass through the small foramina of the skull?

Answer 6

Nerves

Blood vessels

Question 7

What goes through the foramina of the cribriform plate?

Answer 7

Olfactory Nerve

Question 8

What goes through the optic foramen?

Answer 8

Optic Nerve

Ophthalmic Artery

Question 9

What goes through the superior orbital fissure?

Answer 9

Oculomotor Nerve
Trochlear Nerve
Ophthalmic division of the trigeminal nerve
Abducens Nerve

Question 10

What goes through the foramen rotundum?

Answer 10

Maxillary branch of the trigeminal nerve

Question 11

What goes through the foramen oval?

Answer 11

Mandibular branch of the Trigeminal nerve

Question 12

What goes through the foramen spinosum?

Answer 12

Middle Meningeal artery and vein

Question 13

What goes through the internal acoustic foramen?

Answer 13

Facial Nerve

Vestibulocochlear Nerve

Question 14

What goes through the jugular foramen?

Answer 14

Glossopharyngeal nerve
Vagus Nerve
Accessory nerve
Internal Jugular vein

Question 15

What goes through the foramen magnum?

Answer 15

Spinal Cord

Vertebral Arteries

Question 16

Where are the intra cranial venous blood sinuses found?

Answer 16

Between the inner and outer layers of the dura

Question 17

The grooves that run laterally on both sides of the internal occipital protuberance are for what?

Answer 17

The transverse sinus

Question 18

What are the S-shaped grooves are for what?

Answer 18

The sigmoid sinus

Question 19

Into which foramen does the groove for the sigmoid sinus lead?

Answer 19

Jugular foramen

Question 20

Which major vein emerges from the jugular foramen?

Answer 20

Internal Jugular vein

Question 21

What is the sella turcica?

Answer 21

A deep depression in the midline in the middle cranial fossa which house the pituitary gland

Question 22

In the body of which cranial bone is the sella turcica found?

Answer 22

Sphenoid

Question 23

What do the anterior and posterior crinoid processes on each side of the sella turcica give attachment to?

Answer 23

Tentorium cerebelli

Question 24

On either side of the sella turcica is a groove for what?

Answer 24

The cavernous venous (intracranial sinus)

Question 25

Which foramen lies immediately anterior to the groove for the cavernous sinus?

Answer 25

Superior Orbital Fissure

Question 26

The pterygoid plate and the pterygoid hamulus are part of which bone?

Answer 26

Sphenoid

Question 27

What is the muscle that attaches to the medial pterygoid plate?

Answer 27

Superior constrictor muscle of pharynx

Question 28

What muscles are attached to the lateral pterygoid plate?

Answer 28

Pterygoid muscles (medial and lateral)