Cranial fossa

Question 1

What goes through the hiatus for greater petrosal nerve and where does it end up?

Answer 1

The greater petrosal nerve.

Ends up in the genu of facial canal.

Question 2

What goes through the foramen rotondum and where does it end up?

Answer 2

The trigeminal cranial nerve branch V2 (maxillary).

Ends up in the Pterygopalatine fossa.

Question 3

What goes through the foramen ovale and where does it end up?

Answer 3

1. Trigemminal mandibular nerve (V3)
2. Venous plexus
3. Accessory meningeal artery
   It ends up in the infratemporal fossa.

Question 4

What goes through the hiatus of lesser petrosal nerve and where does it end up?

Answer 4

1. The lesser petrosal nerve.
2. Superior tympanic artery and vein

It ends up in the tympanic cavity.

Question 5

What goes through the optic canal and where does it end up?

Answer 5

1. The ophthalmic artery
2. The optic nerve

Ends up in the orbital cavity

Question 6

What goes through the superior orbital fissure and where does it end up?

Answer 6

1. CN 3 (Oculomotor)
2. CN 4 (Trochlear)
3. CN 5 V1 (Trigeminal optalamic)
4. CN 6 (Abducens)
5. Superior branch of inferior optalmic veins
6. Superior optalmic veins

Ends up in the orbital cavity

Question 7

What goes through the internal foramina of carotid canal and where does it end up?

Answer 7

1. Internal carotid artery
2. Carotid plexus

It ends up in the parapharyngeal space

Question 8

What goes through the Foramen lacerum?

Answer 8

Nothing

Question 9

What goes through the foramen magnum and where does it end up?

Answer 9

1. Spinal cord and its meninges.
2. Spinal accessory nerve
3. Vertebral artery
4. Anterior and posterior spinal artery
5. Internal vertebral plexuses.

Ends up in the vertebral canal

Question 10

What goes through the jugular foramen?

Answer 10

The anterior part:

1. Inferior petrosal sinus
2. CN 9.

The posterior part:

1. Sigmoid sinus,
2. CN 10 (Vagus nerve)
3. CN 11 (Accessory cranial part)

They both end up in the parapharyngeal space.

Question 11

What passes through the internal acoustic meatus?

Answer 11

1. The facial nerve (CN 7)

2. The vestibulocochlear nerve (CN 8)

Question 12

What passes through the hypoglossal canal and where does it end up?

Answer 12

The hypoglossal nerve (CN 12)

Ends up in the external base of skull.

Question 13

What passes through the mastoid foramina and where does it end up?

Answer 13

The mastoid emissary vein.

Ends up in the external base of the skull

Question 14

What passes through the condylar canal and where does it end up?

Answer 14

Condylar emissary vein.

Ends up in the external base of skull

Question 15

What passes through the foramina in the cribriform plate and where does it end up?

Answer 15

Olfactory filaments.

Ends up in the nasal cavity.

Question 16

What passes through the foramen cecum and where does it end up?

Answer 16

1. Extension of dura matter.
2. Emissary vein for nasal mucosa to superior sagital sinus.

It ends up in the nasal cavity.

Question 17

What passes through the anterior ethmoidal foramen and where does it end up?

Answer 17

1. The anterior ethmoidal N.A.V

It ends up in the orbital cavity.

Question 18

What foraminas are found in the middle cranial fossa?

Answer 18

1. Foramen rotunum
2. Hiatus for greater petrosal nerve.
3. Foramen ovale
4. Foramen spinosum
5. Hiatus of lesser petrosal nerve
6. Superior orbital fissure
7. Optic canal
8. Interanal foramina of carotid canal.
9. Foramen lacrerum

Question 19

What foraminas are found at the posterior cranial fossa?

Answer 19

1. Foramen magnum
2. Jagular foramen
3. Internal acoustic meatus
4. Hypoglossal canal
5. Mastoid foramina
6. Condylar canal

Question 20

What is a sign of a fracture to the middle cranial fossa?

Answer 20

Cerebrospinal fluid out of the ear.

Question 21

What is a sign of fracture to the anterior cranial fossa?

Answer 21

Cerebrospinal Fluid out of the nasal cavity.

Usually fatal.