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3rd Year > H&N week 5- CN & floor & base of cranial cavity > Flashcards

H&N week 5- CN & floor & base of cranial cavity Flashcards

1
Q

Label this diagram of the cranial nerves at the floor of the cranial cavity.

A
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2
Q

What is an anaeursym?

A

Pathological swelling of the artery.

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3
Q

What is the olfactory bulb?

A

Where a lot of little olfactory nerves pass into & follow the olfactory tract to the forebrain.

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4
Q

What is the anterior clinoid process?

A

A bony projection where the optic nerve disappears anterior to

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5
Q

What are the boundaries of the middle cranial fossa?

A

From the lesser wing of the sphenoid bone to the superior border of the petrous temporal bone.

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6
Q

Name this foramen and what passes through it.

A

Internal acoustic meatus.

The facial and vestibucochlear nerve passes through here.

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7
Q

What arteries join together to form the Basilar artery?

A

The R and L vertebral arteries.

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8
Q

Compare the two roots of the spinal accessory nerve

A

Cranial root - helps supply the muscles of pharynx and larynx (along with vagus)

Spinal root- comes from C1-C5 of the spinal chord and supplies the sternocleiodmastoid and trapezius.

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9
Q

Where does the abducens nerve exit the skull?

A

At the superior orbital fissure.

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10
Q

What is the pituitary stalk?

A

A part of the pituitary gland that is covered by diahragmus cells (a thin part of the dura mater)

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11
Q

What is the Diploe?

A

Bone marrow that seperates the inner and outer tables of the skull.

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12
Q

What is the dental relevance of trigeminal neuralgia?

A

Dental treatments can trigger it.

It presents as a sharp pain in one of the trigeminal regions.

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13
Q

Label this diagram of the cross section of the cranial cavity .

A
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14
Q

What is A in the diagram

A

Falx cerebri.

This is a large fold of dura mater.

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15
Q

What is B in the diagram?

A

Tentorium cerebelli- an almost horizontal fold of dura mater at the back of the skull.

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16
Q

What is the function of the inferior sagittal sinus?

A

This joins with the great cerebral vein to form the straight sinus.

17
Q

What is the great cerebral vein?

A

A large vein that drains the midline parts of the forebrain.

Sometimes known as the Vein of Galen.

18
Q

Where does the blood of the vein of galen flow back to?

A

The straight sinus.

19
Q

What is the crista gali?

A

A bony projection that the falx cerebri attaches to.

20
Q

What are the superior cerebral veins?

What is characteristic of them>

A

Thin walled veins that drain the upper parts of the cerebral hemisphere.

There are no valves in these veins.

21
Q

Label this image of the floor of the cranial fossa.

A
22
Q

What is the red arrow pointing to?

A

Foramen lacerum-

This is a lacey projection and a plug of cartilage sits in it.

23
Q

What is the green on this skull?

A

Sella Turcica (the turkish saddle)

24
Q

What is this foramen and what passes through?

A

Superior orbital fissure

  • CN3
  • CN4
  • CN6
  • CN5-opthalamic divison
  • Opthalamic veins.
25
Q

Name this hole and what passes through it ?

A

Foramen rotundum

Maxillary divsion of trigeminal nerve passes through.

26
Q

Name this hole and what passes through it ?

A

Spinoidal emissary foramen.

The emissary vein passes through.

27
Q

Name this hole and what passes through it ?

A

Foramen spinosum.

Middle meningeal artery passes through.

28
Q

Name this hole and what passes through it ?

A

Hypoglossal canal

CN12 passes through.

29
Q

Name this hole and what passes through it ?

A

foramen mangun

The Vertebral arteries pass through.

30
Q

Name this hole and what passes through it ?

A

Jugular foramen.

CN9

CN10

CN11

Internal jugular vein.

31
Q

Name this hole and what passes through it ?

A

Foramen ovale-

The mandibular division of trigeminal nerve

32
Q

Name this hole and what passes through it ?

A

Carotid canal.

The internal carotid artery passes through .

33
Q

Name this hole and what passes through it ?

A

Optic canal-

Optic nerve.

34
Q

Name this hole and what passes through it ?

A

Cribiform plate- the olfactory nerves pass through here.

35
Q

Label this Norma basalis view of the skull

A
36
Q

What is this hole and what does it transmit

A

Stylomastoid foramen

This transmits the facial nerve.

3rd Year (63 decks)

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