Cranial Nerves Flashcards

1
Q

Name the 5th cranial nerve.

A

Trigeminal nerve

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2
Q

Name the 1st cranial nerve.

A

Olfactory nerve

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3
Q

Name the 8th cranial nerve.

A

Vestibulocochlear nerve

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4
Q

Name the 10th cranial nerve.

A

Vagus nerve

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5
Q

Name the 2nd cranial nerve.

A

Optic nerve

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6
Q

Name the 7th cranial nerve.

A

Facial nerve

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7
Q

Name the 9th cranial nerve.

A

Glossopharyngeal nerve

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8
Q

Name the 3rd cranial nerve.

A

Oculomotor nerve

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9
Q

Name the 4th cranial nerve.

A

Trochlear nerve

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10
Q

Name the 6th cranial nerve.

A

Abducents nerve

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11
Q

Name the 12th cranial nerve.

A

Hypoglossal nerve

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12
Q

Name the 11th cranial nerve.

A

Spinal accessory nerve.

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13
Q

What 3 motor nerves are grouped together to provide eye muscle movement?

A

3,4&6.

Oculomotor, Trochlear and abducent.

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14
Q

What nerve is the branchial motor a component of?

A

The vagus nerve. CN: 10

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15
Q

What are special sensations?

A

Taste, smell and vision.

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16
Q

What kind of nerve is the olfactory nerve? (sensory, motor, special)

A

Special sensory for smell.

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17
Q

What are the only nerves that can regenerate?

A

Olfactory nerves.

18
Q

What is anosmia?

A

Can’t smell

19
Q

What kind of nerve is the optic nerve?

A

Special sensory for vision.

20
Q

What is an optic chiasm?

A

Where the optic nerves partially cross over.

21
Q

What feature of the optic nerve is important in detecting brain tumours?

A

Optic nerve is a direct extension from the brain, a bulging optic nerve could indicate a brain tumour.

22
Q

What is multiple sclerosis? What causes this?

A

Degeneration of the nerve fibres in the eye. Loss of the myelin surrounding the nerve axons.

23
Q

The oculomotor nerve receives some parasympathetic nerve innervation that controls..?

A

Sphincter papillae: Constricts the eye.

Cilliary muscle: Near and far adjustment of sight.

24
Q

If a patient is having trouble walking down the stairs they could be having trouble with cranial nerve..?

A

4: Trochlear nerve.

Usually affected alongside CN: 3 Oculomotor.

25
Q

Name the 3 branches of the trigeminal nerve.

A

Ophthalmic, maxillary and mandibular.

26
Q

What group of muscles does the trigeminal nerve supply?

A

The muscles of mastication.

27
Q

Where does the abducent nerve arise from?

A

The pons.

28
Q

Name the pneumonic for eye muscle movement. Explain.

A

LR6 S04
Lateral rectus is supplied by CN:6 and the superior oblique is supplied by CN: 4.
All the other muscles are suppled by CN:3.

29
Q

What cranial nerve supplies the the smallest muscle in the body? Whats the muscle called?

A

CN:7 the facial nerve.

Stapedius muscle.

30
Q

What is the clinical test for the facial nerve?

A

Raise eyebrows, scrunch eyes and puff the cheeks.

31
Q

What does the facial nerve supply the creates special sensory sensation?

A

The anterior 2/3 of the tongue.

32
Q

What does the facial nerve supply parasympathetic innervation to?

A

The submandibular, sublingual, lacrimal and nasal/palatal glands.

33
Q

Where does the facial nerve run through yet not supply?

A

The parotid gland.

34
Q

What nerve supplies parasympathetic innervation to the parotid glands?

A

CN:9 The glossopharyngeal nerve.

35
Q

What nerve supples special sensation to the posterior 1/3 of the tongue?

A

CN:9 The glossopharyngeal nerve.

36
Q

What does the vagus nerve supply parasympathetic innervation to?

A

The heart, GI tract, the lungs.

37
Q

What does the vagus nerve supply special sensory sensation to?

A

The pallet and epiglottis.

38
Q

What is the clinical test for the vagus nerve?

A

Say ‘aaaah’

39
Q

If there are problems with the vagus nerve what will the patient present with?

A

Inability to swallow/speak. Lack of gag reflex.

40
Q

What does the hypoglossal nerve supply?

A

Somatic motor innervation to the muscles of the tongue.

41
Q

What muscle is an exception to the hypoglossal nerve supply?

A

The palatoglossus. (Glossopharyngeal nerve)

42
Q

What is the difference between the glossopharyngeal and the hypoglossal nerve?

A

The glossopharyngeal is a special sensory nerve to the tongue (Posterior 1/3).
The hypoglossal is a somatic motor nerve to the tongue.