6 - Head & Neck - Cranial Nerves Flashcards

1
Q

Which 3 cranial nerves are purely special sensory?

A
CN I (Olfactory)
CN II (Optic)
CN VIII (Vestibulocochlear)
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2
Q

Which cranial nerves carry efferent autonomic fibres?

A

CN III
CN VII
CN IX
CN X

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3
Q

Which cranial nerves are purely motor?

A
CN III
CN IV
CN VI
CN XI
CN XII
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4
Q

Which cranial nerve supplies motor fibres to the ciliary muscles and the sphincter of the pupil?

A

CN III Oculomotor

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5
Q

Which cranial nerve supplies motor fibres to the superior oblique muscle of the eye?

A

CN IV Trochlear

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6
Q

Which cranial nerve supplies motor fibres to the lateral rectus muscle of the eye?

A

CN VI Abducens

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7
Q

Which cranial nerve supplies motor fibres to the muscles of mastication?

A

CN V Trigeminal

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8
Q

Which cranial nerve supplies motor fibres to the muscles of facial expression?

A

CN VII Facial

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9
Q

Which cranial nerve supplies sensory fibres for hearing?

A

CN VIII Vestibulocochlear

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10
Q

Which cranial nerve supplies general sensation to the pharynx, eustachian tube and middle ear cavity?

A

CN IX Glossopharyngeal

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11
Q

Which cranial nerve supplies motor fibres to the larynx, trachea, bronchial tree, heart and most of GI tract?

A

CN X Vagus

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12
Q

Which cranial nerve supplies motor fibres to Sternocleidomastoid?

A

CN XI Accessory

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13
Q

Which cranial nerve supplies motor to all intrinsic and extrinsic muscles of the tongue, except palatoglossus?

A

CN XII Hypoglossus

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14
Q

What parts of the head/neck have sensory innervation from the Trigeminal nerve (CN V)?

A
  • Face
  • Sinuses
  • Teeth
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15
Q

A patient with a brainstem lesion in the pons may present with dysfunction of which cranial nerves?

A

CN V
CN VI
CN VII
CN VIII

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16
Q

Which cranial nerves exit the skull via the Internal Acoustic Meatus?

A

CN VII

CN VIII

17
Q

Which cranial nerves exit the skull via the Superior Orbital Fissure?

A

CN III
CN IV
CN V1
CN VI

18
Q

Which cranial nerves exit the skull via the Jugular Foramen?

A

CN IX
CN X
CN XI

19
Q

Through which hole does CN XII (hypoglossus) exit the skull?

A

Hypoglossal canal

20
Q

Through which hole does CN V2 exit the skull?

A

Foramen rotundum

21
Q

Through which hole does CN V3 exit the skull?

A

Foramen ovale

22
Q

Which cranial nerves pass through the cavernous sinus?

A
CN III
CN IV
CN V1
CN V2
CN VI
23
Q

How may a cavernous sinus thrombosis present?

A
  • Headache +/- Fever
  • Periorbital oedema = exopthalmos (may affect sight)
  • Ophthalmoplegia
  • Diplopia
  • Ptosis
  • Mydriasis
  • Pain/numbness around forehead/cheek
24
Q

What is mydriasis? Lesion of which cranial nerve will cause this?

A

Dilation of the pupil of the eye

CN III Oculomotor

25
Q

Why are CN I, II and XI considered unusual compared to the other cranial nerves?

A

CN I + II are direct continuations of the forebrain

CN XI contains fibres from the cervical spine

26
Q

Which cranial nerves originate from the midbrain?

A

CN III

CN IV

27
Q

Which cranial nerves originate from the pons?

A

CN V
CN VI
CN VII
CN VIII

28
Q

Which cranial nerves originate from the medulla?

A

CN IX
CN X
CN XI
CN XII

29
Q

Which cranial nerves pass into the orbit?

A
CN II
CN III
CN IV
CN V1
CN V2
CN VI
30
Q

What gland lies in the center of the cavernous sinus?

A

Pituitary gland