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21. Cranial Nerves 7-12 Flashcards

1
Q

What are the 3 types of motor fibres?

A

Somatic
Branchiomotor
Parasympathetic

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2
Q

What are the 3 types of sensory fibres?

A

Somatic
Visceral and taste
Special

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3
Q

Which cranial nerves have somatic motor fibres?

A

3, 4, 6, 12

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4
Q

Which cranial nerves have branchiomotor fibres?

A

5c, 7, 9, 10, 11

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5
Q

Which cranial nerves have parasympathetic motor fibres?

A

3, 7, 9, 10

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6
Q

Which cranial nerves have somatic sensory fibres?

A

5, 7, 9, 10

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7
Q

Which cranial nerves have visceral sensory fibres?

A

7, 9, 10

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8
Q

Which cranial nerves have special sensory fibres?

A

1, 2, 8

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9
Q

What are the motor functions of CN VII?

A

Branchiomotor to second arch (facial expresion

Parasympathetic secretomotor

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10
Q

What ganglion contains the sensory nerve bodies of VII?

A

Geniculate ganglion

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11
Q

What are the sensory functions of VII?

A

Somatosensory to the ear

Visceral sensory taste to hard palate and anterior 2/3 of tongue

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12
Q

How can you test CN VII?

A

Test each facial muscle

Corneal reflex

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13
Q

Where does CN VIII emerge?

A

Cerebellopontine angle

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14
Q

Where are the vestibular and cochlear nuclei found?

A

Floor of the 4th ventricle

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15
Q

Where do signals from the cochlear nuclei go?

A

Inferior coliculi

Medial geniculate body

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16
Q

Where does CN IX emerge?

A

Behind the olives of the medulla

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17
Q

What are the motor functions of CN IX?

A

Branchiomotor to 3rd arch: stylopharyngeus

Parasympathetic to otic ganglion

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18
Q

What ganglion is associated with branchiomotor CN IX?

A

Nucleus ambiguus

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19
Q

What are the sensory functions of CN IX?

A

Somatic (superior ganglion) to the tympanic membrane and posterior 1/3 of tongue
Visceral (inferior ganglion) to oropharynx and taste to posterior 1/3 of tongue, carotid body

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20
Q

What will happen to the uvula if the nucleus ambiguus is damaged?

A

Uvula deviates away from the side of the lesion

21
Q

What are the motor functions of CN X?

A

Branchiomotor to 4th and 6th arches: swallowing and phonation
Parasympathetic to thoracoabdominal region

22
Q

What are the sensory functions of CN X?

A

Somatic to internal laryngeal nerve

Visceral taste to valleculae and to viscera in heart and abdomnen

23
Q

What are the two parts of CN XI?

A

Cranial

Spinal

24
Q

What is the course of the cranial accessory nerve?

A

Runs with X in the nucleus ambiguus

25
Q

How is the spinal accessory nerve tested?

A

Test sternocleidomastoid and trapezius

26
Q

What is the motor function of CN XII?

A

Somatic to the tongue

27
Q

Where does CN XII emerge from?

A

between pyramids and olives of the medulla

28
Q

What will happen to the tongue if there is a lesion of XII?

A

Tongue will deviate towards the side of the lesion

29
Q

What does a lesion of III cause?

A

Occular palsy

30
Q

What does a lesion of V cause?

A

Weakness of jaw and numbness of face

31
Q

What does a lesion of VII cause?

A

Facial palsy and loss of taste

32
Q

What does a lesion of VIII cause?

A

Deafness and vertigo

33
Q

What does a lesion of IX, X, cranial XI and XII cause?

A

Bulbar palsy

34
Q

What does a lesion of spinal XI cause?

A

Weakness of head, neck and shoulder muscles

35
Q

Where do sympathetic nerves come from?

36
Q

What nerves are damaged in Pancoast’s tumour?

A

T1 to small muscles of the hand

Sympathetic chain to head

37
Q

What nucleus is associated with III?

A

Edinger Westphal nucleus

in periaqueductal grey matter of the midbrain

38
Q

What nucleus is associated with VII?

A

Superior salivatory nucleus

in the pons

39
Q

What nucleus is associated with IX?

A

Inferior salviatory nucleus

in the medulla

40
Q

What is the innervation of the ciliary ganglion?

A

Va, III and sympathetics from internal carotid

41
Q

What are the parasympathetic actions of the ciliary ganglion?

A

Acts on sphincter pupillae
Pupillary light reflex
Accommodation

42
Q

What are the sympathetic actions of the ciliary ganglion?

A

Dilator pupillae
Levator palpebrae superioris
Vasoconstriction

43
Q

What is the innervation to the pterygopalatine ganglion?

A

Vb, VII, internal carotid

44
Q

What are the parasympathetic actions of the pterygopalatine ganglion?

A

Act on the lacrimal gland, nasal cavity, hard palate

45
Q

What are the sympathetic actions of the pterygopalatine ganglion?

A

Vasoconstriction

46
Q

What is the innervation to the submandibular ganglion?

A

Vc, VII, external carotid

47
Q

What are the parasympathetic actions of the submandibular ganglion?

A

Secretomotor to the submandibular and sublingual glands

Taste to the anterior 2/3 of tongue

48
Q

What are the sympathetic actions of the submandibular ganglion?

A

Vasoconstriction

49
Q

What is the innervation to the otic ganglion?

A

Vc, IX, external carotid

NSB (22 decks)

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