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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
How is the spinal accessory nerve tested?
Test sternocleidomastoid and trapezius
26
What is the motor function of CN XII?
Somatic to the tongue
27
Where does CN XII emerge from?
between pyramids and olives of the medulla
28
What will happen to the tongue if there is a lesion of XII?
Tongue will deviate towards the side of the lesion
29
What does a lesion of III cause?
Occular palsy
30
What does a lesion of V cause?
Weakness of jaw and numbness of face
31
What does a lesion of VII cause?
Facial palsy and loss of taste
32
What does a lesion of VIII cause?
Deafness and vertigo
33
What does a lesion of IX, X, cranial XI and XII cause?
Bulbar palsy
34
What does a lesion of spinal XI cause?
Weakness of head, neck and shoulder muscles
35
Where do sympathetic nerves come from?
T1 to L2
36
What nerves are damaged in Pancoast's tumour?
T1 to small muscles of the hand | Sympathetic chain to head
37
What nucleus is associated with III?
Edinger Westphal nucleus | in periaqueductal grey matter of the midbrain
38
What nucleus is associated with VII?
Superior salivatory nucleus | in the pons
39
What nucleus is associated with IX?
Inferior salviatory nucleus | in the medulla
40
What is the innervation of the ciliary ganglion?
Va, III and sympathetics from internal carotid
41
What are the parasympathetic actions of the ciliary ganglion?
Acts on sphincter pupillae Pupillary light reflex Accommodation
42
What are the sympathetic actions of the ciliary ganglion?
Dilator pupillae Levator palpebrae superioris Vasoconstriction
43
What is the innervation to the pterygopalatine ganglion?
Vb, VII, internal carotid
44
What are the parasympathetic actions of the pterygopalatine ganglion?
Act on the lacrimal gland, nasal cavity, hard palate
45
What are the sympathetic actions of the pterygopalatine ganglion?
Vasoconstriction
46
What is the innervation to the submandibular ganglion?
Vc, VII, external carotid
47
What are the parasympathetic actions of the submandibular ganglion?
Secretomotor to the submandibular and sublingual glands | Taste to the anterior 2/3 of tongue
48
What are the sympathetic actions of the submandibular ganglion?
Vasoconstriction
49
What is the innervation to the otic ganglion?
Vc, IX, external carotid

NSB (22 decks)

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