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Neurology phase 1 > Cranial nerves > Flashcards

Cranial nerves Flashcards

1
Q

What is the mnemonic for cranial nerves…

A

Oh oh oh to touch and feel very good velvet ah heaven

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2
Q

What is the mnemonic for motor/ sensory cranial nerves…

A

Some Say Marry Money, But My Brother Says Big Brains Matter Most

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3
Q

Describe olfactory 1

A

Sensory
cerebrum origin
cribriform plate insertion
smell function
tested by smelling strong compounds

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4
Q

Describe optic 2

A

Sensory
Diencephalon origin
Optic canal insertion
sight function
snellen chart, pupillary light reflex, colour vision

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5
Q

Describe oculomotor 3

A

Motor
brainstem origin
superior orbital fissure insertion
eye movements
finger test, pupillary light reflex

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6
Q

Describe trochlear 4

A

Motor
Midbrain origin
superior orbital fissure insertion
eye movements
finger test

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7
Q

Describe trigeminal 5

A

Both
Pons origin
insertion: superior orbital fissure, foramen rotundum, foramen ovale.
face sensation
tested using cotton wool on skin or jaw clench

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8
Q

Describe abducens 6

A

Motor
pons origin
superior orbital fissure
eye movement
finger test

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9
Q

Describe facial 7

A

Both
pons origin
internal auditory meatus, then stylomastoid foramen insertion
tested facial movements

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10
Q

Describe vestibulocochlear 8

A

Sensory
pons origin
internal auditory meatus insertion
balance and hearing
block 1 ear and test the other

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11
Q

Describe glossopharyngeal 9

A

Both
medulla origin
jugular foramen insertion
taste and swallowing
gag reflex

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12
Q

Describe vagus 10

A

Both
medulla origin
jugular foramen
parasympathetic - motor function to various muscles
gag reflex, saying aah (larynx muscles), swallowing and coughing

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13
Q

Describe accessory 11

A

Motor
spinal cord origin C1-5
foramen magnum in, jugular foramen out
head and neck movements
shrug shoulders

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14
Q

Describe hypoglossal 12

A

Motor
medulla origin
hypoglossal canal insertion
tongue movements
protrude tongue
deviation of tongue on either side = abnormality.

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15
Q

What muscles does the vagus nerve supply?

A

heart, lungs, oesophagus, pharynx and larynx

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16
Q

What does Cn1 innervate?

A

olfactory epithelium

17
Q

What does Cn2 innervate?

A

retina

18
Q

What does Cn3 innervate?

A
  • Innervates: medial, superior and inferior rectus muscles and inferior oblique and levator palpebrae superioris.
  • Motor function: movement of eyeball.
  • Parasympathetic function: constriction and accommodation.
19
Q

What does Cn4 innervate?

A

superior oblique

20
Q

What does Cn5 innervate?

A

Sensory innervation: face, scalp, cornea, nasal and oral cavities, anterior 2/3 of tongue, dura mater.
- Motor innervation: muscles of mastication and tensor tympani.
- Sensory function: general sensation.
- Motor functions: open and close the mouth. Tenses tympanic membrane.

21
Q

What does Cn6 innervate?

A

lateral rectus

22
Q

What does Cn7 innervate?

A
  • Special sensory innervation: anterior 2/3 of tongue - taste.
  • Motor innervation: muscles of facial expression and stapedius.
  • Parasympathetic innervation: submandibular and sublingual and lacrimal glands.
23
Q

What does Cn8 innervate?

A

cochlea and vestibular apparatus.

24
Q

What does Cn9 innervate?

A

Sensory innervation: posterior 1/3 of tongue, middle ear, pharynx, carotid bodies.
- Motor innervation: stylopharyngeus.
- Parasympathetic innervation: parotid gland.

25
Q

What does Cn10 innervate?

A
  • Sensory innervation: pharynx, larynx, oesophagus, external ear, aortic bodies, thoracic and abdominal viscera.
  • Motor innervation: soft palate, larynx, pharynx.
  • Parasympathetic innervation: CV, respiratory and GI systems.
26
Q

What are the functions of Cn10?

A
  • Sensory functions: general sensation.
  • Motor functions: speech and swallowing.
  • Parasympathetic functions: control over CV, respiratory and GI systems.
27
Q

What are the functions of Cn9?

A
  • Sensory functions: general sensation, taste, chemo/baroreception.
  • Motor functions: Swallowing (larynx and pharynx are elevated).
  • Parasympathetic function: salivation.
28
Q

What are the functions of Cn7?

A
  • Sensory function: taste.
  • Motor function: facial movement and tension of ossicles.
  • Parasympathetic function: salivation and lacrimation.
29
Q

What does Cn11 innervate?

A

trapezius and sternocleidomastoid.

30
Q

What does Cn12 innervate?

A
  • Innervation: intrinsic and extrinsic muscles of the tongue.
  • Function: movement of the tongue.

Neurology phase 1 (3 decks)

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