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Liv vet med yr1 > Cranial nerves > Flashcards

Cranial nerves Flashcards

1
Q

Cranial nerves

A

X - Vagus
XI - Accessory
XII - Hypoglossal
I - Olfactory
II - Optic
III - Occulomotor
IV - Trochlear
V - Trigeminal
VI - Abducens
VII - Facial
VIII - Vestibulocochlear
IX - Glossopharyngeal

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2
Q

Vagus nerve - X

A
  • 4 branches
  • Travels with sympathetic nerve through chest to vagosympathetic trunk
  • Also passes recurrent laryngeal nerve
  • Mixed fibres
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3
Q

XI - Accessory

A
  • Originates in brainstem + C1-C& spinal cord
  • Motor to muscles of neck + limb
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4
Q

XII - Hypoglossal

A
  • Motor to muscles of tongue
  • Passes through hypoglossal foramen
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5
Q

I - Olfactory

A
  • Sensory - olfaction
  • Passes through cribriform plate to innervate olfactory mucosa
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6
Q

II - Optic

A
  • Sensory - vision
  • Passes through optic foramen
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7
Q

III - Occulomotor

A
  • Motor - eyeball movement + parasympathetic - miosis + accommodation of lens
  • Passes through orbital fissure
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8
Q

IV - Trochlear

A
  • Motor - eyeball movement via dorsal oblique muscle
  • Passes through orbital fissure
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9
Q

V - Trigeminal

A

has 3 divisions:
- Ophthalmic - sensory
- Maxillary - sensory
- Mandibular - sensory + motor

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10
Q

VI - Abducens

A
  • Motor - eyeball movement via lateral rectus + retractor bulbi muscle
  • Passes through orbital fissure
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11
Q

VII - Facial

A
  • Sensory: rostral 2/3 tongue
  • Motor: muscles of facial expression
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12
Q

VIII - Vestibulocochlear

A
  • Sensory
  • Passes with VII into internal acoustic meatus
  • Functions - hearing + balance
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13
Q

IX - Glossopharyngeal

A
  • Mixed fibres
  • 4 branches
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Liv vet med yr1 (18 decks)

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