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Anatomy 1080 > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

What is CN 1

A

Olefactory nerve- the nerve for smell

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2
Q

What us CN II

A

Optic nerve- nerve for vision-> transmits visual stimuli

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3
Q

What is CN VIII

A

Vestibulocochlear nerve-> actually 2 nerves

Vestibular-> balance + equilibrium
Cochlear> the sense of hearing

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4
Q

What is CN III?

A

Oculomotor nerve

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5
Q

What is CN IV

A

Trochlear nerve

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6
Q

What is CN VI

A

Abducens nerve

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7
Q

What is CN XI

A

Accessory nerve

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8
Q

What is CN XII

A

Hypoglossal nerve

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9
Q

What is CN V

A

Trigeminal nerve

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10
Q

What is CN VII

A

Facial nerve

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11
Q

What is CN IX

A

Glossopharyngeal nerve

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12
Q

What is CN X

A

Vagus nerve

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13
Q

What is the Roman numeral for Olefactory nerve

A

CN I

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14
Q

What is the Roman numeral for Optic nerve

A

CN II

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15
Q

What is the Roman numeral for vestibulocochlear nerve

A

CN VIII

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16
Q

What is the Roman numeral for the oculomotor nerve

A

CN III

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17
Q

What is the Roman numeral for Trochlear nerve

A

CN IV

18
Q

What is the Roman numeral for the Abducens nerve

A

CN VI

19
Q

What is the Roman numeral for the accessory nerve

A

CN XI

20
Q

What is the Roman numeral for Trigeminal nerve

A

CN V

21
Q

What is the Roman numeral for Hypoglossal nerve

A

CN XII

22
Q

What is the Roman numeral for Facial nerve

A

CN VII

23
Q

What is the Roman numeral for the glossopharyngeal nerve

A

CN IX

24
Q

What is the Roman numeral for the vagus nerve

A

CN X

25
Q

What is the function of CN 1

A

Olefactory nerve-> cribiform plate of ethmoid bone-> nerve endings contain chemoreceptors which depolarize in response to chemicals in air breathed, the impulses are sent to the primary olfactory cortex in temporal lobe

26
Q

What is the function of CN II

A

Optic nerve-> this nerve is for vision, pathway; optic nerve-> optic chiasma (decussate)-> primary visual cortex in occipital lobe

27
Q

What is the function of the vestibulocochlear nerve?

A

CN VIII-> two separate nerves vestibular & cochlear

Cochlear -> depolarize in response to sound waves
-> hearing

Vestibular-> depolarizes in response to body position
-> balance and position

28
Q

What is the function of the oculomotor nerve?

A

CN III-> controls extrinsic and smooth muscles of the eye
Has both somatic and visceral motor neurons

Somatic:
Moves eyeball (controls 4 of 6 of the muscles)
Opens eye

Visceral/Parasympathetic:
Constriction of pupil
Changing of Lens shape

29
Q

What is the function of CN IV

A

Trochlear nerve: moves the eyes medially & inferiorly by innervating the superior oblique muscle

30
Q

What is the function of the abducens nerve?

A

CN VI-> Turns eye laterally-> innervates the lateral rectus

31
Q

What is the function of CN V

A

Trigeminal nerve-> spilts into 3 branches at the Trigeminal ganglion

  • > opthalimic-> sensory function for forehead/nose (no motor function)
  • > maxillary-> sensory function over middle of face
  • > mandibular-> sensory function of chin and lateral parts of face-> motor axons innervate muscles of mastication (chewing) the temporalis and masseter
32
Q

What is the function of CN VII, what are the 5 branches?

A

Facial nerve-> sensory and motor (mixed)

Motor: muscles of facial expression controlled by 5 branches
-> temporal, zygomatic, buccal, mandibular, and cervical nerves

Sensory: taste from anterior 2/3 of tounge (chemoreceptors)

Parasympathetic: stimulation produces fluid: tears, saliva (submandibular gland, sublingual glands, lacrimal glands)

33
Q

What is the function of CN IX

A

Glossopharyngeal nerve-> sensory and Motor & parasympathetic

Motor: controls muscles responsible for swallowing movements

Parasympathetic: trigger salivation from the salivary gland called the parotid gland

Sensory: supplies pharynx and back 1/3 of the tounge

34
Q

What cranial nerves are responsible for our ability to taste

A

CN IX-> glossopharyngeal nerve & CN VII-> facial nerve

CN X- vagus nerve (taste sensation in pharynx)

35
Q

What is the function of the vagus nerve?

A

CN X-> main parasympathetic nerve-> innervates with throat and anterior neck as well as nearly all the thoracic & abdominal viscera

Sensory neurons & motor neurons both somatic and visceral

36
Q

What is the function of CN XI

A

The accessory nerve-> motor nerves-> 2 portions-> cranial & spinal

Cranial-> accompanies CN X/vagus and intervates certain muscles of larynx-> muscles of speech

Spinal: controls sternocleidomastoid and trapezius

37
Q

What is the function of the hypoglossal nerve

A

CN XII Intervates the muscles of the tounge (no taste sensation)

38
Q

What cranial nerves are sensory?

A

I, II, VIII (1,2,8)

Olefactory, optic, vestibulocochlear

39
Q

Which of the cranial nerves are motor nerves?

A

III, IV, VI, XI, XII (3,4,6,11,12)

Oculomotor nerve , trochlear, abducens, accessory nerve, hypoglossal nerve

40
Q

Which of the cranial nerves are mixed?

A

V, VII, IX, X

Trigeminal, facial, glossopharyngeal, vagus nerve

41
Q

What CN’s are innervated by the Parasympathetic nervous system

A

vagus-> viscera
facial-> salivary, mucus, tear glands
glossopharyngeal-> salivation (salty/acidic foods)
oculomotor-> constrict eyes/ change lens shape

42
Q

What CN(s) would be affected for each?

A) complete lost of taste sensation

B) inability to move the tounge

C) inability to move eyes in any direction

D) loss of balance and equilibrium

E) inability to close the jaw

A

A) VII & IX (facial and glossopharyngeal nerve)

B) XII -> Hypoglossal nerve

C) CN III, CN IV, CN VI

D) CN VIII-> vestibular portion of the vestibulocochlear nerve

E) CN V-> trigeminal nerve

Anatomy 1080 (20 decks)

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