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Gross Anatomy Exam 4 > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

Cranial nerves of midline

A

3, 6 and 12

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2
Q

What 2 cranial nn. are not distributed to the head?

A

Vagus and accessory nn.

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3
Q

Which cranial nn. conduct parasympathetic fibers?

A

3, 7, 9 and 10

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4
Q

Cranial nerve I

A

Olfactory

Sensory

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5
Q

Cranial nerve II

A

Optic

Sensory

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6
Q

Cranial nerve III

A

Oculomotor

Motor

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7
Q

Cranial nerve IV

A

Trochlear

Motor

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8
Q

Cranial nerve V

A

Trigeminal

Both

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9
Q

Cranial nerve VI

A

Abducens

Motor

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10
Q

Cranial nerve VII

A

Facial

Both

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11
Q

Cranial nerve VIII

A

Vestibulocochlear

Sensory

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12
Q

Cranial nerve IX

A

Glossopharyngeal

Both

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13
Q

Cranial nerve X

A

Vagus

Both

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14
Q

Cranial nerve XI

A

Accessory

Motor

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15
Q

Cranial nerve XII

A

Hypoglossal

Motor

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16
Q

What nerve does not come from the brainstem?

A

CN I (olfactory) → comes from olfactory bulb

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17
Q

CN I (olfactory) leaves the skull through?

A

Cribiform plate

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18
Q

Which nerve is technically a tract?

A

CN II (optic n.)

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19
Q

CN II (optic) connects?

A

Retina with diencephalon

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20
Q

Vision pathway

A
  1. Retina
  2. Optic n.
  3. Optic chiasm
  4. Optic tract
  5. Lateral geniculate nucleus
  6. Optic radiation
21
Q

CN III (oculomotor) arises from?

A

Ventral aspect of mesencephalon

22
Q

Where do oculomotor GVE fibers synapse?

A

Ciliary ganglion

23
Q

Postganglionic oculomotor GVE fibers

A

Pass through ciliary nn. to supply ciliary and constrictor pupillae mm.

24
Q

3 clinical signs of oculomotor n. dysfunction?

A
  1. Lateral strabismus
  2. Ptosis of superior eyelid
  3. Mydriasis
25
Q

Strabismus

A

Abnormal pointing of eye

26
Q

Ptosis

A

Drooping

27
Q

Mydriasis

A

Dilation of pupil

28
Q

Pupillary light reflex pathway

A
  1. Retina
  2. Optic n.
  3. Optic chiasm
  4. Optic tract
  5. Pretectal nuclei
  6. Parasympathetic nucleus of CN III
  7. Ciliary ganglion
29
Q

CN IV (trochlear) arises from/

A

Dorsal aspect of mesencephalon

30
Q

Clinical signs of CN IV (trochlear) dysfunction

A

Extorsion of eye

31
Q

CN V (trigeminal) arises from?

A

Metencephalon

32
Q

Mandibular n. function

A
  1. Sensory to inferior arcade, lip, tongue

2. Motor to mm. of mastication (except cd. belly of digastricus)

33
Q

CN VI (abducens) arises from?

A

Myelencephalon

34
Q

Clinical signs of CN VI (abducens) dysfunction

A

Medial strabismus

35
Q

CN VII (facial) arises from?

A

Myencephalon

36
Q

How does VII (facial) give taste sensation to the rostral 2/3 of the tongue?

A

Via chorda tympani communication with lingual n.

37
Q

Parasympathetic fibers of CN VII (facial) go to

A
  1. Lacrimal gland
  2. Nasal gland
  3. Palatine gland
  4. Mandibular salivary gland
  5. Sublingual salivary gland
38
Q

GVE fibers of CN VII (facial) go to the lacrimal, nasal and palatine glands via?

A

Pterygopalatine ganglion

39
Q

Only cranial nerve to originate from dorsal aspect of brain?

A

CN IV (trochlear)

40
Q

CN VIII (vestibulocochlear) arises from?

A

Myelencephalon near facial n.

41
Q

CN IX (glossopharyngeal) arises from?

A

Lateral aspect of myencephalon

42
Q

GVE fibers of CN IX (glossopharyngeal) supply?

A

Parotid and zygomatic salivary glands

43
Q

Vagus n. arises from?

A

Lateral aspect of myelencephalon (in line with glossopharyngeal n.)

44
Q

2 sensory ganglia associated with vagus n.

A
  1. Proximal ganglion

2. Distal ganglion

45
Q

What vagus fibers synapse at the cr. cervical ganglion?

A

Sympathetic

46
Q

What vagus fibers synapse at the distal ganglion?

A

Parasympathetic

47
Q

Proximal ganglion location

A

Jugular foramen (cannot be seen)

48
Q

Distal ganglion location

A

Caudal to the cr. cervical ganglion

49
Q

CN IX - XI exits cranial cavity via _____ and emerges from skull via _____

A

Jugular foramen, tympano-occipital fissure

Gross Anatomy Exam 4 (17 decks)

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