Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Quiz 6 > Spencer's Cranial Nerves Deck > Flashcards

Spencer's Cranial Nerves Deck Flashcards

1
Q

Which two cranial nerves are not technically “cranial nerves”?

A

CN I & II

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The Olfactory nerve is really an extension of what part of the brain?

A

the Telencephalon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The Optic nerve is really an extension of what part of the brain?

A

the Diencephalon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Where does CN I principally exit the skull?

A

cribiform foramina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Where does CN I synapse?

A

the olfactory bulb and tract

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Where does sensory input for CN I first arise?

A

receptors in the nasal cavity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What clinical presentations would follow loss of function of CN I?

A

anosmia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Where does CN II first receive sensory input?

A

the retina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What specific type of sensory information is relayed by CN I & II

A

special sensory

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What pathway of the optic nerve lies between the optic canal and optic tract?

A

the optic chiasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What clinical findings would follow a loss of function of CN II?

A

blindness, loss of pupillary light reflex, and visual field problems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Where does CN III originate?

A

the midbrain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Where does CN II principally exit the skull?

A

the optic canal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where does CN III principally exit the skull?

A

the superior orbital fissure (SOF)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

CN III has somatic motor innervation of which extraoccular muscles?

A

inferior oblique, inferior rectus, medial rectus, superior rectus and the levator palpebrae superioris

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

CN III has visceral motor innervation of which eye structures?

A

sphincter pupillae (constrictor) and ciliary muscle (accomodation)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are the clinical findings following a loss of function in CN III?

A

Ptosis, mydriasis, loss of pupillary light reflex,and eyes move down and out

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Where do the visceral motor neurons in CN III synapse?

A

the ciliary ganlgion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Where does CN IV orginate in the brain?

A

the midbrain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Through which cranial fossa does CN IV exit through?

A

the Superior orbital fissure (SOF)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Which muscle is innervated by the CN IV somatic motor division?

A

the superior oblique

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What clinical findings would follow a loss of function to CN IV?

A

Inability to look inferiorly and medially

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is the origin of CN VI in the brain?

A

the pons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Through which cranial fossa does CN VI exit?

A

the superior orbital fissure (SOF)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Which muscle is innervated by the CN VI somatic motor division?

A

the lateral rectus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What clinical findings would follow a loss of function of CN VI?

A

inability to look laterally

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Where does CN V originate?

A

the pons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What are the names of the three branches of CN V?

A

Ophthalmic branch (V-1), Maxillary branch (V-2), Mandibular branch (V-3)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Through which cranial fossa does CN V-1 exit the skull?

A

the Superior orbital fissure

30
Q

CN V-1 provides sensory innervation of what areas?

A

the scalp, forehead, upper eyelid, cornea, and bridge of the nose

31
Q

Through what cranial fossa does CN V-2 exit the skull?

A

the foramen rotundum

32
Q

What areas does CN V-2 provide sensory innervation of?

A

the sides of then nose, lower eyelid, upper lip, maxillary teeth, gums, palate, nasal cavity and paranasal sinuses

33
Q

Through which structure does CN V-2 pass to innervate the skin of the face?

A

the infraorbital foramen

34
Q

Through which cranial fossa does CN V-3 exit the skull?

A

foramen ovale

35
Q

To which structures does CN V-3 provide sensory innervation?

A

lower lip, mandibular teeth, gums, palate, anterior tongue

36
Q

Through which structure does CN V-3 pass to innervate the skin of the chin?

A

mental foramen

37
Q

To which major muscles does CN V-3 provide somatic motor innervation?

A

the temporalis and masseter (elevate mandible) and the medial and lateral pterygoid muscles (side to side motion of mandible)

38
Q

To which additional muscles does CN-V3 provide somatic motor innervation?

A

tensor tympani, tensor veli palatini, mylohyoid, and anterior digastric muscles

39
Q

What constitutes a consensual reflex?

A

a reflex in which triggering one side of the body will also trigger the reflex on the other side

40
Q

Before reaching its branch point, CN VII passes through what foramen of the skull?

A

internal acoustic meatus

41
Q

Where does CN VII originate in the brain?

A

the pons

42
Q

What is the path of the facial nerve proper after the branch point?

A

stylomastoid foramen -> parotid gland -> 5 branches to muscles of facial expression

43
Q

the facial nerve proper provides what type of innervation?

A

branchial motor innervation to the muscles of facial expression

44
Q

What clinical findings would accompany a disruption in or loss of function of the facial nerve proper?

A

facial palsy

45
Q

What are the three main branches of CN VII?

A

facial nerve proper, chorda tympani nerve, and greater petrosal nerve

46
Q

What is the pathway of the chorda tympani nerve after the branch point?

A

tympanic membrane -> petrotympanic fissure -> paired pathway with lingual branch of CN V-3

47
Q

What type of innervation is provided by the chorda tympani nerve?

A

VM- submandibular & sublingual salivary glands SS- taste for anterior 2/3 tongue

48
Q

What clinical findings would accompany a disruption in or loss of function of the chorda tympani nerve?

A

loss of taste and reduced salivation

49
Q

What is the pathway of the greater petrosal nerve after the branch point?

A

palatine branches

50
Q

What type of innervation is provided by the greater petrosal nerve?

A

VM- lacrimal, nasal, palatine glands SS- taste from palate

51
Q

What clinical findings would accompany a disruption in or loss of function of the greater petrosal nerve?

A

loss of lacrimation, dry nasal cavity

52
Q

What is the pathway that sensory information relayed by CN VIII travels to reach the brain?

A

cochlea & SC canals -> internal acoustic meatus -> pons

53
Q

What type of information is relayed to the brain by CN VIII?

A

SS- hearing and balance

54
Q

Which nuclei of CN VIII relay information about sound? To which part of the brain?

A

cochlear nuclei; pons

55
Q

Which nuclei of CN VIII relay information about balance? To which part of the brain?

A

vestibular nuclei; pons & medulla oblongata

56
Q

What clinical findings would accompany a disruption in or loss of function of CN VIII?

A

loss of hearing and balance (equillibrium)

57
Q

Where do CN IX & X originate in the brain? Where do they exit the skull?

A

medulla; jugular foramen

58
Q

What functions are innervated by CN IX?

A

BM- stylopharyngeus VM- parotid gland SS- taste for posterior 1/3 tongue GS- posterior 1/3 tongue, oral pharnyx VS- carotid sinus & body

59
Q

What functions are innervated by CN X?

A

BM- muscles of palate, pharynx, larynx VM- thoracic & abdominal viscera GS- laryngopharnyx, larynx VS- thoracic & abdominal viscera

60
Q

Where does CN XI orginate in the brain and through what pathways does it exit the skull?

A

upper cervical spinal cord & medulla; foramen magnum & jugular foramen

61
Q

What type of innervation is provided by CN XI?

A

BM- sternocleidomastoid & trapezius

62
Q

What clinical findings would accompany injury or loss of function of CN XI?

A

difficulty shrugging shoulders or rotating head to look over opposite shoulder

63
Q

Where does CN XII orginate in the brain, and how does it exit the skull?

A

medulla; hypoglossal canal

64
Q

What innervation is provided by CN XII?

A

SM- control of tongue movements (genioglossus muscle)

65
Q

What clinical findings would accompany an injury or loss of function to CN XII?

A

loss of motor function to tongue; tongue deviates to one side when outside of mouth

66
Q

The phrase “lick your wound” applies to the scenario of an injured/impinged CN XII how?

A

The tongue deviation, when outside of mouth, will be to the side that is injured. I.e. right injury -> right deviation

67
Q

What are the five branches of the facial nerve proper?

A

temporal, zygomatic, buccal, marginal mandibular and cervical

68
Q

The greater petrosal nerve joins what other nerve as it courses superiorly to the lacrimal gland?

A

the maxillary branch of the trigeminal nerve (CN V-2)

69
Q

The chorda tympani nerve joins what other nerve as it courses to the tongue?

A

the mandibular branch of the trigeminal nerve (CN V-3)

70
Q

Which two nerves are involved in the corneal reflex?

A

CN V-1 (sensory) and the chorda tympani (CN VII) (motor)

71
Q

Where do all sympathetic nerves in the head orginate?

A

T1 spinal cord

72
Q

Which cranial nerves have parasympathetic activity?

A

CN III, VII, IX, and X

Quiz 6 (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions