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CN Nuclei Flashcards

1
Q

CN 1

A

Olfactory

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2
Q

CN 2

A

Optic

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3
Q

CN 3

A

Oculomotor

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4
Q

CN 4

A

Trochlear

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5
Q

CN 5

A

Trigeminal

  • V1- opthalmic
  • V2- Maxillary
  • V3- Mandibular
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6
Q

CN 6

A

Abducens

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7
Q

CN 7

A

Facial

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8
Q

CN 8

A

Vestibulocochlear

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9
Q

CN 9

A

Glossopharyngeal

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10
Q

CN 10

A

Vagus

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11
Q

CN 11

A

Accessory (or spinal accessory)

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12
Q

CN 12

A

Hypoglossal

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13
Q

Function(s) of: CN 1

A

Smell

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14
Q

Function(s) of: CN 2

A

Vision

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15
Q

Function(s) of: CN 3

A
  • Motor to:
    • Extraocular muscles:
      • Medial Rectus
      • Superior Rectus
      • Inferior Rectus
      • Inferior Oblique
    • Levator palpebrae
    • Ciliary muscles
    • Pupillary sphincter
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16
Q

Function(s) of: CN 4

A
  • Motor to:
    • Superior Oblique Extraocular muscle
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17
Q

Function(s) of: CN 5

A
  • Facial Sensation
  • Touch sensation on anterior 2/3 of tongue (V3)
  • Motor to muscles of mastication (V3)
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18
Q

Function(s) of: CN 6

A
  • Motor to:
    • Lateral Rectus
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19
Q

Function(s) of: CN 7

A
  • Motor to: (all from 2nd brachial arch)
    • Muscles of facial expression
    • Stylohyoid
    • Posterior belly of digastric
    • Stapedius
  • Parasympathetic to:
    • Lacrimal glands
    • Submandibular glands
    • Sublingual glands
  • Taste Sensation to anterior 2/3 of tongue
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20
Q

Function(s) of: CN 8

A
  • Vestibular sense (equilibrium)
  • Hearing
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21
Q

Function(s) of: CN 9

A
  • Motor to:
    • Stylopharyngeus
  • Parasympathetic to:
    • parotid gland
  • Sensory to:
    • carotid sinus/bodies
  • Touch sensation to:
    • pharynx
    • Posterior 1/3 of tongue
  • Taste sensation to:
    • Posterior 1/3 of tongue
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22
Q

Function(s) of: CN 10

A
  • Motor to:
    • Pharynx
    • Larynx
  • Parasympathetic to:
    • Heart
    • Gi Tract
  • Sensory to:
    • Pharynx
    • Trachea
    • Esophagus
  • Taste sensation to:
    • Most posterior portion of tongue
23
Q

Function(s) of: CN 11

A
  • Motor to:
    • Sternoclidomastoid
    • Trapezius
24
Q

Function(s) of: CN 12

A
  • Motor to:
    • Intrinsic tongue muscles (stick out tongue)
25
Q

Movement of Superior Rectus Extraocular Muscle

A

Elevates when Abducted

26
Q

Movement of Inferior Rectus Extraocular Muscle

A

Lower when Abducted

27
Q

Movement of Inferior Oblique Extraocular Muscle

A

Elevates when Adducted

28
Q

Movement of Superior Oblique Extraocular Muscle

A

Lower when Adducted

29
Q

How to test function and result of a lesion to CN 1

A
  • Function Testing:
    • Identify a recognizable odor
  • Result of Lesion:
    • Anosmia
30
Q

How to test function and result of a lesion to CN 2

A
  • Function Testing:
    • Visual acuity
    • Pupillary reflexes
    • Visual fields
  • Result of Lesion:
    • Decreased visual acuity
    • impaired pupillary reflexes
    • Visual field defects
31
Q

How to test function and result of a lesion to CN 3

A
  • Function Testing:
    • Test extraocular muscles
    • Inspect lid symmetry
    • Pupillary reflexes
  • Result of Lesion:
    • Eye Deviates DOWN and OUT
    • Ptosis
    • Impaired accomodation
    • Pupil Dilation
32
Q

How to test function and result of a lesion to CN 4

A
  • Function Testing:
    • Test extraocular muscles
  • Result of Lesion:
    • Eye deviates UP and IN
    • Ptosis
33
Q

How to test function and result of a lesion to CN 5

A
  • Function Testing:
    • Pinprick/light touch on face
    • Corneal reflex
    • Lacrimation reflex
    • Open or clench jaw
  • Result of Lesion:
    • Sensory deficits
    • Trigeminal neuralgia (usually from compression)
    • Jaw weakness
34
Q

How to test function and result of a lesion to CN 6

A
  • Function Testing:
    • Test extraocular muscles
  • Result of Lesion:
    • Eye deviates MEDIALLY
    • Ptosis
35
Q

How to test function and result of a lesion to CN 7

A
  • Function Testing:
    • Wrinkle forehead
    • Furrow eyebrows
    • Puff cheeks
    • Close eyes tightly
  • Result of Lesion:
    • Facial muscle weakness
    • Bells palsy
    • Dry Eyes
    • Dry mouth
    • Impaired taste
36
Q

How to test function and result of a lesion to CN 8

A
  • Function Testing:
    • Test hearing
  • Result of Lesion:
    • Nystagmus
    • Vertigo
    • Balance problems
    • Hearing loss
37
Q

How to test function and result of a lesion to CN 9

A
  • Function Testing:
    • Gag reflex (also tests vagus)
  • Result of Lesion:
    • Dry mouth
    • BP and HR dysregulation
    • Impaired swallowing
    • Impaired taste
38
Q

How to test function and result of a lesion to CN 10

A
  • Function Testing:
    • Elevate the palate (say ah)
    • Gag reflex
    • Assess voice quality
  • Result of Lesion:
    • Impaired swallowing
    • Dysphonia (hoarseness)
    • Uvula deviation
39
Q

How to test function and result of a lesion to CN 11

A
  • Function Testing:
    • Turn head
    • Shrug shoulders
  • Result of Lesion:
    • Neck/Shoulder weakness
40
Q

How to test function and result of a lesion to CN 12

A
  • Function Testing:
    • Stick out tongue
  • Result of Lesion:
    • Tongue deviation (deviates to side of lesion/Lick your lesion)
41
Q

Site of exit of CN 1

A

Cribiform plate (fracture may sever branches)

42
Q

Site of exit of CN 2

A

Optic canal

43
Q

Site of exit of CN 3

A

Superior orbital fissure

44
Q

Site of exit of CN 4

A

Superior orbital fissure

45
Q

Site of exit of CN 5

A

V1- Superior orbital fissure V2- Foramen Rotundum V3- Foramen Ovale

46
Q

Site of exit of CN 6

A

Superior orbital fissure

47
Q

Site of exit of CN 7

A

Internal acoustic meatus

48
Q

Site of exit of CN 8

A

Internal acoustic meatus

49
Q

Site of exit of CN 9

A

Jugular Foramen

50
Q

Site of exit of CN 10

A

Jugular Foramen

51
Q

Site of exit of CN 11

A

Jugular Foramen

52
Q

Site of exit of CN 12

A

Hypoglossal Canal

53
Q

Conditions Causing a facial nerve palsy

A
  • Lovely Bella Had An STD
    • Lyme disease
    • Bells Palsy
    • Herpes simplex/zoster
    • AIDS
    • Sarcoidosis
    • Tumors
    • Diabetes

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