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Neuroanatomy Block 2 > Cranial nerve motherload > Flashcards

Cranial nerve motherload Flashcards

1
Q

CN1 is associated what bulb

A

Olfactory bulb

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2
Q

CN2 is associated with what nuclei

A

lateral geniculate N & Superior colliculus Hypothalamus

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3
Q

Where does the CN2 fibers originate?

A

retinal ganglion neurons

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4
Q

What type of sensory fibers are in CN1 and CN2?

A

Special sensory only

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5
Q

CN3 is associated with what nuclei

A

Occulomotor N & Edinger-Westphal N

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6
Q

Fibers from the Occulomotor N innervate?

A

Superior, inferior, medial rectus M
Inferior oblique
Levator palpebrae superiorioris m

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7
Q

CN4 is associated with what nuclei

A

Trochlear N

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8
Q

Which CN3 nuclei is visceral motor? and what does it innervate

A

Edinger-Westphal N –> Sphincter papillae m. and ciliary m

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9
Q

CN5 is assoc with what nuclei

A

Chief sensory N
Mesencephalic N
Spinal N
Trigeminal motor N

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10
Q

Chief sensory N of V innervates

A

skin and deep m of head; dura

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11
Q

Mesencephalic N of V innervates

A

muscle spindles

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12
Q

Spinal N of V innervates

A

skin and deep m of head; dura

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13
Q

Trigeminal motor N of V innervates

A

m of mastication

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14
Q

What type of fibers are CN4 and CN6?

A

Somatic Motor only

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15
Q

CN7 is associated with what nuclei?

A

Solitary N (rostral half)
Spinal N of V
Superior salivatory N
Facial motor N

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16
Q

Solitary N (rostral half) from CN7 innervates

A

tongue= taste buds of rostral tongue, soft palate

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17
Q

Spinal N of V from CN7 innervates

A

ear (ext acoustic meatus, outer TM)

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18
Q

Superior salivatory N from CN7 innervates

A

GLANDS! submadibular, sublingual , lacrimal

  • goes through greater petrosal –> * Pterygopalating g –> Lacrimal
  • goes through chord tympani –> *submandibular g –> submandibular gland
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19
Q

Facial motor N from CN7 innervates

A

m of facial expression
stylohyoid m
posterior digastric m
stapedius m

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20
Q

What foramen does CN7 exit?

A

Internal acoustic meatus

21
Q

What ganglion does all the nuclei assoc with CN7 go through?

A

Geniculate ganglion

22
Q

What nuclei is assoc with CN 8

A

vestibular N

Dorsal/Ventral cochlear N

23
Q

What does the nuclei of CN8 innervate?

A

Organ of Corti, semicircular canals, maculae of utricle and saccule

24
Q

What nuclei are assoc with CN9

A 
Solitary N rostral
Solitary N caudal
Spinal N of V
Inferior salivatory N 
ambiguus N
25
Q

Solitary N rostral from CN9 innervates

A

tongue posterior 1/3

26
Q

Solitary N caudal from CN9innervates

A

carotid body, carotid sinus

27
Q

Spinal N of V from CN9 innervates

A

Nasopharynx, oralpharynx, tympanic cavity, inner leaflet of the TM

28
Q

Inferior salivatory N from CN9

A

parotid gland

29
Q

ambiguus N from CN9

A

stylopharyngeus m.

30
Q

CN X is associated with what nuclei

A 
Solitary N rostral
Solitary N caudal
Spinal N of V
Dorsal motor N of X
ambiguus N

**Similar to 9 except for dorsal motor

31
Q

Solitary N rostral from CN10 innervates

A

taste buds of epiglottis

32
Q

Solitary N caudal from CN10 innervates

A

thoacic and abdominal viscera, larynx mucous membranes

33
Q

Spinal N of V from CN10 innervates

A

auricle

34
Q

Dorsal motor N of X from CN10 innervates

A

thoracic and abdominal viscera

35
Q

ambiguus N from CN10 innervates

A

larynx and pharynx

36
Q

CN 11 accessory N innervates

A

SCM/ Trapezius m

37
Q

CN12 Hypoglossal N innervates

A

M of the tongue

38
Q

CN11 and 12 contain what type of fiber

A

Somatic motor ONLY

so… 4+6+11+12 contain somatic motor ONLY

39
Q

which CN palsies is almost ALWAYS PNS damage?

A

3,4,6 (except gaze palsies)
5
10
11

40
Q

the facial motor nucleus innervates musculature on the ipsilateral or contralateral side of face?

A

Facial motor nucleus = IPSILATERAL

*doesNOT cross

41
Q

a LOWER motor neuron lesion from damage to the facial motor nucleus, what would result?

A

weakness of whole ipsilateral face (can’t blink or close eyes on the bad side)

42
Q

a UPPER motor neuron lesion from damage to the facial motor nucleus, what would result?

A

weakness of the contralateral lower segment of face

43
Q

which part of the face gets bilateral innervation from the corticobulbar tract?

A

upper part of face, forehead

44
Q

if you had damage to the corticobulbar tract on the L side

A

paralysis of the right LMN of face, but right forehead would still be in tact as it still gets input from the contralateral side

45
Q

what type of lesion is bells palsy?

A

a lower motor neuron lesion = COMPLETE paralysis of the L face

46
Q

if smile is asymmetric but eyebrows are symmetric…. this means?

A

CNS damage

47
Q

if smile and eyebrows are asymmetric?

A

PNS damage

48
Q

If smile and eyebrows are symmetric

A

CN3 is perfecto!

Neuroanatomy Block 2 (7 decks)

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