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Neuro > N41, 42 > Flashcards

N41, 42 Flashcards

1
Q

basal plate

A

ventral horn

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2
Q

basal plate gives rise to

A

General somatic efferents and general visceral efferents (GSE and GVE)

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3
Q

alar plate

A

dorsal horn

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4
Q

alar plate gives rise to

A

General somatic afferents and general visceral afferents (GSA and GVA)

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5
Q

CN with GSE

A

3, 4, 6, and 12

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6
Q

CN with Special visceral efferents (SVE)

A

5, 7, 9, 10, 11 (branchial arches)

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7
Q

CN with GVE (parasympathetic)

A

3, 7, 9, 10

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8
Q

Corticonuclear projections arise from

A

SMA, PMC, and MI

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9
Q

Bilateral except

A

CN 7 and 12

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10
Q

motor of GSE of CN 3 oculomotor

A

ipsilateral nuclei to ipsilateral nerve

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11
Q

GVE of CN 3 oculomotor

A

Edinger-Westphal nucleus –> ciliary ganglion –> sphincter pupillae and ciliary mm

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12
Q

Lesion to CN 3

A

IPSILATERAL ptosis, lateral strabismus, mydriasis, pupillary light reflex absent, inability to laterally gaze

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13
Q

GSE of CN 4 trochlear

A

innervate contralateral superior oblique m

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14
Q

Lesion to CN4

A

CONTRALATERAL affected eye is elevated, diplopia in vertical plane (difficulty with steps)

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15
Q

GSE of CN 6

A

innervates IPSILATERAL lateral rectus

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16
Q

Lesion to CN6

A

IPSILATERAL medial strabismus, inability to laterally gaze

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17
Q

SVE of trigeminal

A

Mandibular division, bilateral innervation

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18
Q

Corneal reflex

A

stimulus to cornea –> opthalmic div of CN V –> spinal trigeminal nucleus –> facial motor nucleus –> facial n to orbicularis oculi –> both eyes close

19
Q

Lacrimal tear reflex

A

stimulus to cornea –> opthalmic div of CN V –> spinal trigeminal nucleus–> bilateral GVE superior salivatory nucleus –> facial n GVE –> pterygopalatine –> greater petrosal –> lacrimal gland

20
Q

Upper facial m are innervated by

A

bilateral facial n

21
Q

Lower facial m are innervated by

A

contralateral facial n

22
Q

GVE of CN 7

A

ipsilateral pterygopalatine –> greater petrosal

23
Q

Lesion to CN 7

A

LMN: complete ipsilateral facial paralysis
Motor Cortex: innervation to eye is provided by contralateral innervation, only innervation to contralateral mouth is affected.

24
Q

Lesion to LMN CN7 peripheral to stylomastoid foramen

A

Bells Palsy: paralysis of facial mm

25
Q

Lesion of CN 7 proximal to chorda tympani

A

facial m paralysis and loss of taste to anterior 2/3 tongue

26
Q

Lesion of CN 7 proximal to stapedius n

A

facial m paralysis and loss of taste to anterior 2/3 tongue + hyperacusis

27
Q

Lesion of CN 7 proximal to geniculate ganglion

A

facial m paralysis and loss of taste to anterior 2/3 tongue + hyperacusis + absence of lacrimation

28
Q

UMN lesion to Facial n

A

weakness of m. of contralateral LOWER face only, no fasciculations, disuse atrophy

29
Q

SVE of CN 9

A

ipsilateral glossopharyngeal n.

30
Q

GVE to CN 9

A

inferior salvitory to ipsilateral glossopharyngeal n –> tympanic plexus –> lesser petrosal –>

31
Q

Lesion to CN 9

A

loss of parotid salvation and gag reflex

32
Q

SVE of CN 10

A

ipsilateral vagus to soft palate pharynx and larynx

33
Q

GVE of CN 10

A

innervation to mucous membranes (heart rate)

34
Q

unilateral lesion of CN 10

A

ipsilateral paralysis of soft palate, vocal cord palsy

35
Q

bilateral lesion to CN 10

A

death; asphyxiation

36
Q

SVE of spinal accessory

A

innervation to ipsilateral SCM and trapezius

37
Q

Lesion to CN 11

A

ipsilateral shoulder sag, plegia when pointing chin away from lesion

38
Q

GSE of CN 12

A

ipsilateral innervation to intrinsic and extrinsic mm of tongue; corticonuclear projections are contralateral

39
Q

lesion to LMN CN 12

A

deviation of tongue toward lesion, atrophy, fasciculations

40
Q

lesion to UMN CN 12

A

contralateral paresis and tongue deviated away from lesion

41
Q

Brainstem lesion

A

ipsilateral LMN for CN and contralateral UMN signs for CST

42
Q

Medial medullary syndrome

A

anterior spinal artery, hypoglossal hemiplegia, contralateral UMN loss for CST, contralateral loss of tactile sensation

43
Q

Alternating Abducens hemiplegia

A

Basilar a, LMN for ipsilateral abducens, contralateral UMN for CST

44
Q

“Weber’s Syndrome” Alternating Oculomotor hemiplegia

A

posterior cerebral a., LMN for ipsilateral CN 3 and contralateral UMN for CST

Neuro (23 decks)

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