N41, 42

Question 1

basal plate

Answer 1

ventral horn

Question 2

basal plate gives rise to

Answer 2

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

Question 3

alar plate

Answer 3

dorsal horn

Question 4

alar plate gives rise to

Answer 4

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

Question 5

CN with GSE

Answer 5

3, 4, 6, and 12

Question 6

CN with Special visceral efferents (SVE)

Answer 6

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

Question 7

CN with GVE (parasympathetic)

Answer 7

3, 7, 9, 10

Question 8

Corticonuclear projections arise from

Answer 8

SMA, PMC, and MI

Question 9

Bilateral except

Answer 9

CN 7 and 12

Question 10

motor of GSE of CN 3 oculomotor

Answer 10

ipsilateral nuclei to ipsilateral nerve

Question 11

GVE of CN 3 oculomotor

Answer 11

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

Question 12

Lesion to CN 3

Answer 12

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

Question 13

GSE of CN 4 trochlear

Answer 13

innervate contralateral superior oblique m

Question 14

Lesion to CN4

Answer 14

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

Question 15

GSE of CN 6

Answer 15

innervates IPSILATERAL lateral rectus

Question 16

Lesion to CN6

Answer 16

IPSILATERAL medial strabismus, inability to laterally gaze

Question 17

SVE of trigeminal

Answer 17

Mandibular division, bilateral innervation

Question 18

Corneal reflex

Answer 18

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

Question 19

Lacrimal tear reflex

Answer 19

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

Question 20

Upper facial m are innervated by

Answer 20

bilateral facial n

Question 21

Lower facial m are innervated by

Answer 21

contralateral facial n

Question 22

GVE of CN 7

Answer 22

ipsilateral pterygopalatine –> greater petrosal

Question 23

Lesion to CN 7

Answer 23

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

Question 24

Lesion to LMN CN7 peripheral to stylomastoid foramen

Answer 24

Bells Palsy: paralysis of facial mm

Question 25

Lesion of CN 7 proximal to chorda tympani

Answer 25

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

Question 26

Lesion of CN 7 proximal to stapedius n

Answer 26

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

Question 27

Lesion of CN 7 proximal to geniculate ganglion

Answer 27

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

Question 28

UMN lesion to Facial n

Answer 28

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

Question 29

SVE of CN 9

Answer 29

ipsilateral glossopharyngeal n.

Question 30

GVE to CN 9

Answer 30

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

Question 31

Lesion to CN 9

Answer 31

loss of parotid salvation and gag reflex

Question 32

SVE of CN 10

Answer 32

ipsilateral vagus to soft palate pharynx and larynx

Question 33

GVE of CN 10

Answer 33

innervation to mucous membranes (heart rate)

Question 34

unilateral lesion of CN 10

Answer 34

ipsilateral paralysis of soft palate, vocal cord palsy

Question 35

bilateral lesion to CN 10

Answer 35

death; asphyxiation

Question 36

SVE of spinal accessory

Answer 36

innervation to ipsilateral SCM and trapezius

Question 37

Lesion to CN 11

Answer 37

ipsilateral shoulder sag, plegia when pointing chin away from lesion

Question 38

GSE of CN 12

Answer 38

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

Question 39

lesion to LMN CN 12

Answer 39

deviation of tongue toward lesion, atrophy, fasciculations

Question 40

lesion to UMN CN 12

Answer 40

contralateral paresis and tongue deviated away from lesion

Question 41

Brainstem lesion

Answer 41

ipsilateral LMN for CN and contralateral UMN signs for CST

Question 42

Medial medullary syndrome

Answer 42

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

Question 43

Alternating Abducens hemiplegia

Answer 43

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

Question 44

"Weber's Syndrome" Alternating Oculomotor hemiplegia

Answer 44

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