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Neuro > 15: Motor Cranial Nerves > Flashcards

15: Motor Cranial Nerves Flashcards

1
Q

name the motor cranial nerves

A

V, VII, XI, X, XI, XII

3, 4, 6 COVERED IN ANOTHER LECTURE BUT ALSO HAVE MOTOR FUNCTIONS

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2
Q

muscles of mastication, tensor tympani muscle

A

CN V -trigeminal-Motor Nucleus of V

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3
Q

muscles of facial esxpression, stepedius muscle

A

CN VII- Facial- Facial N.

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4
Q

lacrimal and all salivary glands except the parotid

PARASEYMPATHETIC

A

CN VII- Nervus Intermedius (facial)- superior salivatory nucleus

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5
Q

Stylopharyngeal muscle- popping ears?

A

CN IX- glossopharyngeal- nucleus ambiguus

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6
Q

parotid gland salivation

PARASYMPATHETIC

A

CN IX, lesser petrosal n, inferior salivatory

nucleus

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7
Q

PHARYNGEAL muscles (swallowing), laryngeal muscles voice

A

CN X , Vagus, nucleus ambiguus

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8
Q

Heart Lung, GI tract

PARASYMPATHETIC

A

CN X vagus, dorsal motor nucleus of X

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9
Q

sternocleidomastoid muscle, trapezius

A

CN XI, spinal accessory Nerce, spinal accessory nucleus

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10
Q

intrinsic tongue muscles

A

CN XII, hypoglossal, hypoglossal nucleus

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11
Q

motor fibers of CN V travel with _______ to exit the cavlarium at _______, to innvervate

A

V3 (mandibular fibers

foramen ovale

muscles of mastication including masseter and temporalis

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12
Q

CN V exits bstem @

A

mid pons level with motor fibers traveling in the V 3 mandiublar branch

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13
Q

CN V exits calvarium via

A

foramen ovale

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14
Q

sensory fibers in CN V synapse in the

A

mesenphalic nucleus–then short interneuron to motor nucleus of V-contraction

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15
Q

motor fibers of V innervate which muscles

A 
Temporalis
Masseter
Tensor Typani (dampens sound)
mylohyopid (elevates hyoid_
Anterior Belly of Digastric
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16
Q

2 nuclei serving the CN VII

A

motor-facial nucleus -mid pons
Parasympathetic- superior salivary nucleus -midline of rostral medulla-pregang PANS
*both out with CN VII

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17
Q

Facial Nerve Motor serves_____

A

facial expression muscles, stapedius muscle

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18
Q

superior salivary nucleus serves

A

lacrimal gland and submandibular gland for salivaiton

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19
Q

Facial nucleis exits via the

A

facial nerve

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20
Q

superior salivayr nucleus exits as

A

nervus intermedius and joins with CN VII to synapse in several ganglia

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21
Q

PANS fibers running with seven synapse on which ganglia

A

sphenopalatine/ pterygopalatine ganglion as well as the submandibular ganglia

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22
Q

CN VII and Nervus intermedius exit b stem @

A

pontomedullary junciton-cerebellopontine angle

so does VI but VI is more medial

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23
Q

before exiting at the dorsal pontomedullary junction-CN VII fibers…

A

turn medially and dorsally and pass over the Abducent nucleus creating the facial colliculus-caudal to the sup.inf colliculi

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24
Q

what makes up the facial colliculus

A

BULDGE IN THE FLOOR of the 4th ventricle

–>CN VI fibers running over the top of CN VI nuclei

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25
Q

CN VII and NI exit via what from the calvarium

A

IAM->auditory canal of petrous bone

within which 7 bends ventrally to enter facial canal and exits stylomastoid foramen

26
Q

5 motor branches of CN VII in the parotid gland

A 
"to Zanzibar by motor car"
temporal
zygomatic
buccal
mandibular
cervical
27
Q

upper motor neurons to CN VII motor function

A

bilateral for forehead, unilateral for muscles of the face

28
Q

CN VIIStroke causing–> unilateral UMN lesions to motor cortex associated with seven or corticiobulbar lesions result in

A

unilateral weakness, or contralateral lower facial muscles-but spares the forehead muscles

29
Q

CN VII-unilateral LMN lesion cuases

BELL’S PALSY

A

ipsilateral weakness, of lower face, forehad muscles included, ipsilateral hypercusis, dry eye-Bells palsy

30
Q

CN XI NUCLEI

A

MOTOR- nucleus ambiguus (near pontomedullary junction-innervates stylopharyngeus
PANS- inferior salivatory nucleus-lesser petrosal -otic ganglion-parotid gland

31
Q

CN IX exits brain stem @

A

juntion of pons and medulla

32
Q

CN IX exits calvarium via

A

jugular foramen

33
Q

nucleus ambiguss share by

A

CN IX and X

34
Q

raises the pharynx during swalloing

A

stylopharyngeal muscle

35
Q

testing CN IX lesion

A

UMN and LMN=dysphagia

motor function tough to isolate bc gag reflex shared with ten
best done via sensory function

36
Q

motor of CN X found in

A

Nucleus ambiguus

37
Q

PANS for CN X found in

A

dorsal motor nucleus of X`

38
Q

nucles ambiguus lies where in the brain stem

A

lateral medulla

39
Q

Dorsal motor nucleus lies where in the b stem

A

near midline of medulla

40
Q

DMG of X sends PANS pregang fibers to

A

intramural ganglia of target organs

heart, lungs, digestive tract up to proximal 2/3 of transverse colon

41
Q

CN X exits where from b stem

A

bw inferior olive and inferior cerebellar peduncle

42
Q

CN X exits calvarium via

A

jugular foramen

43
Q

CN X is motor to what muscles

A

pharyngeal, laryngeal, palate muslces

44
Q

testing CN X

A

palatal elevation devaites to the side of the lesion

45
Q

gag reflex

A

sensory= CN IX

Motor to elevate palate= Mostly X but IX as well

46
Q

unilateral LMN lesion of ten causes

A

hoarseness of the voice, difficulty swallowing, reduced gag reflex on the stimulated side

47
Q

UMN vs LMNS for vagus

A

UMNS=less prominent signs -substantial bilateral UMN innervation of CN X

48
Q

CN XI controls

A

head turning thru elevation of the SCM and shoulder elevation of trapezius

49
Q

CN IX recieves motor imputs from 2 nuclei

A

Nucleus Ambiguus, spinal accessory nucleus

50
Q

fibers from ambiguus travel only a short distance with CN XI before joining

A

CN X–innervate the pharynx and larynx

*considered vagus

51
Q

spinal accessroy nuclei lie in

A

intermediolateral gray area between dorsal and ventral horn-C1-5–Ascend to ender calvaria

52
Q

SPinal Accessroy rootles ascend and enter the calvaria @

A

foramen magnum

53
Q

CN XI exits calvaria @

A

jugular foramen

54
Q

jugular formaen permits exit of which three nerves

A

9, 10, 11

55
Q

copntraction of right SCM-

A

head turns left

56
Q

Unilateral LMN CN XI lesion

A

weakness and atrophy of SCM and TRAP on the ispsilateral side

57
Q

cant raise right shoulder

cant turn head left

A

UNilateral LMN lesion or lesion in nucleus of right spinal accessory nerve

58
Q

UMN controlling CN XI

A

weakness of contralateral shoulder elevation

weakness of ipsilateral SCM muscle-ie weakness in turning head to the right

59
Q

CN XII-motor to tongue-exits brain

A

ventrall between the inferior olives and the pyramids

60
Q

betwee inferior olives and pyramids

and between medulla and brian stem

A

hypoglossan nerve and entering the hypoglossal canal

61
Q

unilateral LMN of CN XII leasion

A

protrusion of the tongue towards the lesion side-causing unilateral atrophy and fasciculations

62
Q

UMN lesions of corticobulbar fibers

right lesion-left deviation

A

contralateral lesions

right lesions-left atrophy and fasculiations with a deviation

Neuro (19 decks)

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