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Neuro final > Cranial nerves > Flashcards

Cranial nerves Flashcards

1
Q

Where is the olfactory cell body?

A

Olfactory epithelium

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2
Q

What is the olfactory course?

A

Through cribriform plate of ethmoid

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3
Q

What does olfactory nerve innervate in periphery?

A

Olfactory epithelium

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4
Q

Where is optic (CN II) cell body?

A

Ganglionic layer of retina

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5
Q

What is optic course?

A

Orbit -> Optic canal -> Optic chiasm -> Optic tract

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6
Q

What does optic nerve innervate?

A

Retina (bipolar cells)

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7
Q

Where is Oculomotor normal motor cell body?

Where is parasympathetic motor cell body?

A

Normal - oculomotor nucleus

Parasympathetic motor - Edinger-Westphal nucleus

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8
Q

What is CN III course? (Parasympathetic)

A

Superior orbital fissure –> ciliary ganglion

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9
Q

What is CN III peripheral innervation?

A

Normal: many eye muscles (you know them)

Parasympathetic: postganglionic short ciliary nerves to constrictor pupillae and ciliary muscles of eyeball

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10
Q

Where is trochlear cell body?

A

Trochlear nucleus

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11
Q

What is CN IV course?

A

Through superior orbital fissure

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12
Q

What does CN IV innervate?

A

Superior oblique muscle

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13
Q

Where are CN V cell bodies? (3 different ones)

A

Motor - Trigeminal motor nucleus

Sensory - Trigeminal ganglion

Sensory (jaw proprioception) - Mesencephalic nucleus

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14
Q

What are the different CN V courses? (3 different ones)

A

Motor - Foramen ovale (V3)

Sensory -
V1 (superior orbital fissure)
V2 (foramen rotundum)
V3 (foramen ovale)

Sensory (jaw proprioception) -
travels with V1-V3

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15
Q

What are the CN V peripheral innervations?

A

(motor/sensory) Face areas

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16
Q

Where is the sensory CN V cell body?

A

Trigeminal ganglion

17
Q

Where is the Abducens cell nucleus?

A

Motor Abducens nucleus (pons)

18
Q

What is the CN VI course?

A

Through superior orbital fissure

19
Q

What does the CN VI innervate?

A

Lateral rectus

20
Q

Where is the facial parasympathetic motor cell body?

A

Superior salivatory nucleus

21
Q

Where is the facial sensory ganglion?

A

Geniculate ganglion

22
Q

Where is the normal facial motor nucleus?

A

Facial motor nucleus

23
Q

Tell me the facial motor course

A

Exits cranial cavity via internal acoustic meatus and exits skull via stylomastoid foramen - muscles of facial expression/stylohyoid/posterior digastric/stapedius

24
Q

Tell me the facial parasympathetic course

A

Cell body in superior salivary nucleus

Exits internal auditory meatus –> 2 spots
1) greater petrosal to pterygopalatine ganglion (this will innervate maxillary nerve branches to nose glands, sinuses, palate, lacrimal gland)

2) chorda tympani to submandibular ganglion (this will innervate submandibular/sublingual glands to the oral cavity glands)

25
Q

Where is the vestibular CN VIII sensory cell body?

A

Vestibular ganglion

26
Q

where’s the cochlear CN VIII sensory cell body?

A

Spiral ganglion

27
Q

What is the course of the CN VIII nerve (vestibular and cochlear separate)

A

Vestibular
Vestibular ganglion –> internal acoustic meatus –> cristae of SC canals and maculae of utricle and saccule

Cochlear
Spiral ganglion –> internal acoustic meatus –> Organ of Corti

28
Q

How many components to glossopharyngeal nerve?

A 
4 -
Normal motor
Parasympathetic  motor
Sensory (taste)
Normal sensory
29
Q

Where is the normal motor CN IX cell body? (and what is its path?)

A

Nucleus ambiguus –> jugular foramen –> stylopharyngeus

30
Q

Where is the parasympathetic motor CN IX cell body? (and what is its course?)

A

Inferior salivatory nucleus –> jugular foramen (lesser petrosal to otic ganglion) –> postganglionic fibers by auriculotemporal nerve to partoid gland

31
Q

Where is taste sensory CN IX cell body and its course?

A

Inferior ganglion –> jugular foramen –> taste buds of circumvallate papillae

32
Q

Where is normal sensory CN IX cell body? Course?

A

Inferior ganglion/superior ganglion –> jugular foramen –> pharyngeal wall, posterior 1/3 of tongue, Eustachian tube, carotid sinus/body

33
Q

What are the components of the Vagus nerve CN X?

A

Normal motor
Parasympathetic motor
Normal sensory
Taste sensory

34
Q

Where is the motor component of CN X and what is its course?

A

Nucleus ambiguus –> jugular foramen –> recurrent/external branch of superior laryngeal nerve –> pharyngeal and laryngeal muscles

35
Q

What’s the path of the parasympathetic motor CN X?

A

Dorsal motor nucleus/nucleus ambiguus –> jugular foramen –> preganglionic fibers to viscera of thorax and abdomen - preganglionic parasympathetic to the heart

36
Q

What’s the path of sensory CN X?

A

Superior/inferior ganglion –> jugular foramen –> Auricular branch to ear, pharynx, larynx, trachea, esophagus etc…

37
Q

What’s taste path of sensory CN X?

A

Inferior ganglion –> jugular foramen –> taste buds in epiglottis

38
Q

What’s the path of CN XI?

A

Accessory nucleus C1-C5 –> foramen magnum –> jugular foramen –> sternocleidomastoid/trapezius

39
Q

What’s the path of CN XII?

A

Hypoglossal nucleus –> hypoglossal canal –> tongue muscles

Neuro final (6 decks)

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