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HS Block 3 > All things cranial nerves > Flashcards

All things cranial nerves Flashcards

1
Q

Cranial nerves contain any of the following

A

sensory axons, somatic motor axons (voluntary), parasympathethic motor axons (ANS/involuntary)

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2
Q

CN I

A

olfactory nerves

sensory only - olfaction

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3
Q

CN I leaves anterior cranial fossa through which opening

A

cribriform foramina

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4
Q

Cranial nerves assoication with orbit

A

cn II, cn III, CN IV, CN V(1), CN VI

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5
Q

CN II

A

optic

sensory only - involved in vision

enters orbit through the optic canals

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6
Q

CN III

A

oculomotor

Has somatic motor and parasymp motor function

leaves the middle cranial fossa through the superior orbital fissure

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7
Q

CN III somatic motor muscles

A

levator palpebrae superioris
superior rectus
inferior rectus
medial rectus
inferior oblique

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8
Q

CN III parasymp motor

A

innervation to ciliary body and sphincter pupillae

constricts the pupil and contracts ciliary muscles

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9
Q

CN IV

A

trochlear nerve

somatic motor only - innervates superior oblique muscle

leaves middle cranial fossa through superior orbital fissure

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10
Q

CN VI

A

abducens nerve

somatic motor only –> to lateral rectus muscle

leave middle cranial fossa through superior orbital fissure

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11
Q

CN V

A

Trigeminal nerve

sensory and somatic motor functions

innervates pharyngeal arch 1 structures and meninges

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12
Q

V1 of CN V

A

V1 - ophthalmic - sensory to the skin the frontonasal prominence, upper eyelid, orbit, anterosuperior part of nasal cavity, cornea

exits via the superior orbital fissure

branches into frontal branch, nasocillary branch, lacrimal branch

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13
Q

V2 of CN V

A

maxillary

sensory nerve only

innervates skin of maxillary prominence, lower eyelid, nostrils, posterior nasal cavity, nasopharynx, palate, maxillary teeth, maxillary gingiva, upper lip

exits via the foramen rotundum

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14
Q

V3 of CN V

A

mandibular

sensory and motor

innervates skin of mandibular prominence, mandible oral cavity, gingiva, teeth, inferior lip, meninges of middle cranial fossa

sensation from anterior 2/3 of tongue

motor to the pharyngeal arch 1 muscles

exits via the foramen ovale

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15
Q

Somatic motor muscles of V3 of CNV

A

muscles of mastication, tensor tympani, tensor veli palatini, mylohyoid, anterior belly of digastric

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16
Q

CN VII

A

facial nerve

innervation pharyngeal arch 2 structures

has sensory, somatic motor, and parasymp motor functions

leaves posterior cranial fossa via the internal acoustic meatus

17
Q

Somatic motor of CN VII

A

muscles of facial expression

innervates pharyngeal arch 2 muscles

exits via stylomastoid foramen

innervates stapedius, stylohyoid, posterior belly of digastric

18
Q

special sensory of CN VII

A

taste from the anterior 2/3 of the tongue

via the chorda tympani branch (post ganglionic parasymp)

19
Q

parasymp of CN VII

A

greater petrosal nerve

and nerve of pterygoid canal (postganglionic parasymp)

20
Q

CN VIII

A

vestibulochoclear

sensory only - hearing and equilibrium

exits posterior cranial fossa via internal acoustic meitus

21
Q

CN IX

A

glossopharyngeal

has sensory, somatic, parasymp function

exits via the jugular foramen

22
Q

CN IX general sensory

A

much of pharynx, palatine tonsil, carotid sinus, carotid body, middle ear

touch/taste from posterior 1/3 of the tongue

23
Q

CN IX somatic motor

A

stylopharyngeus

24
Q

CN IX parasymp

A

paratoid salivary gland

25
Q

CN X

A

vagus nerve

all three function

exits via jugular foramen

26
Q

Vagus nerve somatic motor

A

most pharynx and larnyx muscles

27
Q

vagus nerve parasymp

A

thoracic and most abdominal organs

28
Q

CN XI

A

accesory nerve

somatic motor to trapezius and SCM

exits via jugular foramen

29
Q

CN XII

A

hypoglossal

somatic motor to intrinsic muscles and extrinsic muscles of the tongue

exits via the hypoglossal canal

30
Q

cranial nerves leaving jugular foramen

A

CN IX, CN X, CN XI

31
Q

cranial nerves leaving superior orbital fissure

A

CN III, CN IV, CN VI, V(1) of V

HS Block 3 (6 decks)

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