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Brain > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

cranial nerve mnemonics

A

OOO To Touch And Feel Virgin Girls’ Vaginas And Hymens

I Olfactory
II Optic
III Olfactory
IV Trochlear
V Trigeminal (V1 Ophthalmic, V2 Maxillary, V3 Mandibular)
VI Abducens
VII Facial
VIII Vestibulocochlear
IX Glossopharyngeal
X Vagus
XI Spinal Accessory
XII Hypoglossal

Come Over Soon Soon Soon Ride On Some Intense Internal vaJJJ Ha!

cribiform plate, optic canal, superior orbital fissure, foramen rotundum, foramen ovale, internal acoustic meatus, jugular foramen, hypoglossal canal

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2
Q

Olfactory Nerve

A
  • special sensory
  • tested bilaterally

loss of fibers occurs with aging

blows to bridge of nose can shear filaments

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3
Q

Optic Nerve

A
  • special sensory

- test afferent limb of pupillary light reflex

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4
Q

Oculomotor Nerve

A
  • motor to extraocular muscles and levator palpebrae superioris
  • preganglionic parasympathetic fibers to ciliary ganglion

H test
test efferent limb of pupillary light reflex

  • aneurism in circle of Willis may put pressure on it
  • increased ICP compresses against petrous temporal region (parasympathetics affected first)
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5
Q

Trochlear Nerve

A

-motor to superior oblique

H test

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6
Q

Trigeminal Nerve (V1)

A
  • sensory from cornea, anterosuperior nasal cavity, frontal and ethmoid sinuses, dura, superior eyelid, bridge of nose, forehead, scalp
  • pterygopalatine postganglionic parasympathetics

-injured by trauma, tumor, aneurism, meningitis

test afferent limb of corneal reflex (spinal nucleus), forehead touch

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7
Q

Trigeminal Nerve (V2)

A
  • sensory from dura, posteroinferior nasal cavity, maxillary sinus, palate, maxillary teeth, inferior eyelid, anterior cheek and upper lip
  • postganglionic parasympathetic fibers to pterygopalatine
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8
Q

Trigeminal Nerve (V3)

A

auriculotemporal- sensory from typanic membrane, anterior 2/3 of tongue, floor of mouth, mandibular teeth, temporal region, external ear
-postganglionic parasympathetic to otic ganglion

-motor to muscles of mastication and tensor of soft palate

test jaw jerk (aff- mesencephalic nucleus, eff- motor nucleus)

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9
Q

Abducens Nerve

A

-motor to lateral rectus

H test

-stretches with increased ICP

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10
Q

Facial Nerve (motor branch)

A

-muscles of facial expression (facial nucleus), stapedius muscle of inner ear

test efferent limb of corneal reflex (ipsilateral for direct, contralateral for consensual), sound sensitivity

*facial nerve can be injured during delivery at its exit from the stylomastoid foramen due to absence of styloid and mastoid processes

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11
Q

Facial Nerve (greater petrosal)

A

preganglionic parasympathetic to pterygopalatine ganglion

*innervates lacrimal glands

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12
Q

Facial Nerve (chorda tympani)

A
  • taste in anterior 2/3 of tongue (solitary nucleus)
  • preganglionic parasympathetic fibers to submandibular ganglion (superior salivatory nucleus)

*can be affected in severe otitis media

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13
Q

Vestibulocochlear Nerve

A

-hearing and balance

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14
Q

Glossopharyngeal Nerve

A
  • sense from posterior 1/3 of tongue, nasopharynx, oropharynx, tympanic cavity and internal part of membrane, posterior soft palate, taste from posterior 1/3 of tongue (solitary nucleus), visceral sense from carotid body and sinus, uvula elevation (will deviate away from lesion)
  • preganglionic parasympathetics to otic ganglion to parotid gland (inferior salivatory nucleus)

test afferent limb of gag reflex (aff- solitary nucleus)
test carotid sinus (aff- solitary nucleus)

  • injured with CN X and XI from tumors in jugular foramen
  • lingual branch injured during tonsillectomy
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15
Q

Vagus Nerve (superior laryngeal)

A
  • sensory from larynx superior to vocal folds (internal branch)
  • motor to cricothyroid (external branch)
  • peristalsis (dorsal motor nucleus of vagus)
  • taste from epiglottis (solitary nucleus)
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16
Q

Vagus Nerve (Inferior laryngeal aka recurrent laryngeal)

A
  • sensory from vocal folds and below
  • motor to all intrinsic laryngeal muscles except cricothyroid

*hoarseness if deficit

17
Q

Vagus Nerve (other branches)

A
  • sensory from dura, auricle, external auditory meatus, laryngopharynx
  • visceral sensory from carotid body and sinus, thoracic and abdominal viscera
  • motor to pharynx, uvula, and elevator of soft palate (tested for palate symmetry by saying Ahh)

*efferent limb of gag reflex (nucleus ambiguous)
test carotid sinus (eff- dorsal motor nucleus)

18
Q

Spinal Accessory Nerve

A

-motor to trapezius and sternocleidomastoid

19
Q

Hypoglossal Nerve

A
  • motor to intrinsic (genioglossus) and 3/4 of extrinsic tongue muscles
  • protrude tongue

Brain (2 decks)

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