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Anatomy > Week 5 Cranial Nerves > Flashcards

Week 5 Cranial Nerves Flashcards

1
Q

CN I

A

Olfactory

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2
Q

CN II

A

Optic

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3
Q

CN III

A

Occulomotor

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4
Q

CN IV

A

Troclear

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5
Q

CN V

A

Trigeminal

  • Opthalmic division
  • Maxillary division
  • Mandibular division
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6
Q

CN VI

A

Abducens

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7
Q

CN VII

A

Facial

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8
Q

CN VIII

A

Vestibulocochlear

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9
Q

CN IX

A

Glossopharyngeal

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10
Q

CN X

A

Vagus

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11
Q

CN 11

A

Accessory (spinal)

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12
Q

CN 12

A

Hypoglossal

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13
Q

Cribiriform plate CN

A

Olfactory (CN 1)

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14
Q

Optic canal CN

A

Optic (CN II)

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15
Q

Superior orbital fissure CN

A

Occulomotor (CN III)
Troclear (CN IV)
Opthalmic Division of Trigeminal (CN V(VI))
Abducens (CN VI)

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16
Q

Foramen rotundum CN

A

Maxillary Division of Trigeminal (CN V(V3))

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17
Q

Foramen ovale CN

A

Mandibular Division of Trigeminal (CN V(V2))

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18
Q

Internal acoustic meatus CN

A

Facial (CN VII)

Vestibulocochlear (CN VIII)

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19
Q

Jugular foramen CN

A

Glossopharyngeal (CN IX)
Vagus (CN X)
Accessory (CN XI)

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20
Q

Hypoglossal canal

A

Hypoglossal (CN XII)

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21
Q

Preganglionic parasympathetics are caried by these 4 cranial nerves

A

III
VII
IX
X

22
Q

All postganglionic fibers ‘piggy back’ on

A

A branch of the trigeminal to arrive at the structure that they innervate

23
Q

Preganglionic parasympathetic fibers arise from

A

Nuclei in the brain stem and synapse at 4 ganglia in the head

24
Q

Preganglionic parasympathetic fibers synapse at

A

4 ganglia in the head

  • ciliary
  • pterygopalantine
  • otic
  • submandibular
25
Q

4 ganglia in the head where preganglionic parasympathetic fibers synapse

A

Cilliary
Pterygopalatine
Otic
Submandibular

26
Q

Olfactory Nerve

A

CN I
Special sensory
Sensation of olfaction or smell

27
Q

Optic Nerve

A

CN II
Special sensory
To convey visual information from the retina

28
Q

3 Nerves to Ocular Muscles

A

III - Oculomotor
IV - Trigeminal
VI - Abducens

29
Q

12 Cranial Nerves in order

A 
Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Vestibulocochlear
Glosspharyngeal
Vagus
Accessory
Hypoglossal
30
Q

12 Cranial Nerves dirty mnemonic

A 
oh
oh
oh
to
touch
and
feel
virgin 
girls 
vagina
and
hymens
31
Q

12 Cranial Nerve sensory/motor mnemonic

A 
Some
Say
Marry
Money
But
My 
Brother
Says
Big 
Breasts
Matter
Most
32
Q

Oculocmotor Nerve

A

CN III
Somatic motor - supplies four extrinisc eye muscles (superior, medial and inferior rectus, and inferior oblique) that move eyeball. Supplies levator palpebrae superioris muscle to elevate eyelid.
visceral motor - constricts pupils (sphincter pupillae) and ciliary muscles to make lens of eye more spherical (as needed for near vision)
Nerve damage:
Ptosis (eyelid droop), paralysis of eye muscles leading to strabismus (eyes not in parallel/deviated improperly), diplopia (double vision)

33
Q

Efferent =

A

Motor

34
Q

Trochlear Nerve

A

CN IV - means pulley
Somatic motor - supply the superior oblique muscle of the eye
Very thin, with injury can easily be torn
Damage leads to paralysis of superior oblique leading to strabismus and diplopia

35
Q

Strabismus

A

Eyes not in parallel, deviated improperly

36
Q

Diplopia

A

Double vision

37
Q

Abducens Nerve

A

CN VI
Innervates the lateral rectus eye muscle for eye abduction (which abducts the eye) = pulls away laterally
Damage results in paralysis of lateral rectus limits lateral movement of eye, diplopia

38
Q

Trigeminal Nerve

A

CN V
Branchial motor - special visceral efferent - mastication, tensor tympani, tensor palantini, mylohyoid and anterior belly of digastric
General sensory - from face and scalp as far as the top of the head, conjunctiva, bulb of the eye, teeth, tongue, typmpanic membrane

39
Q

3 Trigeminal Branches

A

CN V1 Ophthalmic nerve
CN V2 Maxillary nerve
CN V3 Mandibular nerve

40
Q

Ophthalmic Nerve

A

CN V1
Somatic sensory: Forehead, top of scalp, eyelid, top of nose
Lacrimal nerve piggybacks

41
Q

Maxillary Nerve

A

CN V2
Somatic sensory: Maxillary, sides of nose, upper lip
Zygomatic nerve piggybacks

42
Q

Mandibular Nerve

A

CN V3
Somatic sensory: Sides of face near ear, mandible
General sensation to anterior 2/3 of tongue
Auriculotemporal nerve and Lingual nerve piggybacks

43
Q

Anterior 2/3 of tongue

A

General sense CN V3 (Trigeminal Nerve, Madibulary part)

Special sense from facial nerve

44
Q

Posterior 1/3 of tongue

A

Special sense and general both glossopharyngeal

45
Q

Facial Nerve

A 
Branchial motor (special visceral efferent) - supply the stapedius, stylohyoid, posterior belly of digastric muscles
General sensory - sensory to ear
46
Q

Vestibulocochlear Nerve

A

CN VIII
Conducts equilibrium and auditory sensations to brain
Cochlear branch conducts impulses for hearing, vestibular branch conducts impulses for equilibrium
Damage - loss of balance, vomiting and dizziness, deafness

47
Q

Glossopharyngeal Nerve

A

CN IV
Most components in a nerve that doesn’t go many places. At back of pharynx
Branchial motor - supplies stylopharyngeus
Visceral motor-carries sensation from carotid body and from carotid sinus (sense blood gas and bp)
Posterior 1/3 of the tongue general and special sensory

48
Q

Vagus Nerve

A

CN X - The Wanderer
Branchial motor - pharynx and larynx
Visceral motor - thorax and abdominal

49
Q

Accessory Nerve

A 
CN XI (aka Spinal Accessory)
Somatic motor function - innervates trapezius and sternocleidomastoid
50
Q

Hypoglossal Nerve

A

CN XII
Innervates intrinsic and extrinsic tongue muscles
Damage swallowing and speech difficulties due to impaired tongue movement, if only one, deviates to one side of damaged nerve

Anatomy (9 decks)

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