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Anatomy > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

What are the cranial nerves?

A 
I Olfactory
II Optic
III Occulomotor
IV Trochlear
V Trigeminal
VI Abducens
VII Facial
VIII Vestibulocochlear 
IX Glossopharyngeal 
X Vagus
XI Spinal Accessory
XII Hypoglossal
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2
Q

Is I Olfactory motor or sensory?

A

sensory

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3
Q

What does II Optic do?

A

sensory only, vision, 50% of fibers on each side decussate

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4
Q

Is III Occulomotor motor or sensory?

A

Primarily motor

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5
Q

What is III Occulomotor responsible for?

A

visual tracking, fixation on objects, pupil adjustments and reflexes, elevation of eyelids

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6
Q

Is IV Trochlear motor or sensory?

A

motor

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7
Q

What does IV Trochlear do?

A

depresses, rotates, abducts the eye

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8
Q

Where does V Trigeminal originate from?

A

pons

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9
Q

is V Trigeminal motor or sensory?

A

both

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10
Q

What are the three branches of V Trigeminal?

A

Opthalmic (sensory) - sensation in the upper face
Maxillary (sensory) - sensation in frontal of face
Mandibular (sensory and motor) - sensation and motion in mandible

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11
Q

What is VI Abducens?

A

motor only, eyes

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12
Q

Where does VII Facial originate?

A

pons

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13
Q

What are the major responsibilities of VII Facial?

A

speech and facial expression, taste

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14
Q

How many branches are there in VII Facial?

A

tons and tons

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15
Q

What are the two of the four major divisions of VII Facial that we need to know?

A
  • Branchial motor - voluntary control of muscles of facial expression and the muscles of the neck
  • Special sensory - taste info from anterior 2/3 of tongue hard and soft palates
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16
Q

Is VIII Vestibulocochlear sensory or motor?

A

sensory only

17
Q

What are the two components of VIII?

A

vestibular and auditory branches

18
Q

Where does IX Glossopharyngeal start?

A

medulla

19
Q

Is IX Glossopharyngeal sensory or motor?

A

both

20
Q

What is the branch (out of 5) from glossopharyngeal that we need to know?

A

special sensory (taste sensation from posterior one-third of the tongue

21
Q

Where does X Vagus originate?

A

medulla

22
Q

What is the MAJOR branch of X Vagus that we need to know?

A

Branchial motor - voluntary control of pharynx, larynx, and palatoglossus muscles of the tongue

23
Q

What are the three major branches of the branchial motor branch of X Vagus?

A

Pharyngeal - taste and sensation in pharynx
Superior Laryngeal - innervates upper larynx (external and internal branches)
Recurrent Laryngeal - innervates all intrinsic laryngeal muscles except cricothyroid

24
Q

What are the two branches of the superior laryngeal branch of the branchial motor branch of X Vagus?

A

External - serves inferior constrictor muscle and cricothyroid muscle
Internal - sensory nerve for larynx

25
Q

is XI Spinal Accessory motor or sensory?

A

motor

26
Q

Where does XI Spinal Accessory originate?

A

medulla

27
Q

What are the two components of XI Spinal accessory?

A

Cranial root - motor innervation of pharynx and larynx (courses with X Vagus for this)
Spinal root - head turning

28
Q

Is XII Hypoglossal motor or sensory?

A

motor

29
Q

What does XII Hypoglossal do?

A

innervates all extrinsic tongue muscles except palatoglossus

30
Q

damage to X Vagus can have implications for what?

A

speech, swallowing, voicing

31
Q

If recurrent laryngeal branch of branchial motor branch of X Vagus is damaged, what might happen?

A

vocal fold paresis

Anatomy (8 decks)

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