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Crit Care Paramedicine > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

What is cranial nerve I?

A

Olfactory nerve

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2
Q

How do you test cranial nerve I?

A

Test sense of smell using familiar scents (e.g., coffee, vanilla).

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3
Q

Where is cranial nerve I located?

A

Located in the forebrain (cerebrum, anterior to midbrain).

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4
Q

What is cranial nerve II?

A

Optic nerve

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5
Q

How do you test cranial nerve II?

A

Test visual acuity (Snellen chart), visual fields, and pupillary light reflex.

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6
Q

Where is cranial nerve II located?

A

Located at the diencephalon, just anterior to the midbrain.

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7
Q

What is cranial nerve III?

A

Oculomotor nerve

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8
Q

How do you test cranial nerve III?

A

Test eye movements (up, down, medial), pupil constriction, and eyelid elevation.

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9
Q

Where is cranial nerve III located?

A

Located at the midbrain.

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10
Q

What is cranial nerve IV?

A

Trochlear nerve

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11
Q

How do you test cranial nerve IV?

A

Test downward and inward eye movement by asking the patient to look at their nose.

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12
Q

Where is cranial nerve IV located?

A

Located at the midbrain.

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13
Q

What is cranial nerve V?

A

Trigeminal nerve

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14
Q

How do you test cranial nerve V?

A

Test facial sensation (light touch, pinprick), and jaw strength (clench teeth).

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15
Q

Where is cranial nerve V located?

A

Located at the pons.

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16
Q

What is cranial nerve VI?

A

Abducens nerve

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17
Q

How do you test cranial nerve VI?

A

Test lateral eye movement by asking the patient to look sideways.

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18
Q

Where is cranial nerve VI located?

A

Located at the pons.

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19
Q

What is cranial nerve VII?

A

Facial nerve

20
Q

How do you test cranial nerve VII?

A

Test facial expressions (smile, frown, puff cheeks) and taste on anterior 2/3 of tongue.

21
Q

Where is cranial nerve VII located?

A

Located at the pons.

22
Q

What is cranial nerve VIII?

A

Vestibulocochlear nerve

23
Q

How do you test cranial nerve VIII?

A

Test hearing with tuning fork (Rinne/Weber tests) and balance (Romberg test).

24
Q

Where is cranial nerve VIII located?

A

Located at the pons-medulla junction.

25
Q

What is cranial nerve IX?

A

Glossopharyngeal nerve

26
Q

How do you test cranial nerve IX?

A

Test gag reflex, swallowing, and taste on posterior 1/3 of tongue.

27
Q

Where is cranial nerve IX located?

A

Located at the medulla.

28
Q

What is cranial nerve X?

A

Vagus nerve

29
Q

How do you test cranial nerve X?

A

Test swallowing, phonation (say ‘ahh’), and uvula elevation.

30
Q

Where is cranial nerve X located?

A

Located at the medulla.

31
Q

What is cranial nerve XI?

A

Accessory nerve

32
Q

How do you test cranial nerve XI?

A

Test shoulder shrug (trapezius) and head-turning strength (sternocleidomastoid).

33
Q

Where is cranial nerve XI located?

A

Located at the medulla.

34
Q

What is cranial nerve XII?

A

Hypoglossal nerve

35
Q

How do you test cranial nerve XII?

A

Test tongue movements by asking the patient to stick out their tongue.

36
Q

Where is cranial nerve XII located?

A

Located at the medulla.

37
Q

What cranial nerves are involved in the pupillary light reflex?

A

Cranial nerves II (optic) and III (oculomotor).

38
Q

How do you test the pupillary light reflex?

A

Shine a light into one eye and observe for pupillary constriction in both eyes.

39
Q

What cranial nerves are involved in the corneal reflex?

A

Cranial nerves V (trigeminal) and VII (facial).

40
Q

How do you test the corneal reflex?

A

Lightly touch the cornea with a cotton wisp and observe for blinking.

41
Q

What cranial nerves are involved in the oculocephalic reflex (doll’s eyes)?

A

Cranial nerves III (oculomotor), IV (trochlear), and VI (abducens).

42
Q

How do you test the oculocephalic reflex?

A

Turn the patient’s head side-to-side; eyes should move opposite to the head direction.

43
Q

What cranial nerves are involved in the cold caloric reflex?

A

Cranial nerves III (oculomotor), IV (trochlear), VI (abducens), and VIII (vestibulocochlear).

44
Q

How do you test the cold caloric reflex?

A

Instill cold water into the ear canal and observe for eye deviation toward the stimulated ear.

45
Q

What cranial nerves are involved in the gag reflex?

A

Cranial nerves IX (glossopharyngeal) and X (vagus).

46
Q

How do you test the gag reflex?

A

Stimulate the back of the throat and observe for gagging or uvula elevation.

Crit Care Paramedicine (3 decks)

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