Cranial nerves

Question 1

CN2 (4)

Answer 1

Snellen chart- viscual acuity

Lateral four quadrants- visual fields (finger commas)

Pupillary reflex
- Direct and indirect response

Red reflex

Question 2

CN3, 4, 6 (2)

Answer 2

Observation
- Eye position

Eye movements

• H shape
• Check double vision second time

Question 3

CN 5 (3)

Answer 3

Sensory
- Cotton wool touch comparing left and right

Motor

• Clench jaw
• Move jaw side to side

Question 4

CN 7 [5]

Answer 4

Observe facial symmetry

Motor

• Raise eyebrows
• Screw up eyes
• Puff out cheeks
• Smile + say eeeee

Question 5

UMN v LMN lesion for CN 7 observation

Answer 5

UMN lesion= no motor innervation in forehead

Question 6

CN 9 + 10

Answer 6

Patient opens mouth and says ahhh

- watch soft palate symmetrical rise using tongue depressor

Question 7

CN 11 [2]

Answer 7

Head turn left and right against my hand
- Sternocleidomastoid

Shrug shoulders against my hands
- Trapezius

Question 8

CN 12 [1]

- Observations [3]

Answer 8

Motor
- Stick tongue out, move side to side, then central

Observe

• Tongue wasting
• Fasciculation
• Deviation