BIO-201L TO- Activity 4
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BIO-201L TO: Activity 4
Directions
: For this assignment, you will assess the cranial nerve function of a partner, friend, or relative.
Record the results of each test in the second part of this document and then answer the questions at the
end. This is due by Sunday at 11:59 in Halo.
Cranial Nerve 1 (Olfactory)
Test each nostril separately for ability to smell and correct identification. Ask your partner to identify 3
substances, such as lemon juice, garlic, and vinegar.
Cranial Nerve 2 (Optic)
A: Search “vision chart for printing” and follow the instructions for that eye chart. Typically, you will tape
the printed chart to the wall and have your partner sit 10 feet away while reading each line.
B: To test peripheral vision, stand behind your partner. Have them close their right eye. Start with your
hand above and to the left of them (45° or diagonal). Bring your hand slowly towards the center of their
vision while wiggling your finger. Have your partner identify out loud when they see your wiggling
finger. Repeat for other 3 diagonals and repeat tests for the right eye. Due to the nose blocking medial
peripheral vision, the lateral peripherals should be visible more quickly as you move your hand in.
Cranial Nerve 3 (Occulomotor)
Test each eye separately for ability to move in certain directions. This test will also be used for CN 6.
Your partner will keep their head straight while following your pen with their eyes. About one foot away
from their face, hold your pen up and trace a large H with it. Hold the pen briefly at the sides to test for
nystagmus (eye twitching).
Cranial Nerve 4 (Trochlear)
Have your partner look at the tip of their nose.
Cranial Nerve 5 (Trigeminal)
A: With your partners eyes closed, test each of the 3 areas of trigeminal sensory innervation on each side
by gently touching a cotton ball to their skin
B: Palpate the temporalis muscles at the temples while your partner clenches their teeth several times.
Repeat while palpating the masseter muscles just above the angle of the mandible. Each pair of muscles
should contract equally. Then have your partner move their mandible side to side.
Cranial Nerve 6 (Abducens)
See cranial nerve 3.
Cranial Nerve 7 (Facial)
Observe your partner’s facial symmetry while they do the following: raise eyebrows, smile, frown, show
teeth, puff out cheeks, and close eyes tightly.
Cranial Nerve 8 (Vestibulocochlear)
A: Test each ear separately. While your partner blocks one ear with their finger, whisper a number near
their other ear and ask them to repeat it.
Cranial Nerves 9 (Glossopharyngeal) and 10 (Vagus)
A: This test will also be used for CN 10. Have your partner open their mouth. Observe the position of the
soft palate and uvula at rest and while saying “AH”. Both sides of the soft palate and uvular should rise
symmetrically.
Cranial Nerve 11
A: Test each side separately. Place your hand on your partners check and ask them to turn their head
against it while you resist. Simultaneously palpate contraction of the opposing sternocleidomastoid with
your other hand.
B: Place your hands on both of your partner’s shoulders and ask them to shrug while you press down.
Cranial Nerve 12
A: Ask your partner read this sentence out loud. Check for pronunciation of vowels and consonants.
B: Ask your partner to stick out their tongue and check for deviation.
Cranial Nerve 1
Odor
Right Nostril (Y/N)
Left Nostril (Y/N)
Identification (Y/N)
Vinegar
Y
Y
Y
Coffee
Y
Y
Y
Garlic
Y
Y
Y
Cranial Nerve 2
Smallest line number read – Right eye: ____9______ Left eye: ____6______
Peripheral vision:
Quadrant
Upper Right
Lower Right
Upper Left
Lower Left
Right eye
Y
Y
Y
Y
Left eye
Y
Y
Y
Y
Cranial Nerve 3
Nystagmus (Y/N) – Right eye: ___N_______ Left eye: ___N_______
Movement
Right Eye (Y/N)
Left Eye (Y/N)
Upper right
Y
Y
Lower right
Y
Y
Upper left
Y
Y
Lower left
Y
Y
Cranial Nerve 4
Can look at tip of nose (Y/N) – Right eye: ____Y______ Left eye: _____Y_____
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