Cranial Nerve Function and Test

What is the function of the Olfactory Nerve (CN I)?

• Vision

• Smell

• Hearing

• Taste

How is the Optic Nerve (CN II) tested?

• light test

• stick out tongue

• Snellen’s Chart

• Gag Reflex

What is the function of the Oculomotor Nerve (CN III)?

• Eye movement

• Hearing

• Tongue movement

• Shoulder & neck movement

How is the Trochlear Nerve (CN IV) tested?

• Snellen’s Chart

• gag reflex

• Follow a target as move it upward & downward

• light test

What is the function of the Trigeminal Nerve (CN V)?

• palpate muscle of mastication

• stick out tongue

• gag reflex

• follow a target as move it upward & downward

How is the Abducens Nerve (CN VI) tested?

• Identify different scent

• Light test

• Snellen’s Chart

• Follow a target as move it laterally.

What is the function of the Facial Nerve (CN VII)?

• Facial expression

• Eye movement

• Tongue movement

• Shoulder and neck movement

How is the Vestibulocochlear Nerve (CN VIII) tested?

• Stick out tongue

• Shrug shoulder

• Snellen’s Chart

• Rinne & Weber test

What is the function of the Glossopharyngeal Nerve (CN IX)?

• Smell

• Hearing & balance

• Taste, Swallowing

• Face sensation

How is the Vagus Nerve (CN X) tested?

• Light test

• Facial expression

• Follow a target as move it laterally

• Gag Reflex