Cranial nerves quiz: connect each nerve to its function
Remembering twelve names in order is a start. The next task is choosing the right nerve when a question describes a movement or sensation. Use the table as a reference, then cover it and attempt the five questions below.
The 12 cranial nerves and their main functions
“Sensory,” “motor,” and “mixed” below use the standard introductory grouping. This is a selected-function summary, not a complete list of fiber types, nuclei, or branches. Several motor and mixed nerves also carry parasympathetic fibers.
| Number | Nerve | Type | Selected function |
|---|---|---|---|
| I | Olfactory | Sensory | Smell |
| II | Optic | Sensory | Vision |
| III | Oculomotor | Motor | Most eye movements; eyelid elevation; pupil constriction |
| IV | Trochlear | Motor | Superior oblique muscle |
| V | Trigeminal | Mixed | Facial sensation and chewing |
| VI | Abducens | Motor | Lateral rectus muscle |
| VII | Facial | Mixed | Facial expression; taste from anterior two-thirds of tongue |
| VIII | Vestibulocochlear | Sensory | Hearing and balance |
| IX | Glossopharyngeal | Mixed | Posterior tongue taste; swallowing contributions |
| X | Vagus | Mixed | Swallowing and voice; parasympathetic supply to thoracoabdominal organs |
| XI | Accessory | Motor | Sternocleidomastoid and trapezius |
| XII | Hypoglossal | Motor | Tongue movement, except palatoglossus |
References: OpenStax: The Peripheral Nervous System and StatPearls: Cranial Nerve Testing.
Study the functions, not only the sequence
Work in both directions: nerve → function and function → nerve. If you can recite the list but cannot answer a function question, change the prompt rather than repeating the list faster.
- Compare neighbors: put two easily confused nerves on one page and write a distinction between them.
- Separate kinds of knowledge: keep number and name, function, skull exit, and brainstem relationship as different prompts.
- Use your syllabus: add nuclei, ganglia, reflexes, and lesion patterns only at the depth your course requires.
Five cranial nerve practice questions
Choose one answer before opening the explanation. Keep a note of which distinction you missed; the note is more useful than the score alone.
1. Which nerve supplies the lateral rectus muscle?
- Oculomotor (III)
- Abducens (VI)
- Trochlear (IV)
- Optic (II)
Show answer and explanation
B — Abducens (VI). The lateral rectus abducts the eye. Trochlear supplies superior oblique; oculomotor supplies most of the other extraocular muscles. See Clinical Methods: Cranial Nerves III, IV, and VI.
2. Which nerve combines facial sensation with motor supply to the muscles of mastication?
- Trigeminal (V)
- Facial (VII)
- Vagus (X)
- Hypoglossal (XII)
Show answer and explanation
A — Trigeminal (V). Distinguish chewing from facial expression. Facial expression is associated with VII, not the motor component of V.
3. Which cranial nerve carries information for hearing and balance?
- Glossopharyngeal (IX)
- Accessory (XI)
- Olfactory (I)
- Vestibulocochlear (VIII)
Show answer and explanation
D — Vestibulocochlear (VIII). Its name helps separate its vestibular and cochlear functions. Both belong to a sensory cranial nerve.
4. Taste from the anterior two-thirds of the tongue is principally carried by which cranial nerve?
- Hypoglossal (XII)
- Optic (II)
- Facial (VII)
- Accessory (XI)
Show answer and explanation
C — Facial (VII), through chorda tympani. Do not confuse taste with general sensation, which reaches this region through the lingual branch of V3. See Cranial Nerve Testing.
5. Which nerve provides motor supply to most tongue muscles?
- Trochlear (IV)
- Hypoglossal (XII)
- Vestibulocochlear (VIII)
- Trigeminal (V)
Show answer and explanation
B — Hypoglossal (XII). The important exception is palatoglossus, supplied through the vagus. Tongue movement and tongue taste are different questions.
What should you review next?
If you mixed up eye-movement nerves, make separate muscle-to-nerve prompts rather than a single “eye nerves” card. If tongue questions were difficult, give taste, general sensation, and movement their own prompts.
Return to this self-test on another study day without opening the table first. Then use the anatomy flashcard guide to turn each missed distinction into a concise question. For another nerve-network topic, continue with the brachial plexus quiz.
Sources and scope
This is an educational summary, not a neurological examination guide or medical advice. It has not undergone independent clinical review. Consult your course resources for full pathways, variations, and clinical interpretation.
- OpenStax Anatomy and Physiology 2e, section 13.4: The Peripheral Nervous System.
- StatPearls, NCBI Bookshelf: Cranial Nerve Testing.
- Clinical Methods, NCBI Bookshelf: Cranial Nerves III, IV, and VI.
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