🧠 The Cranial Nerves
A complete, exam-ready study guide with mnemonics, clinical correlations, and interactive quizzes.
The 12 Cranial Nerves at a Glance
There are 12 pairs of cranial nerves, all arising from the brain or brainstem. Unlike spinal nerves, they do not follow a regular segmental pattern. The first and most important thing to memorise is their names and numbers — after that, the details fall into place.
The Golden Mnemonic — Learn the 12 Nerves in Order
“Oh Oh Oh, To Touch And Feel Very Good Velvet, AH!”
Olfactory, Optic, Oculomotor, Trochlear, Trigeminal, Abducens, Facial, Vestibulocochlear, Glossopharyngeal, Vagus, Accessory, Hypoglossal.
Quick Reference: Sensory, Motor, or Both?
Remember with: “Some Say Marry Money But My Brother Says Big Brains Matter More”
| Nerve | Name | Type | Key Skull Exit |
|---|---|---|---|
| I | Olfactory | Sensory (S) | Cribriform Plate |
| II | Optic | Sensory (S) | Optic Canal |
| III | Oculomotor | Motor (M) | Superior Orbital Fissure |
| IV | Trochlear | Motor (M) | Superior Orbital Fissure |
| V | Trigeminal | Both (B) | SOF / Rotundum / Ovale |
| VI | Abducens | Motor (M) | Superior Orbital Fissure |
| VII | Facial | Both (B) | Internal Acoustic Meatus |
| VIII | Vestibulocochlear | Sensory (S) | Internal Acoustic Meatus |
| IX | Glossopharyngeal | Both (B) | Jugular Foramen |
| X | Vagus | Both (B) | Jugular Foramen |
| XI | Accessory | Motor (M) | Jugular Foramen |
| XII | Hypoglossal | Motor (M) | Hypoglossal Canal |
You're reading the free preview.More detailed sections, comparisons, mnemonics and exam pearls continue below — for subscribers.