There are totally 12 cranial nerves. They are denoted in Roman numbers from I to XII. These are very easy to remember by just remembering a mnemonic.

Ooh, Ooh, Ooh, To Touch And Feel Very Good Velvet- Such Heaven!

These cranial nerves have different functions. They are mainly divided into sensory, motor, and both. By using the following mnemonic, the function of each cranial nerve can be remembered.

Some Say My Mother Bought My Brother Some Bad Beer, My, My.

Here S stands for sensory, M is for motor, and B is for both.

1. Olfactory: smell (sensory)
2. Optic: sight (sensory)
3. Oculomotor: moves eyes and pupils (motor)
4. Trochlear: moves eyes (motor)
5. Trigeminal: face sensation (both)
6. Abducens: moves eyes (motor)
7. Facial: moves face, salivate (both)
8. Vestibulocochlear: hearing, balance (sensory)
9. Glossopharangeal: taste, swallow (both)
10. Vagus: heart rate, digestion (both)
11. Accessory: moves head (motor)
12. Hypoglossal: moves tongue (motor)