2C + 2MB = 4P + 4MO

Cranial nerves. I found this "equation" that helps me to remember where the cranial nerves arise from:

2C + 2MB = 4P + 4MO

The 1st 2 cranial nerves [Olfactory (I) and Optic (II) nerves] originate in the Cerebrum, the next 2 [Oculomotor (III) and Trochlear (IV)] cranial nerves arise from the Midbrain, the next 4 [Trigeminal (V), Abducens (VI), Facial (VII) and Vestibulocochlear (VIII)] cranial nerves arise from the Pons and the last 4 [Glossopharyngeal (IX), Vagus (X), Accessory (XI) and Hypoglossal (XII)] cranial nerves arise from the Medulla Oblongata.







Source: Problem Based Neurosurgery by Sam Eljamel