Final answer:
Cranial nerves can be memorized using mnemonics like 'On Old Olympus' Towering Tops/A Finn And German Viewed Some Hops' for nerve order, and 'Some Say Marry Money But My Brother Says Brains Beauty Matter More' for nerve type. The sensory nerves are CNI, CNII, and CNVIII; motor nerves are CNIII, CNIV, CNVI, CNXI, and CNXII; and nerves with both functions are CNV, CNVII, CNIX, and CNX
Step-by-step explanation:
Memorizing the cranial nerves and their functional roles is a fundamental part of anatomy coursework. One popular mnemonic for the names of the 12 cranial nerves in order is: "On Old Olympus' Towering Tops/A Finn And German Viewed Some Hops," where each word's initial letter corresponds to the cranial nerves ordered from CNI to CNXII. To remember their type (motor, sensory, both), the mnemonic "Some Say Marry Money But My Brother Says Brains Beauty Matter More" matches each nerve's function, where 'Some' stands for 'sensory', 'Marry' for 'motor' and 'Matter' for 'motor and sensory'.
The olfactory (CNI), optic (CNII), and vestibulocochlear (CNVIII) nerves are purely sensory. The oculomotor (CNIII), trochlear (CNIV), and abducens (CNVI) nerves are strictly motor. The spinal accessory (CNXI) and hypoglossal (CNXII) nerves are also motor. The remaining nerves - trigeminal (CNV), facial (CNVII), glossopharyngeal (CNIX), and vagus (CNX) - have both sensory and motor functions.