Final answer:
The mnemonic 'Some Say Marry Money But My Brother Says Brains Beauty Matter More' helps remember the function of each cranial nerve, specifying whether they are sensory, motor, or both. The first, second, and eighth cranial nerves are sensory, while the third, fourth, sixth, eleventh, and twelfth are motor, and the fifth, seventh, ninth, and tenth are both sensory and motor.
Step-by-step explanation:
To remember if the cranial nerves are sensory, motor, or both, a helpful mnemonic is "Some Say Marry Money But My Brother Says Brains Beauty Matter More". This corresponds to the basic function of each cranial nerve. The first, second, and eighth nerves, which are the olfactory, optic, and vestibulocochlear nerves respectively, are purely sensory.
The oculomotor, trochlear, and abducens nerves, which are the third, fourth, and sixth cranial nerves, are all motor. The spinal accessory and hypoglossal nerves, which are the eleventh and twelfth, are also strictly motor. The trigeminal, facial, glossopharyngeal, and vagus nerves, being the fifth, seventh, ninth, and tenth, contain both sensory and motor fibers and perform functions related to both sensations and muscle movements.