Which nerve would be assessed when checking the ability to chew and for sensory examination?

The trigeminal nerve is the correct choice because it is primarily responsible for sensations in the face and certain motor functions, including the ability to chew. This cranial nerve, also known as the fifth cranial nerve, has three major branches that provide sensory innervation to the forehead, cheek, and jaw. When assessing the ability to chew, the motor component of the trigeminal nerve, particularly its mandibular branch, is evaluated, as this branch controls the muscles involved in mastication.

In addition to its motor functions, the trigeminal nerve also carries sensory information from the face, which is critical for a comprehensive sensory examination. This dual role—both sensory and motor—makes the trigeminal nerve essential for understanding the functional integrity of facial sensation and chewing ability.

The other nerves listed do not serve the same functions. The olfactory nerve is primarily responsible for the sense of smell, while the facial nerve is involved in facial expressions and some taste sensations. The abducens nerve controls lateral eye movement and does not play a role in chewing or facial sensation. Therefore, the trigeminal nerve is specifically relevant to the questions of chewing and sensory examination of the face.