There are 6 division in the brachial plexus: 3 anterior of the superior, middle, and inferior trunks as well as 3 posterior of the superior, middle, and inferior trunks.

The thoracodorsal nerve as well as the upper and lower subscapular nerves branch off of the posterior cord. This means the correct answer is the long thoracic nerve which branches off of the inferior trunk.

There are four cranial nerves that have both sensory and motor function. They are the trigeminal nerve, facial nerve, glossopharyngeal nerve, and vagus nerve. The glossopharyngeal nerve is responsible for general sensation, gustation, and baroreception. The motor fibers are used for swallowing. The trochlear nerve has only motor function (movement of the superior oblique), the oculomotor nerve has only motor functions (movement of the eye/pupil), the vestibulocochlear nerve has only sensory function (proprioception and audition).

The correct answer is the C5 root. The ulnar nerve is the most inferior nerve in the brachial plexus, meaning it would not arise from a root like C5 which is the most superior in the brachial plexus.

The correct answer is the trochlear nerve. This nerve has solely motor functions involving movement of the eye via the superior oblique muscle. The trigeminal nerve has both sensory and motor functions including general sensation of the face/scalp and opening/closing the mouth and modifying the tension of the tympanic membrane. Although both the oculomotor and abducens nerves play a role in eye movement, neither of them control the movement of the superior oblique muscle.

In this case, we are looking for a nerve with both sensory and motor function, laving only the facial and vagus nerves, as the hypoglossal and trochlear nerves are solely motor. Only the facial nerve controls the muscles in the face making it the correct answer. It also controls the tension of the ossicles.

The olfactory nerve is responsible for the sensation of smell (olfaction). The optic nerve senses visual stimuli, The vestibulocochlear nerve is a sensory nerve that is responsible for proprioception and audition, the accessory nerve (cranial nerve XI) is responsible for movement of the head and shoulders.

The accessory nerve innervates two large muscles: the sternocleidomastoid and the trapezius. Both of them are located in the neck/upper back which is the location of the accessory nerve. The trochlear nerve innervates the superior oblique.

The vestibulocochlear nerve is a sensory nerve that runs through the internal auditory canal of the ear. The ear is responsible for both our hearing and our sense of balance/equilibrium. This means that the vestibulocochlear nerve is responsible for both hearing and balance. The sense of vision of carried out by the optic nerve.

In this case, we are looking specifically for a nerve that has motor function. The correct answer is the hypoglossal nerve. The glossopharyngeal nerve is responsible for swallowing and gustation, but not for movement of the tongue. The facial nerve is responsible for moving the muscles of the face involved in facial expression and for controling the tension of the ossicles. The abducens is solely responsible for movement of the eye through its innervation of the lateral rectus.