Motor: contracts medial rectus, superior rectus, inferior rectus, and inferior oblique muscles of the eye.
Parasympathetic: contracts intrinsic muscles of eye for near vision and pupil constriction
What does Nerve III do?
Sensory: touch from face/upper cranium
Motor: moves mandible (chewing; speech)
What does Nerve V do?
Sensory: taste(anterior 2/3 of tongue)
Motor: facial expression
Parasympathetic: salivary glands; lacrimal glands
What does Nerve VII do?
Sensory: taste (posterior 1/3 of tongue)
Parasympathetic: salivary glands.
What does Nerve IX do?
Sensory: taste; sensory from thoracic and abdominal organs
Motor: tongue and throat
Parasympathetic: decreases heart rate; increases digestion
What does Nerve X do?
Loss of hearing, and issues with sense of balance, vertigo.
What happens when you damage Vestibulocochlear (VIII)?
Sometimes "overactive", and affects the stomach, which causes the stomach to overproduce acid. This can lead to ulcers.
What happens when you damage Vagus (X)?
Shoulder drop, generally due to the fault in Trapezius.
What happens when you damage Accessory (XI)?
Tongue cannot stick out tongue straight when asked to stick it out.
What happens when you damage Hypoglossal (XII)?
Trigeminal Neuralgia (tic douloureux): When, for an unknown reason, the trigeminal nerve freaks out and causes intense, random excruciating.
What happens when you damage Trigeminal (V)?
Bell's palsy: Cannot smile on one half of the body, taste is altered, facial expression inactive on one side, eyes may also start to dry out. Generally goes away, but we don't really know what causes it.
What happens when you damage Facial Nerve (VII)?
Loss of vision out of one eye, if you cover up the non-damaged eye they can see nothing.
What happens when you damage Optic (II)?
Difficulty in moving at least one eye, droopy eyelids, abducted a little bit in general, since lateral rectus is still working. Also generally have pupil dilation.
What happens when you damage Oculomotor (III)?