Sensory: taste; sensory from thoracic and abdominal organs Motor: tongue and throat Parasympathetic: decreases heart rate; increases digestion
What does Nerve X do?
Motor: contract sternocleidomastoid and trapezius
What does Nerve XI do?
Motor: contracts extrinsic and intrinsic muscles of tongue
What does Nerve XII do?
Where does Vestibulocochlear (VIII) originate?
Loss of hearing, and issues with sense of balance, vertigo.
What happens when you damage Vestibulocochlear (VIII)?
Where does Glossopharyngeal (IX) originate?
Loss of "gag reflex"
What happens when you damage Glossopharyngeal (IX)?
Where does Vagus (X) originate?
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)?
Where does Accessory (XI) originate?
Shoulder drop, generally due to the fault in Trapezius.
What happens when you damage Accessory (XI)?
Where does Hypoglossal (XII) originate?
Tongue cannot stick out tongue straight when asked to stick it out.
What happens when you damage Hypoglossal (XII)?
Where does Trigeminal (V) originate?
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)?
Where does Abducens (VI) originate?
Eye cannot move to the side, or laterally.
What happens when you damage Abducens (VI)?
Where does Facial Nerve (VII) originate?
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)?
Where does Olfactory (I) originate?
Loss of the sense of smell.
What happens when you damage Olfactory (I)?
Where does Optic (II) originate?
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)?
Where does Oculomotor (III) originate?
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)?
Where does Trochlear (IV) originate?
Downward gaze of the eye, head will often be tilted simply to compensate for the weakness and the downward gaze. Find it rather tricky when going down stairs.