Where are CNs 9, 10, 11, 12 located? What do they do and what is their name?
9- Glossopharyngeal, has 5 function. sensory for skin of external ear, sensory for taste of posterior 1/3 of tongue, information of carotid sinus/carotid body, innervation of parotid gland, motor to the stylopharyngeus muscle.
10- Vagus, supplies parasympathetic fibers to most organs of body, nothing after the 2nd segment of the transverse colon. some skeletal muscles like levator veli palatini and cricothyroid, others.
11- Accessory, innervates the sternocleidomastoid and trapezius muscles.
12- Hypoglossal, control of the tongue speech and food, swallowing,