CSD Cranial nerves

CN V

trigeminal

motor function of CN V

Innervates the masseter muscle (*jaw movement), the velar muscle, a middle ear muscle (to protect from loud sounds)

sensory function of CN V

the face from the optothalamic division (forehead, eyelids, nasal cavity), maxillary division(upper lip, cheek, nose, hard palate, upper teeth, jaw), mandibular division (mandible, lower lip and teeth, external auditory mandible).

are trigeminal motor fibers ipsilateral or contralateral or bilateral?

ipsilateral

CN VII

facial

sensory function of CN VII

anterior 2/3 of tongue

motor function of CN VII

facial expressions + auditory muscle to protect from loud sounds. upper facial muscles have bilateral innervation, and lower facial muscles are contralateral

CN VIII

vestibulocochlear nerve

function of CN VIII

sensory only for balance and hearing

CN IX

glossopharyngeal nerve

sensory function for CN IX

sensory info from upper pharynx and posterior 1/3 of tongue

motor function of IX

Stylopharyngeus muscle (a pharyngeal muscle), very important for swallowing, voice projection, and making high pitch noises.

autonomic function of IX

Parasympathetic fibers stimulate the parotid gland to produce saliva

autonomic function of VII

stimulates salivatory glands in mouth, helps for chewing and swallowing

CN X

vagus nerve

sensory function of X

lower pharynx, larynx, and trachea

motor function of X

innervate all muscles of the pharynx to produce our voice! also pharyngeal muscles (not stylopharyngeus) and velar muscles (not palatal tensor)

CN XII

hypoglossal nerve

function of CN XII

motor only; produces tongue movement, innervates all intrinsic and extrinsic muscles of the tongue