Cranial Nerves

Question	Answer
What are the clinical implications of a damaged/paralyzed occulomotor n. (CN III)?	Lateral strabismus: inability to pull eyeball medially and dorsally (medial rectus, dorsal rectus muscles not functional) Ptosis: unable to innervate levator palpebrae superioris m. to lift upper eyelid
What types of fibers are present in the occulomotor n. and what do they innervate?	General Sensory Efferent: extrinsic muscles of the eyeball General Visceral Efferent: PS fibers to ocular smooth muscle
What types of fibers are present in the trochlear n. and what do they innervate? Consequences of Injury?	General Sensory Efferent: supply dorsal oblique muscle of the contralateral side Injury: dorsolateral strabismus (dorsal oblique m. non-functional; unable to rotate eye the opposite direction
What are the major branches of the Trigeminal n.?	Opthalmic, Maxillary, Mandibular nerves
What are the terminal branches of the Facial n.? What do they innervate?	Cervical branch: partidoauricularis m., ventral aspect of cutaneous trunci Auriculopalpebral nerve: orbicularis oculi , frontalis m., rostral auricular muscles
What nerves contribute to the pharyngeal plexus? What does the plexus supply?	Glossopharyngeal (CN IX), Vagus (CN X), Hypoglossal (CN XII) Supplies pharyngeal muscles (GSE), pharyngeal mucosa (GSA), glands of pharyngeal mucosa (GVE)

Resource summary

	Created by Megan Cobarruvias over 6 years ago