Dry Lab Cranial Nerves Flashcards
What are the components of cranial nerve 3?
somatic motor and visceral motor
what is the innervation of CN 3 somatic motor?
extraoccular muscles (superior, medial, inferior rectus, inferior oblique) and levator palpebrae superioris
what is the innervation of CN 3 visceral motor?
intraoccular muscles, ciliary body, sphincter pupillae
where does CN 3 attach/originate?
mid brain at the superior colliculus level
where does the CN 3 go through?
supraorbital fissure
what are the general functions of CN 3?
eye movement and lens adjustment
what are the components of CN 5?
somatic motor for divison 3
somatic sensory for all divisions
what is the somatic motor innervation of CN 5?
division 3 to the temporalis, masseter, medial and lateral pterygoid, tensor veli palatini, tensor tympani, anterior digastric, and mylohyoid
what is the somatic sensory innervation of CN 5?
division 1: orbit, and 1/2 of anterior scalp and eye
division 2: maxillary
division 3: all of the other face, great auricular nerve for taste
where does CN 5 attach/originate?
medial, lateral pons
where does the CN 5 go through?
division 1: superior orbital fissure
division 2: foramen rotundum
division 3: foramen ovale
what are the components of CN 7?
somatic motor, somatic sensory, visceral motor, visceral sensory
what is the somatic motor innervation of CN 7?
facial muscles, digastric posterior belly and stylohyoid muscles
what is the somatic sensory innervation of CN 7?
external ear
what is the visceral motor innervation of CN 7?
forms synapse in the pterygopalatine ganglia to innervate the lacrimal and mucosal glands
forms synapse in the submandibular ganglia to innervate the submandibular and sublingual glands
what is the visceral sensory innervation of CN 7?
anterior 2/3 of the tongue for tatse
where does CN 7 attach/originate?
lateral pontomedullary junction
where does CN 7 go through?
internal acoustic meatus until it goes out of the sylomastoid foramen
what are the components of CN 9?
somatic motor, somatic sensory, visceral motor, and visceral sensory
what is the somatic motor innervation on CN 9?
stylopharyngeus muscles
what is the somatic sensory innervation of CN 9?
posterior 1/3 of tongue and external acoustic meatus
what is the visceral motor innervation of CN 9?
forms synapse in the otic ganglia to innervate the parotid gland
what is the visceral sensory innervation of CN 9?
posterior 1/3 of tongue for taste
carotid sinus for BP
carotid body for O2 level
where does CN 9 attach/originate?
posterior to the olive in the medulla oblongata
where does CN 9 go through?
jugular foramen
what are the components of CN 10?
somatic motor, somatic sensory, visceral motor, visceral sensory
what is the somatic motor innervation of CN 10?
levator veli palatini, uvula, pharynx, larynx, paletoglossus, styloglossus
what is the somatic sensory innervation of CN 10?
epiglottis and external ear
what is the visceral motor innervation of CN 10?
thoracic and abdominal cavity organs until the end of the midgut
what is the visceral sensory innervation of CN 10?
epiglottis, central posterior 1/3 of tongue for taste, thoracic and abdominal cavity organs until the end of the midgut
where does CN 10 attach/originate?
posterior olive
what does CN 10 go though?
jugular foramen
