Cranial Nerves Flashcards
Most cranial nerves emerge from where
brain stem
what cranial nerve exits Cribriform foramina
olfactory
what is the target for CN II
retina
How does CN II exit the skull
optic canal
fiber type of CN III
somatic motor
parasympathetic
CN III exit
superior orbital fissure
CNIII parasympathetic portion
Ciliary muscle, Sphincter pupillae m.
CN III somatic motor targets
levator palpebrae superioris m.
superior, medial, and inferior rectus, inferior oblique
CN IV exit
superior orbital fissure
CN IV motor innervation
superior oblique
3 divisions of trigeminal nerve
Ophthalmic Division (CN V1)
Maxillary Division (CN V2)
Mandibular Division (CN V3)
opthalmic division exits the skull how
superior orbital fissure
maxillary exits skull how
foreman rotundum
mandibular division exits skull how
foramen ovale
muscles of mastication (temporalis, masseter, lateral & medial pterygoids), mylohyoid, anterior belly of digastric m, tensor veli palatini and tensor tympani mm.
somatic motor targets of mandibular division of trigeminal nerve
CN VI exits skill
superior orbital fissure
CN VI motor to what muscle
lateral rectus
CN VII exits skull
Stylomastoid foramen
stapedius, muscles of facial expression (buccinator, occipitofrontalis, orbicularis oris, orbicularis oculi, platysma), stylohoid m., posterior belly of digastric
motor of facial nerve
chorda tympani special sensory and parasympathetic
Special sensory target: anterior 2/3rds of tongue (taste)
Parasympathetic target: submandibular and sublingual glands
what nerve exits the skill via the Internal acoustic meatus
vestibulochoclealer