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
motor to Somatic motor to stylopharyngeus muscle via what nerve
Glossopharyngeal
what nerve Visceral sensory to carotid body and sinus
Glossopharyngeal
Targets:
Somatic sensory to oropharynx, soft palate and posterior 1/3 of tongue
Special sensory to posterior 1/3 of tongue
Glossopharyngeal
Somatic sensory target: internal surface of tympanic membrane
tympanic nerve comes off Glossopharyngeal
parasympathetic to parotid gland
Glossopharyngeal: Tympanic
provides parasympathetic innervation to targets in thorax and abdomen.
vegus nerve
what 2 CN exit the jugular foramen
- vegus
2. Glossal pharangeal
Somatic motor to cricothyroid muscle
Somatic sensory to laryngeal mucosa superior to vocal folds
Vagus Superior Laryngeal Branch
How does spinal assessory nerve exit skill
jugular foramen
what nerve innervates SCM
spinal accessory
how does CN XII exit skull
Hypoglossal canal
what cranial nerve innervates: levator palprebre
CN: III oculomotor
what cranial nerve innervates: parasympathetic) • Ciliary muscle and sphincter pupillae muscle
CN: III oculomotor
what cranial nerve innervates: superior oblique
Trochlear
V1: opthalmic (sensory motor or both)
sensory only
V2: maxillary (sensory motor or both)
sensory only
V3: mandibular (sensory motor or both)
somatic motor and sensory
what cranial nerve is sensory to anterior 2/3 tongue
V3: mandibular
what nerve is the muscles of mastication
mandibular
3 branches of facial
- chorda tympani,
- branch to stapedius muscle
- greater petrosal
what is the exit path of facial nerve
o Internal acoustic meatus >via stylomastoid foramen
what is the mnemonic for muscles of stepedius
Brittany orgasms often on prom
Seans
penis
muscles of stepedius
stapedius, muscles of facial expression (buccinator, occipitofrontalis, orbicularis oris, orbicularis oculi, platysma), stylohoid m., posterior belly of digas
taste to the anterior 2/3 on tongue
Facial: Chorda tympani
what innervates submandibular and sublingual glands
Facial: Chorda tympani
Lacrimal gland (parasympathetic only) and mucosa of nasal cavity
Facial: greater petrosal
vestibulochclear
balance, hearing
what nerve gives off Tympanic nerve
Glossopharyngeal
what nerve innervated: stylopharyngeus muscle
Glossopharyngeal
what nerve innervated: Visceral sensory target: carotid body and sinus
Glossopharyngeal
innervates innervates internal tympanic membrane
Glossopharyngeal: tympanic nerve
innervates parotid gland
Glossopharyngeal: tympanic nerve
posterior 1/3 of tongue (taste)
Glossopharyngeal
