Cranial Nerve Innervation

drraythe's version from 2015-06-08 23:04


Question Answer
CN3, 4, 6Moves eyes, (CN3) Constricts pupils, Accommodates
CN5Chews and feels front of head
CN7Moves the face, tastes, salivates, cries
CN8Hears and regulates balance
CN9Tastes, salivates, swallows, monitors carotid body and sinus
CN10Tastes, swallows, lifts palate, talks, communicates to and from abdominal viscera
CN11Moves head (SCM), turns shoulders (Trapezius)
CN12Moves tongue

What passes through these foramens and fissures

Question Answer
Optic ForamenOptic Nerve
Optic ForamenOphthalmic Artery
Superior Orbital FissureCN3: Occulomotor Nerve
Superior Orbital FissureCN4: Trochlear Nerve (pulley))
Superior Orbital FissureCN6: Abducens Nerve
Superior Orbital FissureCN5-1 (Opthalmic Nerve),
Superior Orbital FissureOptic Vein
Inferior Orbital FissureMaxillary Nerve, CN5-2
Inferior Orbital FissureZygomatic Nerve (Branch of CN5-2)
Inferior Orbital FissureInfraorbital vessels
Stylomastoid ForamenMotor CN7
Carotid CanalInternal Carotid
Foramen Rotundem: Maxillary Nerve (CN5-2)
Question Answer
Foramen OvaleMandibular Nerve (CN5-3)
Foramen OvaleLesser petrosal nerve
Lesser Petrosal NerveBranch of CN5-3
Foramen SpinosumMiddle Meningeal Artery
Foramen SpinosumNervus Spinosus
Nervus Spinosus (goes)To Middle Cranial Fossa Dura
Hypoglossal CanalHypoglossal Nerve (CN12)
Foramen MagnumSpinal Cord
Foramen MagnumSpinal Accessory Nerve (Goes back up?
Foramen MagnumVertebral Artery
Internal Auditory MeatusFacial Nerve (CN7)
Internal Auditory MeatusVestibulocochlear Nerve
Jugular ForamenInternal Jugular Vein
Jugular ForamenGlossopharyngeal Nerve (CN9)
Jugular ForamenVagus Nerve (CN10)
Jugular ForamenSpinal Accessory Nerve

Ganglia in Head and Neck (old)

Question Answer
Otic GanglionInnervates Parotid Gland
Otic GanglionLesser Petrosal Nerve
Pterygopalatine GanglionInnervates Lacrimal gland, paranasal sinuses, nasal cavity and pharynx, gingiva, hard palate (CN5-2, CN7)
Pterygopalatine GanglionSalivation, Crying
Ciliary GanglionShort Ciliary Nerves--> Innervates Sphincter pupillae, ciliaris muscle (Presynaptic: EW nucles (GVE)
Submandibular GanglionInnervates Submandibular gland, sublingual gland
Geniculate GanglionTaste, From CN 7,9,10
Geniculate GanglionRight after Internal Auditory Meatus

Parasympathetic Ganglia in Neck

Question Answer
Ciliary Ganglion (CN Nucleus Root)Occulomotor Nerve
Ciliary Ganglion (Preganglionic Axon)Occulomotor Nerve
Ciliary Ganglion (Postganglionic Axon)Short Ciliary Nerves
Ciliary Ganglion Innervates?Ciliary muscle and sphincter pupillae
Pterygopalatine Ganglion (CN Nucleus Root)Facial Nerve (from geniculate ganglia)
Pterygopalatine Ganglion (Preganglionic Axon)Greater Petrosal Nerve
Pterygopalatine Ganglion Innervates?Lacrimal gland, paranasal sinuses, nasal cavity and pharynx, gingiva, hard palate
Otic Ganglion (CN Nucleus Root)Glossopharyngeal Nerve
Otic Ganglion (Preganglionic Axon)Lesser Petrosal Nerve
Otic Ganglion Innervates?Parotid gland
Submandibular Ganglion (CN Nucleus Root)Facial Nerve (from Salivatory Nucleus)
Submandibular Ganglion (Preganglionic Axon)Chorda Tympani
Submandibular Ganglion Innervates?Submandibular gland, sublingual gland

Foramen and Associated Nerves

Question Answer
Mandibular Foramen contains?Mandibular Nerve (foramen)
Tympanic Cavity contains?Facial Nerve (fibers from salivatory nucleus and nucleus solitarius) (foramen)
Tympanic Cavity fibers go toTo Submandibular Ganglion (from foramen)
Stylomastoid Foramen contains?Motor CN 7 (foramen)
Stylomastoid Foramen locationRight before Parotid Gland (foramen)
Pterygoid Canal fibers go toTo Pterygopalatine Ganglion (foramen)
Pterygoid Canal contains?Facial Nerve (from Greater petrosal nerve, fibers from salivatory nucleus and nucleus solitarius)

Innervation of Brainstem Motor Nuclei

Question Answer
Occulomotor innervates?Eye Muscles (Except for SO, LR)
Trochlear innervates?Superior Oblique
Abducens innervates?Lateral Rectus
E-W Nucleus innervates?Ciliary Muscle, Sphincter Pupillae
Salivatory Nucleus innervates?CN 7 and 9 to Lacrimal and Salivary Glands
Dorsal Motor Nucleus of Vagus innervates?Parasympathetic to GI, Heart, Lungs etc.
Trigeminal Motor Nucleus innervates?1st Pharyngeal Arch, Chewing Muscles
Facial Motor Nucleus innervates?2nd Pharyngeal Arch, Superficial Facial Muscles
Nucleus Ambiguus (via Glossopharyngeal Nerve) innervates?3rd Pharyngeal Arch, Stylopharyngeal Muscle
Nucleus Ambiguus (via Recurrent Laryngeal) innervates?4th Pharyngeal Arch, Vocal Cords

Important Nuclei of Brainstem (Sensory)

Question Answer
General Somatic SensoryTrigeminal Sensory Nucleus
General Visceral SensoryNucleus Solitarius (Afferent from Organs)
Special Somatic SensoryVestibular Nucleus
Special Somatic SensoryCochlear Nucleus
Special Visceral SensoryNucleus Solitarius (Taste)

Innervation of Brainstem Sensory Nuclei

Question Answer
Trigeminal Sensory NucleusSensory from Face
Trigeminal Sensory Nucleus (via CN9)Sensory from post 1/3 of tongue
Nucleus Solitarius (Vagus)Sensory from VIscera
Nucleus Solitarius (Glossopharyngeal Nerve)Carotid Sinus and Body
Nucleus Solitarius functionTaste
Vestibular NucleusCN8 Balance
Cochlear NucleusCN8 Hearing

Innervation of Tongue

Question Answer
Anterior 2/3rds TasteLingual Nerve from facial (Chorda Tympani) (Tongue)
Anterior 2/3rds SensoryMandibular Nerve (Lingual) (Tongue)
Tongue MotorHypoglossal Nerve (Tongue)
Posterior 1/3 TasteGlossopharyngeal Nerve (Tongue)
Posterior 1/3 SensoryGlossopharyngeal Nerve (Tongue)
Epiglottis SensoryInternal Branch of Superior Laryngeal Nerve (Vagus) (Tongue)
Epiglottis TasteInternal Branch of Superior Laryngeal Nerve (Vagus) (Tongue)
Epiglottis MotorPharyngeal Plexus (Tongue)
Only muscle of tongue not innervated by Hypoglossal nervePalatoglossus