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58 Cards in this Set
- Front
- Back
What are the 7 modalities of the cranial nerve
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GSA
GVA GSE GVE SSA SVA SVE |
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GSA
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General Somatic Afferents
Includes pain, temp, touch, pressure from skin, muscles, joints Cell bodies originate in DRG Includes: CN V: 1-Sensation from forehead, eyelids, eyes 2- Sensation from mid-face 3- Sensation from lower face and muscles of mastication, TMJ CN VII: Sensations from External auditory canal and Facial muscles CN IX: Sensations from External audiitory canal, medial Tympanic Membrane and Posterior Tongue CN X: Sensations from External auditory canal, pharynx, larynx, trachea |
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GVA
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General Visceral Afferents
sensations from the viscera that you are not aware of Cell bodies originate in DRG Includes: CN VII: Sensations from Eustachian Tube CN IX: Sensations from chemoreceptors and baroreceptors in Carotid Body CN X: Sensations from chemoreceptors and baroreceptors in Aortic Sinus |
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GSE
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General Somatic Efferents
voluntary motor innervation to skeletal muscles derived from cranial somites Cell bodies originate in ventral horn CN III: Motor to extraocular eye muscle CN IV: Motor to extraocular eye muscle CN VI: Motor to extraocular eye muscle CN XI: Motor to sternocleidomastoid and trapezius CN XII: Motor to intrinsic and extrinsic muscles of the tongue (except palatoglossus) |
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GVE
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General Visceral Efferents
involuntary parasympathetic innervation to viscera Includes: CN III: Pupil Constriction (Ciliary Ganglion) CN VII: Lacrimal gland (Pterygopalatine Ganglion) and Submandibular gland (Submandibular Ganglion) CN IX: Parotid salivary gland (Otic Ganglion) CN X: Abdominocardiothoracic viscera (Unnamed Ganglion) |
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SSA
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Special Somatic Afferents
special body sensations that you are aware of CN II: Sense of Vision CN VIII: Sense of Hearing and Balance |
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SVA
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Special Visceral Afferents
visceral sensations that you ARE aware of CN I: Smell CN VII: Taste to Anterior 2/3 of Tongue CN IX: Taste to Posterior 2/3 of Tongue CN X: Taste to epiglottis |
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SVE
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Special Visceral Efferents
Motor innervation to straited muscles of pharyngeal arches CN V: Motor to muscles of mastication CN VII: Motor to muscles of facial expression CN IX: Motor to stylopharyngeus muscle CN X: Motor to pharyngeal, external laryngeal and esopohgeal muscle CN XI: Motor to soft palate and intrinsic muscles of larynx |
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CN I
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Olfactory Nerve
SVA Originates in Telencephalon (not brainstem) Only nerve that bypasses thalamus Only has 2 neurons on ascending sensory pathway (instead of 3) |
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CN II
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Optic Nerve
SSA Originates in Diencephalon (not brainstem) |
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Which CN are the only ones that don't originate in brainstem
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CN I originates in Telencephalon
CN II originates in Diencephalon |
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What is the only CN that bypasses the thalamus
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CN I
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What is the only CN that has 2 neurons in ascending sensory pathway
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CN I
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CN III
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Oculomotor Nerve
Originates in Midbrain GSE: Motor to: Medial Rectus Inferior Rectus Superior Rectus Inferior Oblique Levator Palpebrae Superioris GVE (Ciliary Ganglion) Parasympathetic to: Sphincter pupillae Ciliary Muscle |
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CN IV
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Trochlear N
Originates in Midbrain GSE Motor to: Superior Oblique Only CN to have LMN decussation Only motor nerve that exists brainstem dorsally |
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What CN has LMN decussation
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CN IV
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What CN exists brainstem dorsally
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CN IV
Exits dorsal surface of Midbrain then wraps around to ventral surface |
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CN V
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Trigeminal N
Originates in Pons GSA Sensory from Head and Neck 1- Upper eyelids to scalp 2- Lower eyelids to Upper lip 3- Lower lip to mandible, muscles of mastication, TMJ SVE Motor to muscles of mastication Temporalis Masseter Medial/Lateral Pterygoid Tensor Tympani Tensor Veli Palatini Anterior Digastric Mylohyoid |
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CN VI
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Abducent N
Originates in Pons GSE Motor to Lateral Rectus |
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CN VII
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Facial N
Originates in Pons GSA Sensations from muscles of facial expression Tympanic membrane External acoutic meatus Skin behind pinna GVA Sensory from Eustachian Tube SVA Taste from Anterior 2/3 of Tongue SVE Motor to Muscles of Facial Expression Stapedius Posterior Digastric Stylohyoid GVE Parasympathetics to: Lacrimal gland (Pterygopalatine Ganglion) Submandibular gland (Submandibular Ganglion) |
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CN VIII
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Vestibulocochlear N
Originates in Pons Nuclei is most dorsally located in Alar Plate SSA Sensations of Hearing and Balance |
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CN IX
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Glossopharyngeal N
Originates in Medulla GSA Sensation from Posterior 1/3 of Tongue, Oropharynx GVA Sensation from Carotid Bodies SVA Taste from Posterior 1/3 of Tongue SVE Motor to Stylopharyngeus GVE Parasympathetics to: Parotid gland (Otic Ganglion) |
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CN X
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Vagus
Originates in Medulla GSA Sensation from external auditory canal, pharynx, larynx GVA Sensations from Aortic Bodies SVA Taste from Epiglottis SVE Motor to: Pharyngeal M External Laryngeal M Esophageal M GVE Parasympathetics to: Abdominocardiothoracic viscera (Unnamed Ganglion) |
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CN XI
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Accessory N
Originates in Medulla GSE (Spinal Portion) Motor to Stenocleidomastoid and Trapzius SVE Motor to soft palate Intrinsic muscles of larynx |
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CN XII
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Hypoglossal N
Originates in Medulla GSE Motor to: Intrinsic and Extrinsic muscles of tongue (except palatoglossus Nuclei is most ventrally located in Basal Plate |
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Route of CN I
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-olfactory trigone
-olfactory tract -anterior fossa -olfactory bulbs -perforations in Cribiform Plate -nasal cavity |
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Route of CN II
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-lateral geniculate body
-R&L optic tracts -fibers cross at optic chiasma -R&L optic nerves -Optic Foramen -orbit |
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Route of CN III
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-interpeduncular fossa
-lateral cavernous sinus -Superior Orbital Fissure -orbit |
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Route of CN IV
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-dorsal surface of Medulla
-wraps around underneath -runs anteriorly -cavernous sinus -Superior Orbital Fissure -orbit |
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Route of CN V
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V1 Ophthalmic:
cave -lateral cavernous sinus -Superior Orbital Fissure -orbit V2 Maxillary: cave -lateral cavernous sinus -Foramen Rotundum -pterygopalatine fossa V3 Mandibular: cave -Foramen Ovale -infratemporal fossa |
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Route of CN VI
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Clivus
-petrous temporal ridge -cavernous sinus -Superior Orbital Fissure |
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Route of CN VII
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Internal Auditory Meatus
-petrous temporal bone -facial canal -Stylomastoid Foramen |
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Route of CN VIII
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Internal Auditory Meatus
-petrous temporal bone -cochlea & semicircular canals |
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Route of CN IX
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behind Olive
-Jugular Foramen |
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Route of CN X
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behind Olive
-Jugular Foramen |
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Route of CN XI
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Cranial portion:
-behind Olive, below Vagus fibers -joins spinal portion -split off to join Vagus -Jugular Foramen Spinal portion: -spinal cord segments C1-C5 -ascends to join the cranial portion -Jugular Foramen |
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Route of CN XII
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-between Olive & Pyramid
-Hypoglossal Canal |
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Edinger-Westphal nucleus
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GVE
Parasympathetic Nucleus of CN III Located in Midbrain Connected to Ciliary Ganglion |
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Ciliary Ganglion
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GVE
Parasympathetic Ganglion of CN III Connects to Edinger-Westphal nucleus Motor to Ciliary Muscles |
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Chief Sensory Nucleus of V
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GSA
Nucleus found in pons Connects to VPM of thalamus |
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Geniculate Ganglion
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GSA
CN VII Connects to Trigeminal Sensory Nucleus for touch Connects to Trigeminal Spinal Nucleus for pain and temp GVA Connects to Nucleus Solitarius |
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Trigeminal Spinal Nucleus
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CN VII
GSA Sensory of pain and temp Connects to VPM of thalamus |
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Nucleus Solitarius
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GVA and SVA
Connected to Glossopharyngeal Inferior ganglion, Vagus Inferior Ganglion, Geniculate Ganglion Synapses in VPM of thalamus |
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Superior Salivatory Nucleus
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GVE
Parasympathetic of CN VII Connects to Pterygopalatine Ganglion and Submandibular Ganglion |
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Pterygopalatine Ganglion
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Parasympathetic of CN VII
Connected to Superior Salivatory Nucleus Motor to Lacrimal gland |
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Submandibular Ganglion
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Parasympathetic of CN VII
Connected to Superior Salivatory Nucleus Motor to Submandibular glands |
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Inferior salivatory nucleus
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GVE
Parasympathetic of CN IX Connects to Otic Ganglion |
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Otic Ganglion
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GVE
Parasympathetic of CN IX Connects to Inferior salivatory nucleus Motor to Parotid Gland |
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Nucleus ambiguus
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SVE
CN IX, X, XI Motor to branchiometric muscles |
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dorsal motor nucleus of Vagus
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GVE
Parasympathetic of CN X Connects to Unnamed ganglia of abdominal viscera |
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Mesencephalic nucleus
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GSA
Proprioceptive nucleus of CN V3 Connects to Trigeminal Sensory Nucleus |
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Trigeminal Ganglion
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GSA
Receives sensory for CN V and projects to Trigeminal Sensory Nucleus in brainstem |
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Superior colliculus
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role in visual system for reflexes
superior colliculus goes to spinal to help make adjustments in motor system to compensate for changes in head position and what eyes see cord |
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Inferior colliculus
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part of the auditory system
Helps make adjustments in motor system to move to compensate for what is heard |
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Short Ciliary Nerve
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CN III GVE
Comes from Ciliary Ganglion Innervates pupil constriction and less accomodation |
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Chorda Tympani Nerve
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CN VII GVE
Comes from Submandibular Ganglion Innervates Submandibular and Sublingual Salivary glands Also carries SVA from anterior 2/3 of Tongue |
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Greater Petrosal Nerve
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CN VII GVE
Comes from Pterygopalatine Ganglion Innervates Lacrimal Gland Also carries SVA from soft palate |
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Lesser Petrosal Nerve
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CN IX GVE
Comes from Otic Ganglion Innervates Parotid Gland |