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18 Cards in this Set

  • Front
  • Back
CN I
Olfactory
Sensory (afferent)

Skull foramen - cribriform plate (bind to receptors on cilia; they reside within holes of cribriform plate, and this is where they originate)

Fiber - SA
Ganglion - olfactory mucosa receptor cells
Area - olfactory mucosa
CN II
Optic
Sensory (afferent)

Originate - retina to optic disc, where they form the optic nerve; the nerve courses through the orbit and through the optic canal to the optic chiasm then to the cerebral cortex
Skull foramen - optic canal

Fiber - SA
Ganglion - layer of retina
Area - Neural retine
CN III
Oculomotor
Motor (efferent)

Originates - leaves brainstem btwn cerebral peduncles
Skull foramen - superior orbital fissure

2 Fiber types
Fiber 1 - GSE
Ganglion - ...
Area - extrinsic eye muscles except SO, LR

Fiber 2 - GVE
Ganglion 2 - ciliary
Area - ciliary muscle (flattens lens, allows focusing = accomodation) + sphincter pupillae (constrics pupil)
CN IV
Trochlear
Motor (efferent)

Originate - pons-midbrain junction at dorsal aspect of brainstem (only CN to leave at dorsal brainstem); makes tight turn (like a pulley)
Skull foramen - superior orbital fissure

Fiber - GSE
Ganglion - ...
Area - superior oblique (inward rotation, downward)
CN V
Trigeminal
Motor (efferent) and Sensory (afferent)

Originate - midpons, then branches into 3 nerves

V1 (opthalmic)
Strictly sensory (afferent)
Skull foramen - superior orbital fissure
Fiber - GSA
Ganglion - Trigeminal
Area - Face (forehead, nasal bridge), cornea

V2 (maxillary)
Stricly sensory (afferent)
Skull foramen - foramen rotundum
Fiber - GSA
Ganglion - Trigeminal
Area - Face (cheeks), nasal cavity, upper teeth

V3 (mandibular)
Sensory (afferent) and Motor (efferent)
Skull foramen - foramen ovale
2 Fiber types - both ganglion = Trigeminal
Fiber 1 - VSE (Arch 1!)
Area - Muscles of mastication, tensor tympani and palati, anterior digastric, mylohyoid

Fiber 2 - GSA
Area - Face (mandible, temple), lower teeth, anterior 2/3 of tongue (only sensation, no taste)
CN VI
Abducens
Motor (efferent)

Originate - inferior to the pons (pontomedullary junction)
Skull foramen - superior orbital fissure

Fiber - GSE
Ganglion - ...
Area - Lateral rectus
CN VII
Facial
Motor (efferent) and Sensory (afferent)

Originates - bwn pons and pyramids

Facial
Skull foramen - internal acoustic meatus

Greater petrosal
Skull foramen - pterygoid canal
2 Fiber types
Fiber 1 - GVE
Ganglion 1 - pterygopalate
Area 2 - lacrimal gland (tears), nasal and palatine gland (mucous) - think crying

Fiber 2 - VA
Ganglion 2 - geniculate
Area 2 - taste from palate

Chorda tympani
Skull foramen - petrotympanic
2 Fiber types
Fiber 1 - GVE
Ganglion 1 - submandibular
Area 1 - sublingual and submandibular salivary glands

Fiber 2 - VA
Ganglion 2 - geniculate
Area 2 - taste of anterior 2/3 tongue


Terminal
Facial nerve continues in facial canal to stylomastoid foramen where it branches into terminal branches
Skull foramen - stylomastoid foramen
2 Fiber types
Fiber 1 - SVE
Ganglion 1 - ...
Area 1 - muscles of facial expression, stylohyoid, post. digastric

Fiber 2 - GSA
Ganglion 2 - geniculate
Area 2 - skin of external auditory meatus
CN VIII
Vestibulocochlear
Sensory (afferent)

Originate - inner ear
Skull foramen - internal acoustic meatus

2 Fiber types
Fiber 1 - SA
Ganglion 1 - Spiral
Area 1 - Organ of corti (sound)

Fiber 2 - SA
Ganglion 2 - Vestibual
Area 2 - semicircular canal, saccule, utricle
CN IX
Glossopharyngeal
Motor (efferent) and Sensory (afferent)

Originate - medulla very near CN X
Skull foramen - jugular foramen

5 Fiber types
Fiber 1 - GVE
Ganglion 1 - otic
Area 1 - parotid salivary gland

Fiber 2 - SVE (arch 2!)
Ganglion 2 - ...
Area 2 - Stylopharyngeal muscle

Fiber 3 - VA
Ganglion 3 - inferior
Area 3 - taste for poster 2/3 tongue

Fiber 4 - GSA
Ganglion 4 - inferior
Area 4 - external ear

Fiber 5 - VA or GSA
Ganglion 5 - inferior or superior
Area 5 - posterior 2/3 tongue, pharynx, soft palate, middle ear (all sensory)
CN X
Vagus
Motor (efferent) and Sensory (afferent)

Originates - from the brainstem, lateral to the olive (travels all over the place)
Skull foramen - jugular foramen

4 Fiber types
Fiber 1 - GVE
Ganglion 1 - terminal
Area 1 - thoracic, abdominal (GI) viscera to L colic flexure

Fiber 2 - SVE (arch 4, 6)
Ganglion - ...
Area 2 - skeletal muscle of larynx, pharynx, palatine, esophagus

Fiber 3 - VA
Ganglion 3 - inferior
Area 3 - sensory from all thoracic, abdominal viscera of GVE

Fiber 4 - VA
Ganglion 4 - inferior
Area 4 - taste of epiglottis
CN XI
Accessory
Motor (efferent)

Originates - some in medulla and some in cervical spinal cord; fibers go up through foramen magnum and leave through jugular foramen
Skull foramen - jugular foramen

Fiber - GSE or SVE
Ganglion - ...
Area - trapezius, sternocleidomastoid muscles
CN XII
Hypoglossal
Motor (efferent)

Originates - medulla
Skull foramen - hypoglossal canal

Fiber - GSE
Ganglion - ...
Area - intrinsic and extrinsic muscles of tongue
GSE - general somatic efferent
innervate skeletal muscle
3, 4, 6, 11, 12
GVE - general visceral efferent
parasympathetic
3, 7, 9, 10
SVE - special visceral efferent
innervate branchial arches
5, 7, 9, 10
GSA - general somatic afferent
pain, touch from muscle/joints
5, 7, 9, 10
GVA - general visceral afferent
pain, touch from visceral structures
taste
7, 9, 10
SA - special afferent
special senses
hearing, smell, sight (ears, nose, eyes)
1, 2, 8