Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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 |