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Cranial Nerves

Cranial Nerves. Label & Describe the Nerve Functions. CRANIAL NERVES NOTES 1-4. I . Olfactory Sensory from olfactory receptors in nasal cavity Smell tests II. Optic Thru optic canal into orbit Sensory from retina of eye Tests of vision III. Oculomotor Motor (mixed) to external eye

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Cranial Nerves

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  1. Cranial Nerves

  2. Label & Describe the Nerve Functions

  3. CRANIAL NERVES NOTES 1-4 • I. OlfactorySensory from olfactory • receptors in nasal cavity • Smell tests • II. Optic Thru optic canal into orbit • Sensory from retina of eye Tests of vision • III. OculomotorMotor (mixed) to external eye • muscle • adjustment and focusing of lens • Patient asked to track a finger, check papillary reflexes • IV. Trochlear Patient asked to track a finger down and • laterally

  4. CRANIAL NERVES 5- 7 • V. Trigeminal Mixed – sensory from face, • mouth, teeth • Motor to muscles of mastication • Clench jaw, use cotton swab to lightly touch • face for sensation • VI. AbducensMixed to external eye muscle Track finger movement laterally • VII. Facial Mixed to facial muscles, • Autonomic to glands of face including • salivary glands • Patient asked to use muscles of facial • expression, taste test

  5. CRANIAL NERVES 8-12 • VIII.VestibulocochlearSensory from hearing and • balance receptors TEST: Check hearing and balance • XI. GlossopharyngealMixed –motorto salivary gland, somatic motor to pharynx TEST Check gag reflex • X. Vagus- major parasympathetic nerve to thoracic and abdominal • viscera controlling “rest and repose” response TEST: Check swallowing reflex • XI. AccessoryMixed – mostly motor to muscles of neck and scalp • Turn head against resistance or shrug-STERNOCLEIDOMASTOID • XII. Hypoglossal Mixed – mostly motor to muscles of tongue for speech, swallowing • Patient tongue thrust should be straight

  6. Label & Describe the Nerve Functions

  7. DISTINGUISH DIFFERENT TYPES OF NERVES (SENSORY, MOTOR OR BOTH) • SOME • SAY • MARRY • MONEY • BUT • MY • BROTHER • SAYS • BIG • BRAINS • MATTER • MOST

  8. Label & Describe the Nerve Functions

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