Cranial Nerves
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| 1. Olfactory | Openings in cribiform plate. Detect smells. Sniff alcohol wipe.
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| 2. Optic | In optic papilla, an extension of subarachnoid space. Sensory transmission of light and visual impulses from retina to occipital lobe. Visual acuity, light perception, and visual fields.
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| 3. Oculomotor | Adjacent to midbrain. Moves eyes up and down and laterally. Pupillary reaction. Ptosis, look up, down, medially.
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| 4. Trochlear | Moves eyes down and out.
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| 5. Trigeminal | 3 branches: opthalmic, maxillary, mandibular, origin adjacent to pons. Chewing, sensory for face, teeth, mouth and eyes.
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| 6. Abducens | Distributed to lateral rectus muscle of eyeball. Abducts eyes to ear. Most sensitive to ICP.
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| 7. Facial | 5 branches distributed to anterior 2/3 of tongue, facial, scalp and neck muscles, lacrimal and salivary glands. Facial expression, closes eyelids, secretion of tears, salivation. Have patient smile, raise eyebrows, close eyelids against resistance.
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| 8. Vestibulocochlear (acoustic) | Adjacent to CN VII, semicircular canals and cochlea of ear. Hearing, equilibrium, audiometry, and balance. Romberg and hearing.
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| 9. Glossopharyngeal | Posterior 1/3 of tongue, pharynx muscles, parotid gland. Salivation, swallowing, taste, speech, monitors carotid bodies and sinus. Have patient open up and say ah, check uvula rise and fall, and gag.
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| 10. Vagus | Adjacent to medulla. Lifts palate, swallowing, coughing, voice production, test with glossopharyngeal. Aortic pressure, slows heart rate, stimulates digestive organs, taste.
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| 11. Spinal Accesssory | Muscles of trapezius, sternocleidomastoid, pharynx, larynx and soft palate. Shrug shoulders against resistance, swallow.
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| 12. Hypoglossal | Distributed to tongue muscles. Moves tongue, speech and swallowing.
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| CN I | Olfactory:
Openings in cribiform plate. Detect smells. Sniff alcohol wipe.
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| CN XII | Hypoglossal:
Distributed to tongue muscles. Moves tongue, speech and swallowing.
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| CN XI | Spinal Accessory: Muscles of pharynx, larynx and soft palate. Shrug shoulders against resistance.
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| CN X | Vagus: Adjacent to medulla. Lifts palate, swallowing, coughing, voice production, test with glossopharyngeal.
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| CN IX | Glossopharyngeal: Posterior 1/3 f tongue, pharynx muscles, parotid gland. Salivation, swallowing, taste, speech, monitors carotid bodies and sinus. Have patient open up and say ah, check uvula rise and fall, and gag.
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| CN VIII | Vestibulocochlear: Adjacent to CN VII, semicircular cancals and cochlea of ear. Hearing, equilibrium, audiometry, and balance. Romberg and hearing.
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| CN VII | Facial: 5 branches distributed to anterior 2/3 of tongue, facial, scalp and neck muscles, lacrimal and salivary glands. Facial expression, closes eyelids, secretion of tears, salivation. Have patient smile, raise eyebrows, close eyelids tight.
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| CN VI | Abducens: Distributed to lateral rectus muscle of eyeball. Abducts eyes to ear. Most sensitive to ICP.
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| CN V | Trigeminal: 3 branches: opthalmic, maxillary, mandibular, origin adjacent to pons. Chewing, sensory for face, teeth, mouth and eyes.
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| CN IV | Trochlear: Moves eyes down and out.
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| CN III | Occulomotor: Adjacent to midbrain. Moves eyes up and down. Pupillary reaction. Ptosis, look up, down, medially.
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| CN II | Optic: In optic papilla, an extension of subarachnoid space. Sensory transmission of light and visual impulses from retina to occipital lobe. Visual acuity, light perception, and visual fields.
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Created by:
DianaB
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