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Cranial Nerves

QuestionAnswer
1. Olfactory Openings in cribiform plate. Detect smells. Sniff alcohol wipe.
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.
3. Oculomotor Adjacent to midbrain. Moves eyes up and down and laterally. Pupillary reaction. Ptosis, look up, down, medially.
4. Trochlear Moves eyes down and out.
5. Trigeminal 3 branches: opthalmic, maxillary, mandibular, origin adjacent to pons. Chewing, sensory for face, teeth, mouth and eyes.
6. Abducens Distributed to lateral rectus muscle of eyeball. Abducts eyes to ear. Most sensitive to ICP.
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.
8. Vestibulocochlear (acoustic) Adjacent to CN VII, semicircular canals and cochlea of ear. Hearing, equilibrium, audiometry, and balance. Romberg and hearing.
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.
10. Vagus Adjacent to medulla. Lifts palate, swallowing, coughing, voice production, test with glossopharyngeal. Aortic pressure, slows heart rate, stimulates digestive organs, taste.
11. Spinal Accesssory Muscles of trapezius, sternocleidomastoid, pharynx, larynx and soft palate. Shrug shoulders against resistance, swallow.
12. Hypoglossal Distributed to tongue muscles. Moves tongue, speech and swallowing.
CN I Olfactory: Openings in cribiform plate. Detect smells. Sniff alcohol wipe.
CN XII Hypoglossal: Distributed to tongue muscles. Moves tongue, speech and swallowing.
CN XI Spinal Accessory: Muscles of pharynx, larynx and soft palate. Shrug shoulders against resistance.
CN X Vagus: Adjacent to medulla. Lifts palate, swallowing, coughing, voice production, test with glossopharyngeal.
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.
CN VIII Vestibulocochlear: Adjacent to CN VII, semicircular cancals and cochlea of ear. Hearing, equilibrium, audiometry, and balance. Romberg and hearing.
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.
CN VI Abducens: Distributed to lateral rectus muscle of eyeball. Abducts eyes to ear. Most sensitive to ICP.
CN V Trigeminal: 3 branches: opthalmic, maxillary, mandibular, origin adjacent to pons. Chewing, sensory for face, teeth, mouth and eyes.
CN IV Trochlear: Moves eyes down and out.
CN III Occulomotor: Adjacent to midbrain. Moves eyes up and down. Pupillary reaction. Ptosis, look up, down, medially.
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.
Created by: DianaB
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