click below
click below
Normal Size Small Size show me how
Cranial Nerves
| Question | Answer |
|---|---|
| 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. |