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cranial nerves 12
cranial nerves function and assessment
Question | Answer |
---|---|
Olfactory Nerve I | Function: Familiar smell. Assessment: Patient can identify familiar smells. |
Optic Nerve II | Function: Peripheral vision, visual acuity. Assessment: Patient can see, peripheral vision intact. |
Oculomotor Nerve III | Function: Eyelid and eyeball movement; pupil size and reactivity. Assessment: Pupils react equally, able to move eyes together (accommodation). |
Trochlear Nerve IV | Function: Upward eye movement, can also turn eye downward and laterally. Assessment: Eye movement. |
Trigeminal Nerve V | Function: Face sensations, biting down, chewing. Assessment: Patient can sense facial touch, able to bite and chew. |
Abducens Nerve VI | Function: Turns eye laterally. Assessment: Eye movement. |
Facial Nerve VII | Function: Controls most facial expressions, taste of anterior tongue, frown, smile, and squint. Assessment: Close both eyes tightly, show the teeth, purse the lips. |
Acoustic Nerve VIII | Function: (AKA Vestibulocochlear) hearing and equilibrium, finger snaps. Assessment: Patient is able to touch examiners finger with his own. Patient can touch his nose with his eyes closed. |
Glossopharyngeal Nerve IX | Function: Tase, senses carotid blood pressure, taste of posterior tongue, and swallowing. Assessment: Intact gag reflex, and intact cough reflex. |
Vagus Nerve X | Function: Senses aortic blood pressure, slows heart rate, stimulates digestive organs, taste, and gag reflex. Assessment: When patient says "ah" the soft palate stays midline, intact gag reflex, and cough reflexes. |
Spinal Accessory Nerve XI | Function: Controls swallowing movements; shoulder shrug. Assessment: Patient can shrug shoulders without weakness. |
Hypoglossal Nerve XII | Function: Controls tongue movement. Assessment: Patient's tongue remains midline when he sticks out his tongue. |