Barron's CCRN: Neurology questions with correct answers

Cranial nerves CORRECT ANSWER-All arise from the brain stem *except* I and II which arise from above the brain stem Cranial nerve I CORRECT ANSWER-*Olfactory* -Smell, often associated with a *basilar skull fracture* Cranial nerve II CORRECT ANSWER-*Optic* -Sight *NOT* pupil reaction Cranial nerve III CORRECT ANSWER-*Oculomotor* -Pupillary function -Flows out of the midbrain (in brain stem) and transverses transtentorial notch (so with an increase in ICP, PNS stimulation is blocked, SNS stimulation predominates= *pupil dilates on side of injury* Cranial nerve V CORRECT ANSWER-*Trigeminal* -Corneal reflex, chewing Cranial nerve VIII CORRECT ANSWER-*Vestibulocochlear* -Intactness of this nerve is tested with *Dolls eyes* and *cold caloric* exams Cranial nerve IX CORRECT ANSWER-*Glossopharyngeal* -Swallow, gag