Diagnose vitamin D deficiency in a patient with multiple sclerosis. Diagnose mild cognitive impairment. Evaluate transient ischemic attack. Diagnose focal epilepsy. Diagnose chronic traumatic encephalopathy. Treat migraine in a patient with nonspecific MRI abnormalities. Diagnose temporal lobe epilepsy. Obtain CT without contrast in a patient with acute stroke. Diagnose myotonic dystrophy. Diagnose a subarachnoid hemorrhage with lumbar puncture. Treat primary progressive aphasia. Treat drug-induced tardive dyskinesia. Monitor patients for adverse effects of multiple sclerosis therapies. Treat with antiplatelet agents for secondary stroke prevention. Treat epilepsy in a woman taking oral contraceptives. Treat stroke with admission to the stroke unit. Treat generalized epilepsy. Diagnose normal pressure hydrocephalus. Diagnose carotid artery dissection. Diagnose oxcarbazepine-associated hyponatremia. Treat depression-related cognitive impairment. Treat migraine with typical aura. Treat essential tremor. Treat compressive spinal cord lesions due to plasmacytoma. Evaluate traumatic brain injury with CT of the head. Recognize adverse effects of cholinesterase inhibitors in a patient with Alzheimer disease. Treat blepharospasm with botulinum toxin in a patient with focal dystonia. Diagnose nonepileptic seizures. Treat urinary dysfunction in multiple sclerosis. Diagnose cognitive impairment due to cerebrovascular disease. Treat an older patient with seizures. Prophylactically treat asymptomatic extracranial carotid artery stenosis. Treat reversible cerebral vasoconstriction syndrome. Diagnose a primary central nervous system lymphoma. Treat ischemic stroke in a patient with atrial fibrillation. Treat a solitary metastatic brain tumor. Treat myasthenic crisis. Prevent cluster headache. Treat cognitive dysfunction in multiple sclerosis. Diagnose medication overuse headache. Treat a multiple sclerosis relapse. Manage hypertension in a patient with acute ischemic stroke. Evaluate facial nerve palsy with incomplete recovery after 3 months. Evaluate a first seizure in a patient at high risk of recurrent seizure. Treat migraine with aura. Diagnose medical complications after stroke. Diagnose multiple sclerosis in a patient with optic neuritis. Prevent worsening of traumatic brain injury. Treat generalized epilepsy in a woman of childbearing age. Diagnose a Parkinson-plus syndrome. Treat carpal tunnel syndrome. Treat hypertension after an intracerebral hemorrhage. Diagnose chronic inflammatory demyelinating polyradiculoneuropathy. Treat idiopathic intracranial hypertension. Monitor for atrial fibrillation in cryptogenic ischemic stroke. Treat advanced Parkinson disease with motor complications. Identify the cause of delirium in a patient with dementia. Treat multiple sclerosis–related spasticity. Treat refractory temporal lobe epilepsy. Treat parkinsonian-hyperpyrexia syndrome secondary to dopaminergic medication withdrawal. Treat status migrainosus. Modify pharmacologic therapy for multiple sclerosis in the setting of pregnancy. Prevent neurologic complications with nimodipine after subarachnoid hemorrhage. Provide preventive therapy in multiple sclerosis. Treat migraine without aura with an NSAID. Treat amyotrophic lateral sclerosis with riluzole. Diagnose a secondary headache. Counsel a patient with an unruptured cerebral aneurysm about smoking cessation. Diagnose early Parkinson disease. Treat a pseudorelapse of multiple sclerosis, differentiating it from an actual relapse. Select the appropriate diagnostic test to evaluate for complications after subarachnoid hemorrhage. Treat restless legs syndrome. Evaluate mild cognitive impairment. Diagnose an acute complication of thrombolytic therapy. Treat acute refractory migraine. Diagnose a posttraumatic epidural hematoma. Diagnose a tic disorder. Treat seizures in a patient with a brain tumor. Diagnose dementia with Lewy bodies. Diagnose trigeminal neuralgia. Adjust medication dosage in glucocorticoid-induced myopathy. Treat elevated blood pressure after recombinant tissue plasminogen activator therapy for stroke. Treat chronic migraine. Diagnose paraneoplastic limbic encephalitis. Diagnose delirium. Treat fatigue in multiple sclerosis. Treat statin-related toxic myopathy with a hydrophilic statin. Diagnose behavioral variant frontotemporal dementia. Diagnose Creutzfeldt-Jakob disease. Treat acute ischemic stroke with thrombolysis. Diagnose nonconvulsive status epilepticus with continuous electroencephalographic monitoring. Anticipate the potential adverse effects of medications used for symptomatic treatment of patients with multiple sclerosis. Diagnose small-fiber neuropathy associated with impaired glucose tolerance.