Snapshot A 22-year-old man presents to his physician with facial drooping. He reports these symptoms began approximately 1 day prior to presentation. He denies any trauma to the face and past medical history is noncontributory. On physical examination, there is facial drooping of the right side of the face. The right nasolabial fold is absent and he is unable to close his right eye or raise the right side of his forehead. The rest of the neurologic exam is normal. Introduction Clinical definition login to view 1 more bullet Epidemiology login to view 4 more bullets Etiology login to view 7 more bullets Pathogenesis login to view 1 more bullet Prognosis login to view 1 more bullet Anatomy The facial nerve is a mixed nerve that arises from the pontomedullary junction and contains login to view 9 more bullets Presentation Symptoms and physical exam login to view 8 more bullets Peripheral (lower motor neuron) vs central (upper motor neuron) lesion login to view 4 more bullets Studies Diagnostic criteria login to view 1 more bullet Differential Stroke Multiple sclerosis Myasthenia gravis Guillain-Barre syndrome Treatment Medical login to view 3 more bullets Complications Ocular manifestations login to view 1 more bullet