A 59-year-old man presents with progressive weakness in the…

A 59-year-old man presents with progressive weakness in the hands and legs. He has muscle atrophy and fasciculations in the arms, hyperreflexia in the legs, and no sensory deficits. He was diagnosed with Amyotrophic Lateral Sclerosis (ALS). Which of the following best explains his pattern of paralysis?

A 45-year-old woman presents after being struck in the foreh…

A 45-year-old woman presents after being struck in the forehead with a heavy object. She has periorbital bruising (“raccoon eyes”) and clear fluid dripping from her nose that tests positive for glucose. Which calvarial fracture is most consistent with her presentation?

A 38-year-old woman presents with rapidly progressive ascend…

A 38-year-old woman presents with rapidly progressive ascending flaccid paralysis following a respiratory infection, which. Reflexes are absent. She is alert and cranial nerves are intact. She was subsequently diagnosed with Guillain-Barré syndrome. Which of the following is most consistent with her diagnosis?