A 55 year old male presents to his primary care physician wi…
A 55 year old male presents to his primary care physician with a complaint of fasciculations of his right calf and weakness. In gathering a history, he also notes that his pool game has been going downhill recently. He is not able to grip his pool cue well enough to break well. Physical exam reveals motor weakness in all extremities, as well as a positive Hoffmann’s sign on the right. What is the most likely diagnosis?