Seizure Disorders USMLE Step 1 Practice Question

A 62-year-old woman with a 10-year history of hypertension presents to the emergency department following a seizure episode. She reports that while sitting at dinner, she experienced involuntary jerking that began in her right thumb and progressively spread up her right arm over approximately 30 seconds. Throughout the episode, she remained fully alert and aware of her surroundings. She did not lose consciousness and was able to recall the entire event. Her husband notes her speech remained clear during the event. Vital signs are: BP 158/92 mmHg, HR 102/min, RR 18/min, temperature 37.2°C, SpO2 98%. Serum glucose is 98 mg/dL. Brain MRI reveals a 2.5-cm mass in the left central sulcus with surrounding vasogenic edema, suspicious for glioma. Which of the following seizure types BEST characterizes this presentation?