Review Question - QID 109326

A 75-year-old male is brought to the emergency room by his daughter due to slurred speech and a drooping eyelid on the right side. This morning, he had difficulty eating his breakfast and immediately called his daughter for help. She says that his voice also seems different. His temperature is 99°F (37.2°C), blood pressure is 120/78 mmHg, pulse is 90/min, respirations are 21/min, and pulse oximetry is 98% on room air. On physical exam, he is oriented to time and place. There is right-sided nystagmus and he has difficulty with point-to-point movement. Where is the lesion responsible for his symptoms most likely located?