A 40-year-old female librarian is brought to the emergency depament. Neurologic examination reveals the following: blood pressure 160/90 mm Hg, weakness on the right side of her inferior face, no weakness in upper or lower limbs, tongue deting to right side on protrusion, and uvula deting to the left side when patient says "ah." In which of the following loci is the lesion causing these symptoms found?