A 67-year-old man is evaluated after an acute-onset left facial droop and left-sided weakness. Noncontrast CT shows a small hemorrhage in the region of the right internal capsule. The radiologist notes that the hemorrhage is centered in the white matter bundle that separates two gray matter nuclei, giving them a “striated” appearance on gross dissection. Which pair of structures is being separated by this portion of the internal capsule?

(Assume the hemorrhage involves the anterior limb of the internal capsule.)