Right-sided weakness could be attributed to occlusion in which artery?

Right-sided weakness can arise from occlusion in the left carotid artery due to the crossing of motor pathways in the brain. The brain is organized such that motor control for the right side of the body is managed by the left hemisphere. If there's an occlusion in the left carotid artery, it can lead to decreased blood flow and oxygenation to the left hemisphere, resulting in impaired motor function and weakness on the right side of the body.

Other arteries mentioned do not directly correlate with this specific outcome. The subclavian artery primarily supplies blood to the arms and does not directly influence brain blood flow. The aortoiliac and iliac arteries mainly supply blood to the lower body, and occlusions in those locations would not typically lead to weakness on the right side of the body. Thus, the left carotid artery is the relevant choice for causing right-sided weakness due to its direct linkage with motor control areas in the left hemisphere of the brain.