All but which of the following may result from an occlusion of the posterior cerebral artery?

When discussing the effects of an occlusion of the posterior cerebral artery (PCA), it's important to understand the specific areas of the brain that this artery supplies. The PCA primarily supplies the occipital lobe, which is responsible for visual processing, and portions of the temporal lobe, which can influence memory function.

Unilateral oculomotor palsy is related to compression of the oculomotor nerve, which can occur if there's increased intracranial pressure or if another vascular structure is compromised due to insufficient blood flow in areas around the PCA supply. This dysfunction is consistent with PCA occlusion because the brain's pathways for eye movement are affected when the oculomotor nerve is influenced by a lack of blood supply.

Contralateral homonymous hemianopsia is a classic result of PCA occlusion because the occipital lobe lesions lead to visual field defects. Patients often lose the same visual field on opposite sides (i.e., the right PCA affecting the left visual field), due to the crossing of visual pathways.

Memory loss can occur with PCA occlusion as it affects temporal lobe territories where structures related to memory—such as the hippocampus—are located. The temporal lobe plays a significant role in memory processing