L homonymous hemianopsia indicates a lesion on which occipital lobe?

Homonymous hemianopsia is a condition characterized by a loss of half of the visual field in both eyes, typically occurring on the same side. When a person has right homonymous hemianopsia, it indicates that there is damage to the left occipital lobe. Conversely, when left homonymous hemianopsia is present, the lesion is located in the right occipital lobe. This is because visual information from the right visual field is processed in the left occipital lobe, and vice versa for the left visual field.

In the context of the question, if the answer indicated is right homonymous hemianopsia, the lesion would indeed be in the right occipital lobe. This is based on the pathways of visual processing, where lesions in one occipital lobe lead to the loss of the opposite visual field.

The other answer options can be elaborated on to clarify why they do not apply:

• A lesion in the left occipital lobe would cause right homonymous hemianopsia, not left.

• Both occipital lobes would typically not cause homonymous hemianopsia; rather, it could lead to a more extensive loss of vision in both visual