Which statement best describes the mapping of dorsal and ventral streams to the brain lobes?

Which statement best describes the mapping of dorsal and ventral streams to the brain lobes?

• A. The dorsal stream projects to the temporal lobe and the ventral stream to the parietal lobe.
• B. The dorsal stream projects to the frontal lobe and the ventral stream to the occipital lobe.
• C. One stream projects to the parietal lobe and the other to the temporal lobe.
• D. Both streams terminate in the occipital lobe.

Answer: (C)

The main idea is that visual processing splits into two pathways after the initial visual processing in the occipital lobe. The dorsal pathway carries information to the parietal lobe and handles spatial location, motion, and how to guide actions in space. The ventral pathway sends information to the temporal lobe and handles object identity, form, color, and recognition. Therefore, the best description is that one stream projects to the parietal lobe and the other to the temporal lobe. Why the other ideas aren’t correct: placing the dorsal stream in the temporal lobe would mislabel its role in spatial processing, and sending the ventral stream to the occipital lobe ignores that these streams extend beyond occipital into higher-order areas.

The main idea is that visual processing splits into two pathways after the initial visual processing in the occipital lobe. The dorsal pathway carries information to the parietal lobe and handles spatial location, motion, and how to guide actions in space. The ventral pathway sends information to the temporal lobe and handles object identity, form, color, and recognition. Therefore, the best description is that one stream projects to the parietal lobe and the other to the temporal lobe.

Why the other ideas aren’t correct: placing the dorsal stream in the temporal lobe would mislabel its role in spatial processing, and sending the ventral stream to the occipital lobe ignores that these streams extend beyond occipital into higher-order areas.