The scientist who won a Nobel prize for his work with split-brain patients is:

Correct Answer: Roger Sperry

Roger W. Sperry received the 1981 Nobel Prize in Physiology or Medicine for his pioneering research on split-brain patients. His work demonstrated that the left and right hemispheres of the brain have specialized functions and can operate independently when the corpus callosum is severed.

Why the other options are incorrect:

• Walter Cannon: Known for the fight-or-flight response and the concept of homeostasis, not split-brain research.
• Paul Broca: Identified Broca's area, the brain region associated with speech production, but did not conduct split-brain studies.
• James Olds: Known for discovering the brain's reward (pleasure) centers through electrical stimulation, not split-brain research.