In split-brain research, which statement is true?

In split-brain research, which statement is true?

• A. Each hemisphere can control the entire body independently
• B. Each hemisphere can control independent aspects of behavior when the corpus callosum is severed
• C. Language is processed identically in both hemispheres
• D. Emotions are processed only by one hemisphere

Answer: (B)

Split-brain research shows that the two hemispheres have specialized functions and must communicate to integrate information. When the corpus callosum is severed, that communication is disrupted, so each hemisphere can guide its own set of behaviors. This means independent aspects of behavior can emerge from each side, since sensory input and motor output no longer get pooled together across the hemispheres. For example, information processed by one hemisphere can influence actions controlled by the opposite hand, while the other hemisphere remains unaware of that input. Language is usually dominant in the left hemisphere, so language-related tasks don’t transfer across hemispheres as they normally would, and emotions involve complex networks across both sides rather than belonging to one hemisphere exclusively. The key takeaway is that cutting the corpus callosum allows the hemispheres to operate more independently, producing dissociations in perception and action that reveal their specializations.

Split-brain research shows that the two hemispheres have specialized functions and must communicate to integrate information. When the corpus callosum is severed, that communication is disrupted, so each hemisphere can guide its own set of behaviors. This means independent aspects of behavior can emerge from each side, since sensory input and motor output no longer get pooled together across the hemispheres. For example, information processed by one hemisphere can influence actions controlled by the opposite hand, while the other hemisphere remains unaware of that input. Language is usually dominant in the left hemisphere, so language-related tasks don’t transfer across hemispheres as they normally would, and emotions involve complex networks across both sides rather than belonging to one hemisphere exclusively. The key takeaway is that cutting the corpus callosum allows the hemispheres to operate more independently, producing dissociations in perception and action that reveal their specializations.