Question

Research shows that both hemispheres of the brain are involved in most tasks, but split-brain studies demonstrate that

the left hemisphere plays a major role in producing speech.
the right hemisphere is primarily responsibly for verbal language.
the right hemisphere is responsible for motor movements.
language is not impacted when the hemispheres are divided.

Answer 1

Split-brain studies demonstrate that the left hemisphere plays a major role in producing speech. In individuals with split-brain conditions, where the corpus callosum (the bridge between the two hemispheres) is severed, it has been shown that the left hemisphere is mainly responsible for language and speech functions, while the right hemisphere is better at processing visual and spatial information. Thus, the correct statement is that the left hemisphere plays a major role in producing speech.