Speech production area in the frontal lobe

Surgery designed to treat epileptics by severing the corpus callosum; contributed greatly to understanding the lateralization of brain function

Studied the relation between language, thought, and cortical functions; his work resulted in creating the field of neuropsychology

Split-brain research; understanding of functional lateralization in the brain; how the cerebral hemispheres communicate

natural selection, survival of the fittest

Speech comprehension area in the temporal lobe