Gazzaniga argues that without language right hemisphere cognition is vastly limited and that most normal right hemispheres have no language and only "rudimentary cognition." These assertion ignore important nonlinguistic observations, as well as findings with hemispheric sodium amytal anesthesia and laterality effects for complex cognitive tasks…

Although it occurs only infrequently in split brain patients, right hemisphere linguistic competence ranges from simple comprehensive skills to a system that can both recognize written and spoken language and produce speech. Such patients are also valuable for the study of global mechanisms, such as those underlying the sense of conscious unity.…

Studies in intellectual development, brain organization, and learning are summarized. They show that neither intelligence nor giftedness are solely the result of cognitive functions. Both rely on the use of the total brain in an appropriate environment. Intelligence is dynamic. It must be used and developed or it will be lost. (PS)

Fleeting electrochemical connections made between brain cells help people remember the thoughts, skills, experiences, and knowledge that make them unique. Presents the dissection of the brain of a sheep, an animal in which brain structure and function are similar to that in humans, to demonstrate where these processes take place. (PVD)