This book serves as an authoritative and widely accepted account of the effects of age, hormone, experience, and laterality on the cerebral cortex of rats. Since rats are often considered the experimental alter ego of humans, the author's account is considered medical history. This read is sure to influence outlooks on the importance of optimal stimulation during early development, infancy, adulthood and old age. Biologists, psychologists and neurologists, at all stages of their professional growth, should find much to ponder over after reading this book. This item is place in protective moisture and dust resistant wrap before shipping.