Marian C. Diamond, Ph.D., is a Professor of Anatomy at the University of California at Berkeley. She teaches general human anatomy and neutoanatomy and has conducted numerous lines of reasearch into the effect of the environment and hormones on the forebrain. Dr. Diamond is perhaps best known for her investigations into structural changes in the cerebral cortex induced by an enriched environment and structural lateralization of the cortex as influenced by sex steroid hormones.