Contributors; Foreword E. V. Evarts; Editor's preface C. Trevarthen; Part I. Specification of Behavioral Nerve Networks in Invertebrates: 1. Ontogenesis of neuronal nets: the chemoaffinity theory, 1963-1983 R. Levi-Montalcini; 2. The chemoaffinity hypothesis: an appreciation of Roger W. Sperry's contributions to developmental biology R. K. Hunt and W. M. Cowan; 3. Retinotectal connections made through ectopic optic nerves E. Hibbard; 4. Neural reconnection between the eye and the brain in goldfish M. G. Yoon; 5. The case for chemoaffinity in the retinotectal system R. L. Meyer; Part II. Split-Brain Studies of Perception, Motor Coordination, and Learning in Cats and Monkeys, and Comparisons to Humans: 6. The role of the corpus callosum in the representation of the visual field in cortical areas G. Berlucchi and A. Antonini; 7. Studies of visual perception and orienting in cats with fore- and midbrain commissure section J. S. Robinson and T. J. Voneida; 8. Brain pathways in the visual guidance of movement and the behavioral functions of the cerebellum M. E. Glickstein; 9. Intermanual transfer, interhemispheric interaction, and handedness in man and monkeys B. Preilowski; 10. Hemispheric specialization in monkeys C. R. Hamilton; 11. A corticolimbic memory path revealed through its disconnection M. Mishkin and R. R. Phillips; Part III. Cerebral Hemispheres and Human Consciousness: 12. Partial hemispheric independence with the neocommissures intact J. E. Bogen; 13. Regulation and generation of perception in the asymmetric brain J. Levy; 14. The neurobiological basis of hemisphericity H. W. Gordon; 15. Long-term semantic memory in the two cerebral hemispheres D. W. Zaidel; 16. Hughlings Jackson on the recognition of places, persons, and objects O. L. Zangwill and M. A. Wyke; 17. Lessons from cerebral commissurotomy: auditory attention, haptic memory, and visual images in verbal associative-learning B. Milner; 18. The saga of right-hemisphere reading E. Zaidel; 19. The role of the right cerebral hemisphere in evaluating configurations L. I. Benowitz; 20. Growth and education in the hemispheres C. Trevarthen; 21. Hemispheric specialization in the aged brain R. D. Nebes; 22. Forebrain commissurotomy and conscious awareness R. W. Sperry; Appendix A: publications of Roger W. Sperry; Appendix B: students and collaborators of Roger W. Sperry; Index.