This volume features in-depth reviews of the major issues and emerging topics in cognitive neurosciences. The contributors are among the top researchers in the field. "NOTE: Annals volumes are available for sale as individual books or as a journal. For information on institutional journal subscriptions, please visit" "www.blackwellpublishing.com/nyas"."" "ACADEMY MEMBERS: Please contact the New York Academy of Sciences directly to place your order (""www.nyas.org""). Members of the New York Academy of Science receive full-text access to the Annals online and discounts on print volumes. Please visit http: //www.nyas.org/MemberCenter/Join.aspx for more information about becoming a member."