*Columbia University, New York, New York, U.S.A.; †University of Pittsburgh, Pittsburgh, Pennsylvania, U.S.A.; ‡Beth-Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, U.S.A.; §Mayo Clinic and Medical Center, Rochester, Minnesota, U.S.A.; ∥Johns Hopkins Bayview Medical Center, Baltimore, Maryland, U.S.A.; ¶Jordan Neuroscience, Inc., San Bernardino, California, U.S.A.; #University of Pennsylvania, Philadelphia, Pennsylvania, U.S.A.; **Emory University, Atlanta, Georgia, U.S.A.; ††University of Western Ontario, London, Ontario, Canada; and the ‡‡University of Virginia, Charlottesville, Virginia, U.S.A.

This article is a report of an ad hoc subcommittee meeting at the American Clinical Neurophysiology Society meeting held in Montreal, Canada, on September 30, 2004, and subsequent discussions.

Address correspondence and reprint requests to Dr. Hirsch, Department of Neurology, Comprehensive Epilepsy Center, Columbia University, 710 West 168^th Street, Box NI-135, New York, NY 10032 U.S.A.; e-mail: [email protected].