Participants at the Kroc Foundation Symposium Nonlinearities in Brain Function, March 1–5, 1982. Front row (left to right): Eugene Yates, Albert Goldbeter, Anna Wirz-Justice, Arthur Winfree, Kirstie Bellman, Alice Kroc, Arnold Mandell. Middle row: William Smith, Scott Kelso, Victor Denenberg, Alan Garfinkel, Peter Whybrow, Donald Walter. Back row: Walter Carey, Erol Basar, Pierre Flor Henry, Ross Adey, Arthur Iberall, Michael Turvey, Doyne Farmer, Ralph Abraham.