Persistent delay activity in cortex: a Galilean phase in neurophysiology?

This paper underlines the computational, methodological and conceptual importance of delay activity experiments in cognitively performing animals. The argument consists of two parts. First, a delineation of the various dimensions affected by these experiments. Second, an outline, in the light of the first part, of several outstanding questions (or predictions) calling for future experimental and theoretical effort.*Discussion paper for the Human Frontiers meeting, Hakone, Japan, April 1994.