A new three-dimensional atlas, which was revised from the previously reported 0.5-mm-step three-dimensional atlas, is presented. The new three-dimensional atlas consists of serial displays of slices of desired thickness at desired intervals, suited for display of computer-processed data which are stored with three-dimensional coordinates. The responses evoked by stimulation of deep structures by a semimicroelectrode are displayed in this atlas. By this display system, the creation of various neurophysiological atlases based on computer-stored and processed data is facilitated.