“…Some of these systems permit the threedimensional reconstruction of the ultrastructure of individual neurons or their processes from serial electron micrographs (Levinthal and Ware, 1972;Willey et al, 1973;Levinthal et al, 1974;Rakic et al, 1974;Ward et al, 1975;White et al, 1976;Lewis and Hodgkin, 1977;Mazziotta and Hamilton, 1977;Veen and Peachey, 1977;Shantz and McCann, 1978;Street and Mize, 1983). Another group of computer-aided systems permit the analysis of intracellularly stained (Reddy et al, 1973) or Golgi-impregnated neurons, their processes (Coleman et al, 1973;Standler and Bernstein, 1982), and their graphic reconstruction and display (Wann et al, 1973;Llinas and Hillman, 1975;Capowski and Rethelyi, 1978;Capowski and Sedivec, 1981).…”