Fig. 38 Golig-impregnated müllerian cell showing irregular branching that enables it to pervade interstices between the neurons. Note the numerous expansions near the vitreal and (top). The open spaces, which appear as holes, account for the concept of “tunnels” through the cell. Contours of the following layers are faintly outlined in the background: (1), nerve fiber and ganglion cell; (2) inner plexiform; (3) inner nuclear; (4) outer plexiform (arrowhead points to middle limiting layer); (5) outer nuclear; (6) photoreceptor inner and outer segments (original magnification ×1120).