Figure 8.

Electron micrographs of the AIS-like dendrites (A,B) and the ordinary dendrite (C) of AII amacrine cells. A,B: Many patches of dense material undercoating the surface membrane are observed (short arrows). An input synapse from the other amacrine cell is also seen (long arrow). Insets: High magnification of each labeled portion (asterisks). Patches of dark granular material appear just beneath the cell membrane (short arrows). C: The descending dendrite toward the distal arbor end of AII 3. No dense patches are observed. Scale bar = 500 nm.