Figure 9.
Electron micrographs of synaptic contacts (arrows) of OFF bipolar cells with midget and parasol ganglion cells. (A) The axon of cell FMB-1forms a ribbon (arrow head) synapse with the dendrite of cell MG-3. (B) Cell DB1-3 projects ribbon synapses to the dendrites of two cells MG-13 and PG-1. (C) Cells DB2-1 and DB3b-1 project ribbon synapses to the same dendrite of cell PG-1. (D) Cells DB3a-1 and DB3a-2 are coupled by a gap junction (arrows within brackets) and project ribbon synapses to the dendrites of cell PG-1. Bipolar letterings are abbreviated without “B.”