rod bipolar cell

Rod bipolar cells do not synapse directly on to ganglion cells.

One such population, AII, 'piggybacks' rod bipolar cells onto the cone bipolar circuitry.

It connects rod bipolar cell output with cone bipolar cell input, and from there the signal can travel to the respective ganglion cells.

For instance, it goes through a light-dependent intracellular translocation to rod synaptic terminals and improves the signal transfer between rods and rod bipolar cells in the retina of mice.

There are roughly 10 distinct forms of cone bipolar cells, however, only one rod bipolar cell, due to the rod receptor arriving later in the evolutionary history than the cone receptor.