Figure 5.

The reciprocal connections between mitral and PGo cells. Spikes from the mitral or PGo cell are sent off-chip by the AER transmitter and routed back to the appropriate axon. The mitral cell is configured so that a “10” type synapse is given a negative weight during synaptic integration. The spike of a PGo cell is routed to its axon in the crossbar which is configured to have a “10” type connection to inhibit the mitral cell. Similarly, the PGo cell is configured so that a “01” type synapse is given a positive weight. The mitral cell axon produces this type of synapse with the PGo cell to excite it.