Figure 5.

Training-induced connectivity patterns between interneurons as specified by the illustration at top. Middle and bottom: the synaptic weights before and after the example training session. Each row describes the synaptic input to an interneuron and each column describes the output. The excitatory interneurons (INe, red labels) and inhibitory interneurons (INi, blue labels) are separated and regrouped according to the β motoneuron (βMN) to which they have the strongest synaptic projection [left to right order of left extensor (LE), left flexor (LF), right extensor (RE), right flexor (RF)]. The row and column labeling of the interneurons consists of the unique letter label from Fig. 3 followed by the identity of the βMN that receives the strongest projection from that interneuron. The black cells are nonsynapses.