Figure 1. Schematic diagram of some of the inputs to non-reciprocal inhibitory interneurones and midlumbar interneurones.

These diagrams summarise some of the inputs established for group I non-reciprocal inhibitory interneurones (based on Harrison & Jankowska, 1985a), Harrison & Jankowska, 1985b and midlumbar interneurones with group II input (based on Edgley & Jankowska (1987), Davies & Edgley (1994) and other studies (see Jankowska, 1992)). Excitation is represented by lines with a forked end, inhibition by the line ending with a filled circle. Although these diagrams are complex enough, they do not show all connections and do not represent the specific origins of the afferents (specific muscles for proprioceptors, specific skin areas for cutaneous afferents).