Table 1. Connection weights.
| Source | Target () |
|---|---|
| Within brainstem | |
| CnF-Glu | i-PPN-Glu (0.56), i-LPGi-Glu-1 (0.95), i-LPGi-Glu-2 (1.02),c-CnF-Glu (0.1), c-PPN-Glu (0.15), c-LPGi-Glu-1 (0.45),c-LPGi-Glu-2 (0.08), |
| CnF-GABA/GLY | i-CnF-Glu (−0.5), i-PPN-Glu (−0.5) |
| PPN-Glu | i-LPGi-Glu-1 (1), c-LPGi-Glu-1 (0.4) |
| PPN-GABA/GLY | i-PPN-Glu (−0.5), |
| LPGi-GABA/GLY | i-LPGi-Glu-1 (−0.5), i-LPGi-Glu-2 (−0.5) |
| Vestibular input to spinal cord | |
| VN | i-RG-E (1) |
| From brainstem to relay neurons | |
| LPGi-Glu-1 | i-Ine (1), i-CINe (1) |
| LPGi-Glu-2 | i-dIni (1), c-dIni (1) |
| LPGi-GABA/GLY | c-Ine(−0.5), c-CINe (−0.5) |
| From relay neurons to spinal circuits | |
| Ine | i-RG-F (1) |
| Ini | i-V0D (4), i-V0V (1.7), i-f-V0D-LPN (7.5) |
| CINe | c-RG-F (1) |
| Within girdle and side of the cord | |
| RG-F (fore and hind) | i-InF (0.4), i-V0D (0.7), i-V2a-lr (1), i-V3 (0.35), i-V2a-diag (0.5) |
| f-RG-F (fore only) | i-LPNi (0.7), i-V0D-LPN (0.5) |
| RG-E | i-InE (0.4), i-CINi (0.4), i-Sh2-LPN (0.5) |
| InF | i-RG-E (–1) |
| InE | i-RG-F (–0.08) |
| V2a-lr | i-V0V (1) |
| V2a-diag | i-V0V-LPN (0.9) |
| Ini | i-RG-F (–0.075) |
| Between left and right circuits within a girdle | |
| V0D | c-RG-F (–0.07) |
| V0V | c-Ini (0.6) |
| V3 | c-RG-F (0.03) |
| CINi | c-RG-F (–0.03) |
| Between fore and hind circuits | |
| f-LPNi | ih-RG-F (–0.01) |
| f-Sh2-LPN | ih-RG-F (0.01) |
| h-Sh2-LPN | if-RG-F (0.075) |
| f-V0D-LPN | ch-RG-F (–0.1) |
| f-V0V-LPN | ch-RG-F (0.02) |
| h-V0V-LPN | cf-RG-F (0.065) |
i-, ipsilateral; c-, contralateral; f-, fore; h-, hind; CINi, inhibitory commissural interneurons; Ini, inhibitory interneurons; InE, extensor center inhibitory interneuron; InF, flexor center inhibitory interneuron; LPNi, inhibitory long propriospinal neuron; dIni, inhibitory relay neurons; Ine, ipsilaterally projecting tonically active excitatory relay neurons; CINe, commissural tonically active excitatory relay neurons; RG-F, flexor center, RG-E, extensor center. For target neurons with copies in both, the cervical and the lumbar circuits, connection weights are identical unless otherwise noted.