Table 3.
Synaptic connectivity between cell populations.
| Experimental values | Model network | |||
| Connection rate (%) | Total possible connections | Number of connections | Maximal synaptic conductance (μS) | |
| EXCITATORY PROJECTIONS | ||||
| RS → RS | 6 | 1260 | 76 | 0.001635 |
| RS → FS | 43 | 216 | 93 | 0.001316 |
| RS → LTS | 57 | 216 | 123 | 0.00099512 |
| INHIBITORY FS PROJECTIONS | ||||
| FS → RS | 44 | 216 | 95 | 0.008 |
| FS → FS | 51 | 30 | 15 | 0.023421 |
| FS → LTS | 36 | 36 | 13 | 0.1 |
| INHIBITORY LTS PROJECTIONS | ||||
| LTS → RS | 35 | 216 | 76 | 0.1059 |
| LTS → FS | 61 | 36 | 22 | 0.002714 |
| LTS → LTS | 4 | 30 | 0 | |
Connection probabilities were based on experimental values in Beierlein et al. (2003) and Gibson et al. (2005) (column 2). Column 4 shows the exact number of connections between the designated cell populations in the model, selected uniformly at random from all possible connections of that type. Column 5 shows the maximal conductance values for individual synapses between cells. The conductances were fixed for all connections between specified populations and equal for each targeted dendritic compartments.