Connectivity map in A1
| No. of presynaptic cells | L2/3 | L4 | L5 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| RS | FS | SI | E | FS | IB | RS | FS | SI | |
| L2/3 | |||||||||
| RS | 10 (0.02) | 20 (0.3) | 10 (0.03) | 0 | 0 | 20 (0.05) | 20 (0.05) | 20 (0.4) | 0 |
| FS | 10 (1.2) | 10 (0.2) | 10 (0.6) | 8 (0.03) | 0 | 0 | 0 | 0 | 0 |
| SI | 10 (0.02) | 10 (1.0) | 2 (0.2) | 0 | 0 | 10 (0.01) | 10 (0.01) | 0 | 0 |
| L4 | |||||||||
| E | 10 (0.3) | 0 | 0 | 10 (0.03) | 20 (0.25) | 10 (0.01) | 10 (0.01) | 0 | 0 |
| FS | 10 (0.1) | 0 | 0 | 20 (0.3/0.6) | 20 (0.3) | 0 | 0 | 0 | 0 |
| L5 | |||||||||
| IB | 0 | 2 (0.1) | 2 (0.25) | 0 | 0 | 5 (0.02) | 5 (0.01) | 10 (0.3) | 10 (0.2) |
| RS | 0 | 2 (0.1) | 2 (0.25) | 0 | 0 | 5 (0.01) | 5 (0.01) | 10 (0.3) | 10 (0.2) |
| FS | 0 | 0 | 0 | 0 | 0 | 20 (0.4) | 20 (0.4) | 20 (0.8) | 10 (0.8) |
| SI | 0 | 10 (0.02) | 0 | 0 | 10 (0.6) | 20 (0.5) | 20 (0.5) | 10 (0.03) | 20 (0.4) |
In our model, each postsynaptic cell received synaptic inputs from various types of cells. The rows show the type of postsynaptic cells and columns represent presynaptic cells. We list how many presynaptic cells of a particular type were connected to a postsynaptic cell. For example, L2/3 FS cells received excitation from 2 L5 IB cells. The numbers inside parentheses are maximal conductance of corresponding synapses. If a pair of numbers is given, the first and second shows parameters with and without cholinergic modulation, respectively. In addition, L2/3 FS and SI cells received excitation from 10 L2/3 RS cells via NMDA synapses; the maximal conductance value was 0.01 μS/cm2. Because Roopun et al. (2010) suggested that only L5 SI cells produced inhibition oscillating in the beta-frequency band and that all L5 cells received beta rhythmic inhibition, all L5 cells of our model received inhibition from L5 SI cells. Also, we made inhibitory connections among L2/3 SI cells sparse (Gibson et al., 1999).