Table 23.
Calculated convergence of interneurons onto a CA1 pyramidal cell. Note that several cell types are not included here, such as back-projection, radiatum-retrohippocampal, and more. The numbers in this table are based on Table 5 and the total number of cells from Table 4.
| Cell Type | Total Cells |
Boutons /Cell |
Boutons | Boutons /Conn. |
Convergence | ||
|---|---|---|---|---|---|---|---|
| Total (M) | % on Pyr. Cells | /Pyr. Cell | |||||
| Ivy | 8,810 | 16,200 | 142.7 | 92% | 422 | 10 | 42 |
| Neurogliaform | 3,580 | 13,200 | 47.3 | 92% | 140 | 10 | 14 |
| O-LM | 1,640 | 16,370 | 26.8 | 89% | 77 | 10 | 8 |
| Double proj. | 760 | 6,080 | 4.6 | 92% | 14 | 10 | 1 |
| Oriens retrohipp. | 640 | 6,080 | 3.9 | 96% | 12 | 10 | 1 |
| PV+ basket | 5,530 | 10,440 | 57.7 | 99% | 183 | 11 | 17 |
| Bistratified | 2,210 | 15,970 | 35.3 | 92% | 104 | 10 | 10 |
| Axo-axonic | 1,470 | 7,200 | 10.6 | 100% | 34 | 6 | 6 |
| CCK+ basket | 3,600 | 10,000 | 36.0 | 92% | 106 | 8 | 13 |
| SCA | 400 | 12,000 | 4.8 | 92% | 14 | 6 | 2 |
| PPA | 490 | 8,000 | 3.9 | 92% | 12 | 6 | 2 |
| Total per pyr. cell | Inhibitory synapses | 1,118 | Convergence | 116 | |||
Note that the total inhibitory synapses value here represents the number of input synapses for which the inputs have been determined here, not the total number observed as in Megias et al. (2001).