EPSP input-output functions during stratum radiatum stimulation obtained for the same ranges of stimulating current
| WMT1 | SW1 | Naı̈ve | WMT3 | SW3 | |
|---|---|---|---|---|---|
| Average stimulating I, μA | 17.2 ± 3.7* (30) | 19.2 ± 4.22-160 (30) | 6.2 ± 1.9 (48) | 7.5 ± 1.3‡ (55) | 6 ± 0.5‡ (56) |
| Maximum subthreshold I, μA | 26.1 ± 4.12-160 (39) | 27.4 ± 52-160 (38) | 9.4 ± 3 (51) | 12.7 ± 2.5† (57) | 9.3 ± 0.9‡ (58) |
| I, μA | 17.2 ± 3.7 (30) | 19.2 ± 4.2 (30) | — | — | — |
| Slope | 1.2 ± 0.3 (30) | 1.38 ± 0.5 (30) | — | — | — |
| I, μA | — | — | 2.2 ± 0.1 (15) | 2.4 ± 0.2 (10) | 2.4 ± 0.3 (7) |
| Slope | — | — | 4.4 ± 0.6 (15) | 3.7 ± 0.7 (10) | 4.7 ± 0.6 (7) |
| I, μA | — | — | 3.5 ± 0.2 (15) | 4.1 ± 0.12-160 (21) | 4.1 ± 0.12-160 (23) |
| Slope | — | — | 2 ± 0.2 (15) | 2.3 ± 0.2 (21) | 2.3 ± 0.2 (23) |
| I, μA | — | — | 5.7 ± 0.3 (7) | 6 ± 0.2 (9) | 5.9 ± 0.2 (13) |
| Slope | — | — | 0.9 ± 0.1 (7) | 1.4 ± 0.2 (9) | 1.5 ± 0.2 (13) |
| I, μA | 5.3 ± 0.7* (14) | 5.8 ± 0.42-160 (17) | 3.9 ± 0.3 (42) | — | — |
| Slope | 2.2 ± 0.5 | 2.2 ± 0.8 | 2.6 ± 0.3 | — | — |
-
The slope mean values of linear regressions of stimulating current versus EPSP amplitude obtained for the same stimulation intensity. Parentheses enclose number of neurons. There were no learning-specific changes in the I-O functions: the slopes were not different among the WMT1, SW1, and naı̈ve cells, and the slopes were also not different among the WMT3, SW3, and naı̈ve cells. A minor group of cells with 0.05-ms stimulating impulses are not included in this analysis. Average stimulating current calculated only for neurons with 3 points in the I-O functions. Maximum stimulating current calculated for all neurons. I, μA mean current intensity applied for the st. radiatum stimulation.
-
↵* P < 0.05,
-
↵F2-160 P< 0.01 significantly different from naı̈ve control;
-
↵† P < 0.05,
-
↵‡ P < 0.01 significantly different from the SW1 and WMT1 groups, Fisher's and Scheffe's (for stimulating current only) post hoc tests.