Table 1.
Summary of S1 single unit response statistics at different phases of discrimination training
| Phase 2 Day 1, 123 Units | Phase 2 All, 216 Units | Phase 3 <75% Correct, 485 Units | Phase 3 >75% Correct, 206 Units | |
|---|---|---|---|---|
| Percent responding | 63 | 53 | 70 | 70 |
| Percent inhibited | 28 | 42 | 43 | 30 |
| Excited response durations, s | 0.58 ± 0.05 | 0.43 ± 0.03 | 0.56 ± 0.03 | 0.72 ± 0.04 |
| Inhibited response durations, s | 0.44 ± 0.07 | 0.40 ± 0.03 | 0.51 ± 0.03 | 0.52 ± 0.05 |
| Percent excited durations > 0.5 s | 37 | 27 | 42 | 49 |
| Percent inhibited durations > 0.5 s | 26 | 23 | 36 | 37 |
| Excited magnitudes, spks/trial | 17 ± 3 | 6.9 ± 0.9 | 27 ± 3 | 23 ± 3 |
| Inhibited magnitudes, spks/trial | 8 ± 2 | 10 ± 2 | 32 ± 5 | 18 ± 4 |
Values are means ± SE. S1, Somatosensory cortex. The overall trend was for response durations and magnitudes to grow over the course of discrimination training. Phase 2 Day 1 refers to the first day of exposure to the aperture stimuli, with no discrimination training. Phase 2 All refers to all sessions before any discrimination training (phase 2), Phase 3 <75% Correct indicates discrimination training sessions when the rat correctly discriminated fewer than 75% of trials (phase 3), and Phase 3 >75% Correct refers to sessions when the rat correctly discriminated at least 75% of trials (phase 3). Percent responding, the percentage of units that significantly modulated their firing rate relative to the time of a beam break between the bars of the aperture stimulus; Percent inhibited, the percentage of inhibited responses, i.e. suppressions of firing; Excited response durations, the average duration of excited responses in seconds; Inhibited response durations, the average duration of inhibited responses in seconds; Percent excited durations > 0.5 s, the percentage of excited responses that lasted longer than 0.5 s; Percent inhibited durations > 0.5 s, the percentage of inhibited responses that lasted longer than 0.5 s; Excited magnitudes, the average magnitude of excited responses in spikes per trial; Inhibited magnitudes, the average magnitude of inhibited responses in spikes per trial.