Table 1.
Comparison of physiological properties across three groups of animals
| Variable | Ipsi | Contra | Untrained | ANOVA |
|---|---|---|---|---|
| SN Vresting (mV) | −46.98 ± 2.77 | −44.80 ± 2.36 | −51.10 ± 3.22 | p = 0.36 |
| SN input resistance (MΩ) | 28.57 ± 3.34 | 19.21 ± 4.41 | 30.20 ± 7.25 | p = 0.31 |
| MN Vresting (mV) | −51.32 ± 4.99 | −48.07 ± 2.08 | −50.25 ± 3.03 | p = 0.85 |
| MN input resistance (MΩ) | 12.33 ± 2.52 | 12.05 ± 2.15 | 13.93 ± 2.59 | p = 0.85 |
| EPSPa peak (mV) | 12.71 ± 1.65 | 6.14 ± 1.49 | 5.59 ± 1.22 | p < 0.005 |
| EPSP width (ms) | 84.01 ± 12.04 | 71.95 ± 9.56 | 77.54 ± 12.53 | p = 0.76 |
| EPSP decay time (ms) | 269.28 ± 49.36 | 273.32 ± 50.66 | 189.58 ± 48.04 | p = 0.46 |
| Spikeb peak (mV) | 98.54 ± 2.92 | 88.38 ± 2.77 | 90.16 ± 3.06 | p = 0.06 |
| Spikeb width (ms) | 2.92 ± 0.14 | 3.46 ± 0.15 | 3.54 ± 0.11 | p < 0.05 |
| Spikeb decay time (ms) | 3.96 ± 0.30 | 4.10 ± 0.14 | 4.55 ± 0.11 | p = 0.08 |
| Spikec peak (mV) | 90.08 ± 4.17 | 75.40 ± 2.93 | 80.78 ± 3.15 | p< 0.05d |
| Spikec width (ms) | 1.74 ± 0.09 | 2.54 ± 0.22 | 2.32 ± 0.12 | p< 0.05 |
| Spikec decay time (ms) | 2.67 ± 0.23 | 3.49 ± 0.24 | 3.76 ± 0.48 | p = 0.14 |
| Spikec rise time (ms) | 1.33 ± 0.03 | 1.87 ± 0.19 | 1.58 ± 0.08 | p < 0.05d |
Data are represented as mean ± SEM and significant differences appear in bold. SN, Sensory neuron; MN, motor neuron; Vresting, resting potential.
aAll EPSP variables were measured from the first EPSP of 0.1 Hz trains of spikes for which the entire trace was visible. The average EPSP amplitude reported in the text includes values both from 0.1 and 10 Hz trains and is slightly different from the one reported here.
bSpikes recorded from isolated ganglia. Rise time could not be reliably measured because of the stimulus-evoked prepotential.
cSpikes recorded from reduced preparations.
dThe difference is significant only between ipsilateral and contralateral groups.