P0–P3 (n = 72) | P8–P11 (n = 36) | ||||
---|---|---|---|---|---|
Property | Mean | SE | Mean | SE | P Value |
Action potential | |||||
Amplitude, mV | 74.06 | 1.16 | 74.90 | 2.47 | NS (0.73) |
Half-width, ms | 1.33 | 0.05 | 0.97 | 0.07 | <0.0001* |
Time-to-peak, ms | 0.98 | 0.04 | 0.81 | 0.06 | <0.05* |
Threshold, mV | −51.86 | 0.77 | −56.00 | 2.12 | <0.05* |
Rheobase current, pA | 157.60 | 8.41 | 287.70 | 40.71 | <0.0001* |
Rheobase current CV, % | 38.15 | 79.42 | <0.05* | ||
Afterhyperpolarization | |||||
Half-decay time, ms | 45.31 | 10.83 | 48.63 | 20.15 | NS (0.30) |
Half-decay time CV, % | 22.07 | 43.36 | <0.001* | ||
Duration, ms | 152.80 | 5.13 | 148.20 | 9.94 | NS (0.48) |
Input resistance (Rin), MΩ | 99.47 | 6.45 | 87.27 | 10.23 | NS (0.30) |
Rin CV, % | 41.29 | 79.81 | <0.05* | ||
f–I gain, Hz/nA | 56.26 | 3.03 | 56.09 | 8.55 | NS (0.98) |
f–I gain CV, % | 32.03 | 33.59 | NS (0.92) |
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n = number of motoneurons. CV, coefficient of variation.
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↵* indicates significance; NS, not significant.