TABLE 2.Intrinsic subthreshold and firing physiological properties of NGF cells in monkey and rat
|
||
Monkey | Rat | |
|
||
n | 30 | 19 |
Resting membrane potential, mV | –67 ± 5 | –66 ± 4 |
Spike threshold, mV*** | –41 ± 4 | –35 ± 3 |
Spike amplitude, mV | 58 ± 9 | 60 ± 7 |
Spike half duration, ms | 0.63 ± 0.12 | 0.67 ± 0.07 |
Spike 10–90% rise time, ms | 0.28 ± 0.05 | 0.29 ± 0.04 |
Spike 10–90% rise rate, mV/ms | 184 ± 45 | 180 ± 25 |
Spike 10–90% fall time, ms | 0.54 ± 0.09 | 0.57 ± 0.06 |
Spike 10–90% fall rate, mV/ms | 95 ± 25 | 93 ± 13 |
First spike latency, ms*** | 59 ± 36 | 209 ± 122 |
AHP amplitude, mV*** | 19 ± 4 | 25 ± 4 |
AR coefficient (2 x threshold)*** | 0.47 ± 0.15 (n = 21) | 0.69 ± 0.16 |
Onset frequency (2 x threshold), Hz** | 50 ± 28 (n = 21) | 26 ± 11 |
Steady-state frequency (2 x threshold), Hz* | 24 ± 11 (n = 21) | 17 ± 4 |
Number of spikes at threshold** | 3.1 ± 1.5 | 2.0 ± 1.0 |
Input resistance, MΩ** | 370 ± 200 | 238 ± 80 |
Time constant, ms | 11 ± 4 | 10 ± 4 |
AHP, afterhyperpolarization; AR, adaptation ratio.
* Significantly different between the two species, P<0.05;
** P<0.01;
*** P<0.001.