Diameter (μm) |
18.8 ± 1.6 |
32 |
20.7 ± 2.2 |
60 |
<0.001 |
Action potential parameter: |
Resting potential (mV) |
−53.0 ± 7.0 |
21 |
−51.6 ± 5.0 |
38 |
n.s |
Amplitude (mV) |
93.2 ± 13.6 |
21 |
89.3 ± 11.6 |
38 |
n.s. |
Duration at takeoff voltage (ms) |
3.6 ± 1.5 |
21 |
89.3 ± 11.6 |
38 |
n.s. |
After-hyperpolarisation (AHP) (mV) |
4.4 ± 2.9** |
16 |
12. ± 4.7 |
38 |
<0.001 |
AHP-hyperpolarisation (AHP) (mV) |
100 ± 96** |
13 |
112 ± 68 |
38 |
n.s. |
Number showing inflection |
8/21(38%) |
|
27/38(71%) |
|
<0.001 (X2test)
|
Voltage-gated currents: |
Ih amplitude (pA)
|
106 ± 79 |
33 |
71.4 ± 47 |
63 |
0.008 |
Decay time constant of transient inward current (ms) |
0.9 ± 0.2 |
32 |
2.3 ± 0.9 |
63 |
<0.0001 |
Number expressing A-type K+ current
|
14/33(42%) |
|
50/64(78%) |
|
<0.001 (X2 test)
|