Table 3.

Effect of cross-depolarization evoked by a conditioning tetanus (10 sec, 50 or 100 Hz) and of an equivalent depolarization induced by intracellular current injection onRinRinconditioning and ΔRin depolarization, respectively) and on firing probability

Neuron typeRin(MΩ)Crossdepolarization (mV)ΔRin conditioning (%)ΔRin depolarization (%)ΔRin# difference (%)Δ Firing probability
Conditioning (n/20)Depolarization (n/20)
A0 mean ± SD11.3  ± 5.83.9  ± 3.41.3  ± 9.5−16.8  ± 13.918.1**  ± 16.29.9  ± 4.72.9*  ± 6.2
(ncells)(23)(25)(23)(23)(23)(10)(10)
AINF mean ± SD13.7  ± 9.64.6  ± 4.9−5.9  ± 8.5−22.1  ± 18.616.2**  ± 15.68.0  ± 2.45.5  ± 4.4
(ncells)(19)(19)(19)(19)(19)(4)(4)
A0 + AINF mean ± SD12.4  ± 7.84.5  ± 4.2−2.0  ± 9.6−19.2  ± 16.217.2**  ± 15.79.4  ± 4.14.0*  ± 6.4
(ncells)(42)(44)(42)(42)(42)(14)(14)
  • *p < 0.05, **p < 0.001 using two-tailed Mann–Whitney tests comparing conditioning versus an equivalent depolarizing pulse.

  • Rin difference = ΔRin conditioning − ΔRin depolarization.