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. 2015 Feb 24;9:47. doi: 10.3389/fncel.2015.00047

Figure 2.

Figure 2

Electroresponsive properties of the PC model. (A) The traces show spikes in the soma during spontaneous firing and in response to moderate (1.1 nA) and high (2.2 nA) step-current injections in the soma, demonstrating the transition from simple spikes to complex bursting. (B) A series of negative step-current injections in the soma determines voltage responses showing the typical sag and rebound depolarization generated by the H-current. (C) A ramp-current injection (from 0 to 1.6 nA and back) causes a frequency-modulated response in the PC model. (D) In response to step-current injection from 0 to 1.6 nA (0.1 nA steps), the PC model generates proportionately higher spike frequencies. Conversely, the RNs are unable to sustain firing frequencies above 200 Hz (dotted line). In response to ramp-current injection increasing from 0 to 1.6 nA, the f-I curve closely resembles that obtained using step-currents. However, on the way back, the f-I curve is asymmetrical.