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Upstroke:downstroke ratio

The average ratio between the absolute values of the action potential peak upstroke (i.e. max dV/dt) and the action potential peak downstroke (i.e. min dV/dt) for "Short Square" pulses.

Fast AP trough

Minimum value of the membrane potential in the interval lasting 5 ms after the peak of the first action potential for the minimum amplitude "Long Square eliciting " stimulus that elicited an action potential.

FI curve slope

Frequency response Slope of the frequency response (in spikes/sec) vs. stimulus intensity slope (in pA) curve based on a linear regression for all suprathreshold "Long Square" sweeps.


Minimum stimulus amplitude eliciting an action potential from "Long Square" sweeps.

Ramp AP Time

Average time of the peak response of the first action potential for "Ramp" sweeps.

Resting Vm

Average resting potential of across all "Long Square" sweeps.

Please read the electrophysiology technical white paper (TODO) for a complete list of computed features and their interpretations.


Model Name


Biophysical, perisomatic

Models with active conductances at the soma and morphology based on full 3D reconstruction.

1 Leak Leaky Integrate and Fire (LIF)

Membrane potential evolves as a function of neuron properties (capacitance, membrane conductance, resting potential) and external current combined with a reset rule if membrane potential surpasses a fixed voltage threshold.

2 LIF + Reset Rules (LIF-R)


3 LIF + Afterspike Currents (LIF-ASC)


4 LIF-R + Afterspike Currents (LIF-R-ASC)


5 LIF-R-ASC + Threshold Adaptation (LIF-R-ASC-A)