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Models

Neuron

Leaky-Integrate-and-Fire (LIF)

http://www.cns.nyu.edu/~eorhan/notes/lif-neuron.pdf

Properties:

  • MembranePotentialThreshold: threshold of the membrane potential, above which the neuron fire (v_th)
  • MembraneLeakTime: leak constant applied to the membrane potential (tau)
  • MembraneRefractoryDuration: time during which a neuron is inactive after a fire
  • MembraneInhibitionDuration: time during which a neuron is inactive after an incoming inhibition spike
  • MembraneThresholdType: type of the threshold. Can be static (constant) or dynamic (adaptive threshold)
  • AdaptiveThreshold: potential of the adaptive threshold
  • AdaptiveThresholdAdd: value added at each neuron output fire
  • AdaptiveThresholdLeak: leak constant applied to the adaptive threshold

Spike Response Model (SRM)

http://icwww.epfl.ch/~gerstner/SPNM/node27.html

Properties:

  • MembranePotentialThreshold: threshold of the membrane potential, above which the neuron fire (v_th)
  • MembraneRestingPotential: resting potential of the membrane (v_rest)
  • MembraneTimeConstant: time constant of the membrane
  • SynapseTimeConstant: time constant of the synapses
  • MembraneRefractoryDuration: time during which a neuron is inactive after a fire
  • MembraneThresholdType: type of the threshold. Can be static (constant) or dynamic (adaptive threshold)

Izhikevich

http://www.izhikevich.org/publications/spikes.htm

Properties:

  • MembranePotentialThreshold: threshold of the membrane potential, above which the neuron fire (v_th). default is 30 mv

Synapses

Static

Synapse with fixed weight and delay.

Constructors:

  1. w (Float): weight of the synapse
  2. d (Time): post delay of the synapse

Standard STDP

STDP model implemented from:

Synaptic Modifications in Cultured Hippocampal Neurons: Dependence on Spike Timing, Synaptic Strength, and Postsynaptic Cell Type Guo-qiang Bi and Mu-ming Poo, 1998

Constructors:

  1. w (Float): weight of the synapse
  2. d (Time): post delay of the synapse

Simplified STDP

STDP model implemented from: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6033439

Constructors:

  1. stdpWindow (Time): duration of the LTP window
  2. w (Float): weight of the synapse

Ternary

Synapse with output reduced states (+1, 0, -1) and internal STDP

Inhibitory

A synaptic model which send inhibitory messages to the post neuron

Constructors:

  1. delay (Time): post delay of the synapse
models.txt ยท Last modified: 2017/06/19 14:29 by Pierre.Falez@univ-lille1.fr