StaticStdpSynapse Class Reference

Static synapse implementing STDP plasticity. More...

#include <StdpSynapse.h>

Inheritance diagram for StaticStdpSynapse:

Collaboration diagram for StaticStdpSynapse:

List of all members.

Public Member Functions

StaticStdpSynapse (const float Winit=1e-9, const float tau=3e-3, const float delay=1e-3, const bool useFroemkeDanSTDP=true, const float tauspost=50e-3, const float tauspre=50e-3, const float taupos=50e-3, const float tauneg=50e-3, const float STDPgap=2e-3, const int activeSTDP=1, const float Wex=10e-9, const float Aneg=-0.2e-9, const float Apos=0.2e-9, const float mupos=0.0, const float muneg=0.0, const float back_delay=0.0)

Detailed Description

Static synapse implementing STDP plasticity.

STDP is due to Froemke and Dan Nature 416 (3/2002). Implements the basic weight update for a time difference $Delta = t_{post}-t_{pre}$ with presynaptic spike at time $t_{pre}$ and postsynaptic spike at time $t_{post}$ . Then, the weight update is given by $dw = Apos * exp(-Delta/taupos)$ for $Delta > 0$ , and $dw = Aneg * exp(-Delta/tauneg)$ for $Delta < 0$ . (set $useFroemkeDanSTDP=0$ and $mupos=muneg=0$ for this basic update rule).

It is also possible to use an extended multiplicative update by changing mupos and muneg. Then $dw = (Wex-W)^{mupos} * Apos * exp(-Delta/taupos)$ for $Delta > 0$ and $dw = W^{mupos} * Aneg * exp(Delta/tauneg)$ for $Delta < 0$ . (see Guetig, Aharonov, Rotter and Sompolinsky (2003). Learning input correlations through non-linear asymmetric Hebbian plasticity. Journal of Neuroscience 23. pp.3697-3714.)

Set $useFroemkeDanSTDP=1$ (this is the default value) and use $tauspost$ and $tauspre$ for the rule given in Froemke and Dan (2002). Spike-timing-dependent synaptic modification induced by natural spike trains. Nature 416 (3/2002).

Definition at line 35 of file StdpSynapse.h.

Constructor & Destructor Documentation

StaticStdpSynapse::StaticStdpSynapse	(	const float	Winit = `1e-9`,
		const float	tau = `3e-3`,
		const float	delay = `1e-3`,
		const bool	useFroemkeDanSTDP = `true`,
		const float	tauspost = `50e-3`,
		const float	tauspre = `50e-3`,
		const float	taupos = `50e-3`,
		const float	tauneg = `50e-3`,
		const float	STDPgap = `2e-3`,
		const int	activeSTDP = `1`,
		const float	Wex = `10e-9`,
		const float	Aneg = `-0.2e-9`,
		const float	Apos = `0.2e-9`,
		const float	mupos = `0.0`,
		const float	muneg = `0.0`,
		const float	back_delay = `0.0`
	)			`[inline]`

Definition at line 40 of file StdpSynapse.h.

The documentation for this class was generated from the following file:

/home/tnatschl/PCSIM-Sandbox/pcsim/pcsim/simobjects/StdpSynapse.h


Public Member Functions
	StaticStdpSynapse (const float Winit=1e-9, const float tau=3e-3, const float delay=1e-3, const bool useFroemkeDanSTDP=true, const float tauspost=50e-3, const float tauspre=50e-3, const float taupos=50e-3, const float tauneg=50e-3, const float STDPgap=2e-3, const int activeSTDP=1, const float Wex=10e-9, const float Aneg=-0.2e-9, const float Apos=0.2e-9, const float mupos=0.0, const float muneg=0.0, const float back_delay=0.0)