IzhiNeuronBase Class Reference

An Izhikevich neuron. More...

#include <IzhiNeuron.h>

Inheritance diagram for IzhiNeuronBase:

Collaboration diagram for IzhiNeuronBase:

List of all members.

Public Member Functions

IzhiNeuronBase (double a=0.02, double b=0.2, double c=-65.0, double d=8.0, double Vpeak=30.0, double Vinit=-0.06, double Inoise=0.0, double Iinject=0.0, double factI=1.0)

IzhiNeuronBase (string type, double Vinit=-0.06, double Inoise=0.0, double Iinject=0.0, double factI=1.0)

virtual ~IzhiNeuronBase ()

virtual int adjust (double dt)

This tells the object that it should adjust to a new simulation time step width.

virtual int advance (AdvanceInfo const &)

Advance the neuron.

virtual int reset (double dt)

Reset the Izhi-Neuron.

bool refractoryQ ()

Returns true iff the neuron is in its absolute refactory period.

virtual void clearSynapticInput (void)

virtual double getManagedDelay () const

virtual int nSpikeInputPorts () const

virtual int nSpikeOutputPorts () const

virtual int nAnalogInputPorts () const

virtual int nAnalogOutputPorts () const

virtual PortType outputPortType (port_t o) const

virtual PortType inputPortType (port_t i) const

Public Attributes

double Vpeak

If $V_m$ exceeds the Value of $V_m$ is resetet to d. [units=V; range=(-10,100);].

double Vinit

The initial condition for $V_m$ at time $t=0$ . [units=V; range=(-1,1);].

double Inoise

The standard deviation of the noise to be added each integration time constant. [range=(0,1); units=A;].

double Iinject

A constant current to be injected into the LIF neuron. [units=A; range=(-1,1);].

double a

A constant (0.02, 01) describing the coupling of variable u to Vm; [units=D; range=(0,10);].

double b

A constant controlling sensitivity of u. [units=D; range=(0,10);].

double c

A constant controlling reset of Vm (1000*Vreset). [units=mV; range=(-1000,1000);].

double d

A constant controlling reset of u [units=D; range=(0,10);].

Protected Attributes

double Vm

The membrane voltage $V_m$ [readonly; units=V;].

double u

internal variable [readonly; units=V;]

double dt_msec

The time step [readonly; units=msec;].

int noiseType

noise type (0.,,gaussian Noise, 1...pink noise, 3...Ornstein Uhlenbeck noise) [range=(0,2); units=;]

double Isyn

Summation point for all synaptic input currents.

double factI

Static Protected Attributes

static
ThreadSpecificRandomDistribution
< NormalDistribution > white_noise

Random number generator for white noise.

Detailed Description

An Izhikevich neuron.

Implements the model described in Izhikevich, 2004 'Which model to use for cortical spiking neurons'

Model

Definition at line 24 of file IzhiNeuron.h.

Constructor & Destructor Documentation

IzhiNeuronBase::IzhiNeuronBase	(	double	a = `0.02`,
		double	b = `0.2`,
		double	c = `-65.0`,
		double	d = `8.0`,
		double	Vpeak = `30.0`,
		double	Vinit = `-0.06`,
		double	Inoise = `0.0`,
		double	Iinject = `0.0`,
		double	factI = `1.0`
	)

Definition at line 20 of file IzhiNeuron.cpp.

IzhiNeuronBase::IzhiNeuronBase	(	string	type,
		double	Vinit = `-0.06`,
		double	Inoise = `0.0`,
		double	Iinject = `0.0`,
		double	factI = `1.0`
	)

Definition at line 28 of file IzhiNeuron.cpp.

References a, b, c, d, and Vpeak.

virtual IzhiNeuronBase::~IzhiNeuronBase ( ) [inline, virtual]

Definition at line 43 of file IzhiNeuron.h.

Member Function Documentation

int IzhiNeuronBase::adjust ( double dt ) [virtual]

This tells the object that it should adjust to a new simulation time step width.

Reimplemented from SimObject.

Definition at line 109 of file IzhiNeuron.cpp.

References dt_msec.

Referenced by reset().

int IzhiNeuronBase::advance ( AdvanceInfo const & ai ) [virtual]

Advance the neuron.

Reimplemented from SimObject.

Reimplemented in ExIzhiNeuronBase.

Definition at line 59 of file IzhiNeuron.cpp.

References a, ADVANCEFLAG_HASSPIKED, b, c, clearSynapticInput(), d, dt_msec, factI, Iinject, Inoise, Isyn, SingleOutputSpikeSender::out_port, SpikeOutputPort::setSpike(), u, Vm, Vpeak, and white_noise.

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int IzhiNeuronBase::reset ( double dt ) [virtual]

Reset the Izhi-Neuron.

Reimplemented from SimObject.

Definition at line 119 of file IzhiNeuron.cpp.

References adjust(), clearSynapticInput(), SingleOutputSpikeSender::reset(), u, Vinit, and Vm.

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bool IzhiNeuronBase::refractoryQ ( ) [inline]

Returns true iff the neuron is in its absolute refactory period.

Definition at line 57 of file IzhiNeuron.h.

void IzhiNeuronBase::clearSynapticInput ( void ) [inline, virtual]

Definition at line 103 of file IzhiNeuron.cpp.

References Isyn.

Referenced by ExIzhiNeuronBase::advance(), advance(), and reset().

virtual double IzhiNeuronBase::getManagedDelay ( ) const [inline, virtual]

Reimplemented from SimObject.

Definition at line 83 of file IzhiNeuron.h.

virtual int IzhiNeuronBase::nSpikeInputPorts ( ) const [inline, virtual]

Reimplemented from SimObject.

Definition at line 84 of file IzhiNeuron.h.

virtual int IzhiNeuronBase::nSpikeOutputPorts ( ) const [inline, virtual]

Reimplemented from SimObject.

Definition at line 85 of file IzhiNeuron.h.

virtual int IzhiNeuronBase::nAnalogInputPorts ( ) const [inline, virtual]

Reimplemented from SimObject.

Definition at line 86 of file IzhiNeuron.h.

virtual int IzhiNeuronBase::nAnalogOutputPorts ( ) const [inline, virtual]

Reimplemented from SimObject.

Definition at line 87 of file IzhiNeuron.h.

virtual PortType IzhiNeuronBase::outputPortType ( port_t o ) const [inline, virtual]

Reimplemented from SimObject.

Definition at line 89 of file IzhiNeuron.h.

References SimObject::spiking, and SimObject::undefined.

virtual PortType IzhiNeuronBase::inputPortType ( port_t i ) const [inline, virtual]

Reimplemented from SimObject.

Definition at line 94 of file IzhiNeuron.h.

References SimObject::undefined.

Member Data Documentation

double IzhiNeuronBase::Vpeak

If $V_m$ exceeds the Value of $V_m$ is resetet to d. [units=V; range=(-10,100);].

Definition at line 65 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), advance(), ExIzhiNeuronBase::ExIzhiNeuronBase(), and IzhiNeuronBase().

double IzhiNeuronBase::Vinit

The initial condition for $V_m$ at time $t=0$ . [units=V; range=(-1,1);].

Definition at line 67 of file IzhiNeuron.h.

Referenced by reset().

double IzhiNeuronBase::Inoise

The standard deviation of the noise to be added each integration time constant. [range=(0,1); units=A;].

Definition at line 69 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), and advance().

double IzhiNeuronBase::Iinject

A constant current to be injected into the LIF neuron. [units=A; range=(-1,1);].

Definition at line 71 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), and advance().

double IzhiNeuronBase::a

A constant (0.02, 01) describing the coupling of variable u to Vm; [units=D; range=(0,10);].

Definition at line 75 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), advance(), ExIzhiNeuronBase::ExIzhiNeuronBase(), and IzhiNeuronBase().

double IzhiNeuronBase::b

A constant controlling sensitivity of u. [units=D; range=(0,10);].

Definition at line 77 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), advance(), ExIzhiNeuronBase::ExIzhiNeuronBase(), and IzhiNeuronBase().

double IzhiNeuronBase::c

A constant controlling reset of Vm (1000*Vreset). [units=mV; range=(-1000,1000);].

Definition at line 79 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), advance(), ExIzhiNeuronBase::ExIzhiNeuronBase(), and IzhiNeuronBase().

double IzhiNeuronBase::d

A constant controlling reset of u [units=D; range=(0,10);].

Definition at line 81 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), advance(), ExIzhiNeuronBase::ExIzhiNeuronBase(), and IzhiNeuronBase().

double IzhiNeuronBase::Vm [protected]

The membrane voltage $V_m$ [readonly; units=V;].

Definition at line 101 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), advance(), CbExIzhiNeuron::conductanceInput(), CbIzhiNeuron::conductanceInput(), CbExIzhiNeuron::getVm(), CbIzhiNeuron::getVm(), and reset().

double IzhiNeuronBase::u [protected]

internal variable [readonly; units=V;]

Definition at line 103 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), advance(), and reset().

double IzhiNeuronBase::dt_msec [protected]

The time step [readonly; units=msec;].

Definition at line 105 of file IzhiNeuron.h.

Referenced by adjust(), ExIzhiNeuronBase::advance(), and advance().

ThreadSpecificRandomDistribution< NormalDistribution > IzhiNeuronBase::white_noise [static, protected]

Random number generator for white noise.

Definition at line 109 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), and advance().

int IzhiNeuronBase::noiseType [protected]

noise type (0.,,gaussian Noise, 1...pink noise, 3...Ornstein Uhlenbeck noise) [range=(0,2); units=;]

Definition at line 115 of file IzhiNeuron.h.

double IzhiNeuronBase::Isyn [protected]

Summation point for all synaptic input currents.

Definition at line 117 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), advance(), clearSynapticInput(), CbExIzhiNeuron::conductanceInput(), CbIzhiNeuron::conductanceInput(), CbExIzhiNeuron::currentInput(), ExIzhiNeuron::currentInput(), CbIzhiNeuron::currentInput(), and IzhiNeuron::currentInput().

double IzhiNeuronBase::factI [protected]

Definition at line 120 of file IzhiNeuron.h.

Referenced by ExIzhiNeuronBase::advance(), and advance().

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

/home/tnatschl/PCSIM-Sandbox/pcsim/pcsim/simobjects/IzhiNeuron.h
/home/tnatschl/PCSIM-Sandbox/pcsim/pcsim/simobjects/IzhiNeuron.cpp


Public Member Functions
	IzhiNeuronBase (double a=0.02, double b=0.2, double c=-65.0, double d=8.0, double Vpeak=30.0, double Vinit=-0.06, double Inoise=0.0, double Iinject=0.0, double factI=1.0)
	IzhiNeuronBase (string type, double Vinit=-0.06, double Inoise=0.0, double Iinject=0.0, double factI=1.0)
virtual	~IzhiNeuronBase ()
virtual int	adjust (double dt)
	This tells the object that it should adjust to a new simulation time step width.
virtual int	advance (AdvanceInfo const &)
	Advance the neuron.
virtual int	reset (double dt)
	Reset the Izhi-Neuron.
bool	refractoryQ ()
	Returns true iff the neuron is in its absolute refactory period.
virtual void	clearSynapticInput (void)
virtual double	getManagedDelay () const
virtual int	nSpikeInputPorts () const
virtual int	nSpikeOutputPorts () const
virtual int	nAnalogInputPorts () const
virtual int	nAnalogOutputPorts () const
virtual PortType	outputPortType (port_t o) const
virtual PortType	inputPortType (port_t i) const
Public Attributes
double	Vpeak
	If exceeds the Value of is resetet to d. [units=V; range=(-10,100);].
double	Vinit
	The initial condition for at time . [units=V; range=(-1,1);].
double	Inoise
	The standard deviation of the noise to be added each integration time constant. [range=(0,1); units=A;].
double	Iinject
	A constant current to be injected into the LIF neuron. [units=A; range=(-1,1);].
double	a
	A constant (0.02, 01) describing the coupling of variable u to Vm; [units=D; range=(0,10);].
double	b
	A constant controlling sensitivity of u. [units=D; range=(0,10);].
double	c
	A constant controlling reset of Vm (1000*Vreset). [units=mV; range=(-1000,1000);].
double	d
	A constant controlling reset of u [units=D; range=(0,10);].
Protected Attributes
double	Vm
	The membrane voltage [readonly; units=V;].
double	u
	internal variable [readonly; units=V;]
double	dt_msec
	The time step [readonly; units=msec;].
int	noiseType
	noise type (0.,,gaussian Noise, 1...pink noise, 3...Ornstein Uhlenbeck noise) [range=(0,2); units=;]
double	Isyn
	Summation point for all synaptic input currents.
double	factI
Static Protected Attributes
static ThreadSpecificRandomDistribution < NormalDistribution >	white_noise
	Random number generator for white noise.