AnalogPointNeuron Class Reference

This class implements a neuron which just adds up all its inputs (synapses and analog messages) in a linear fashion. More...

#include <AnalogPointNeuron.h>

Inheritance diagram for AnalogPointNeuron:

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Collaboration diagram for AnalogPointNeuron:

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List of all members.

Public Member Functions

AnalogPointNeuron ()

virtual ~AnalogPointNeuron ()

virtual double getAnalogOutput (analog_port_id_t port=0) const

Return the analog value currently associated with the given port.

virtual void setAnalogInput (double i, analog_port_id_t port=0)

Analog input to given port.

virtual int advance (AdvanceInfo const &)

Calculate the next state and output/propagate the result to succesors/outgoing objects.

virtual int reset (double dt)

Called at the beginning of a simulation at t=0.

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

virtual void clearSynapticInput (void)

virtual void currentInput (double i)

virtual void conductanceInput (double g, double Erev)

Public Attributes

double Vm

The analog output (potential) of this neuron [readonly; units=V;].

double Inoise

The noise of analog neurons [readwrite; units=A^2;].

double Iinject

Constant current injection [readwrite; units=A^2;].

double Rm

The membrane resistance.

Protected Attributes

double Isyn

double Gsyn

Static Protected Attributes

static
ThreadSpecificRandomDistribution
< NormalDistribution > noise

Random number generator for the noise.

Detailed Description

This class implements a neuron which just adds up all its inputs (synapses and analog messages) in a linear fashion.

This class is inteden to be used as the base class for all "artificial" analog neuron types.

If there are no Conductance based synapses the output $Vm$ is given by

$Vm = Rm * ( Isyn + Iinject + noise )$

If there are conductance based synapses the output $Vm$ is given by

$Vm = ( Isyn + Iinject + noise ) / ( Gsyn + 1 / Rm )$

$fIsyn $is the total synaptic input \$fGsyn$ is the total amount of conductance supplied by the conductance based synapses $Iinject$ is some constant base current injection $noise$ is a gaussian random variable with a standard deviation of Inoise $Rm$ is the membrane resistance (which acts just as a scaling factor in this case

Definition at line 26 of file AnalogPointNeuron.h.

Constructor & Destructor Documentation

AnalogPointNeuron::AnalogPointNeuron ( )

Definition at line 6 of file AnalogPointNeuron.cpp.

AnalogPointNeuron::~AnalogPointNeuron ( ) [virtual]

Definition at line 10 of file AnalogPointNeuron.cpp.

Member Function Documentation

virtual double AnalogPointNeuron::getAnalogOutput ( analog_port_id_t port = 0 ) const [inline, virtual]

Return the analog value currently associated with the given port.

Reimplemented from SimObject.

Definition at line 44 of file AnalogPointNeuron.h.

References Vm.

virtual void AnalogPointNeuron::setAnalogInput	(	double	value,
		analog_port_id_t	port = `0`
	)			`[inline, virtual]`

Analog input to given port.

Reimplemented from SimObject.

Definition at line 49 of file AnalogPointNeuron.h.

References Isyn.

virtual int AnalogPointNeuron::advance ( AdvanceInfo const & ) [inline, virtual]

Calculate the next state and output/propagate the result to succesors/outgoing objects.

The return value of advance contains several bits of information which can be decoded with the bit masks ADVANCEFLAG_* like ADVANCEFLAG_HASSPIKED and ADVANCEFLAG_DEACTIVATE.

Reimplemented from SimObject.

Definition at line 54 of file AnalogPointNeuron.h.

References clearSynapticInput(), Gsyn, Iinject, Inoise, Isyn, noise, Rm, and Vm.

Referenced by reset().

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virtual int AnalogPointNeuron::reset ( double dt ) [inline, virtual]

Called at the beginning of a simulation at t=0.

Reimplemented from SimObject.

Definition at line 66 of file AnalogPointNeuron.h.

References advance(), clearSynapticInput(), noise, Time::sec(), and ThreadSpecificRandomDistribution< Dist >::set().

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

Reimplemented from SimObject.

Definition at line 74 of file AnalogPointNeuron.h.

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

Reimplemented from SimObject.

Definition at line 75 of file AnalogPointNeuron.h.

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

Reimplemented from SimObject.

Definition at line 76 of file AnalogPointNeuron.h.

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

Reimplemented from SimObject.

Definition at line 77 of file AnalogPointNeuron.h.

References MAX_PORT_NUMBER.

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

Reimplemented from SimObject.

Definition at line 78 of file AnalogPointNeuron.h.

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

Reimplemented from SimObject.

Definition at line 80 of file AnalogPointNeuron.h.

References SimObject::analog, and SimObject::undefined.

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

Reimplemented from SimObject.

Definition at line 85 of file AnalogPointNeuron.h.

References SimObject::analog.

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

Definition at line 104 of file AnalogPointNeuron.h.

References Gsyn, and Isyn.

Referenced by advance(), and reset().

void AnalogPointNeuron::currentInput ( double i ) [inline, virtual]

Reimplemented from CurrentInputTarget.

Definition at line 109 of file AnalogPointNeuron.h.

References Isyn.

void AnalogPointNeuron::conductanceInput	(	double	g,
		double	Erev
	)			`[inline, virtual]`

Reimplemented from ConductanceInputTarget.

Definition at line 114 of file AnalogPointNeuron.h.

References Gsyn, and Isyn.

Member Data Documentation

double AnalogPointNeuron::Vm

The analog output (potential) of this neuron [readonly; units=V;].

Definition at line 33 of file AnalogPointNeuron.h.

Referenced by advance(), and getAnalogOutput().

double AnalogPointNeuron::Inoise

The noise of analog neurons [readwrite; units=A^2;].

Definition at line 36 of file AnalogPointNeuron.h.

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

double AnalogPointNeuron::Iinject

Constant current injection [readwrite; units=A^2;].

Definition at line 39 of file AnalogPointNeuron.h.

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

double AnalogPointNeuron::Rm

The membrane resistance.

Definition at line 42 of file AnalogPointNeuron.h.

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

double AnalogPointNeuron::Isyn [protected]

Definition at line 96 of file AnalogPointNeuron.h.

Referenced by advance(), clearSynapticInput(), conductanceInput(), currentInput(), and setAnalogInput().

double AnalogPointNeuron::Gsyn [protected]

Definition at line 97 of file AnalogPointNeuron.h.

Referenced by advance(), clearSynapticInput(), and conductanceInput().

ThreadSpecificRandomDistribution< NormalDistribution > AnalogPointNeuron::noise [static, protected]

Random number generator for the noise.

Definition at line 100 of file AnalogPointNeuron.h.

Referenced by advance(), and reset().

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

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


Public Member Functions
	AnalogPointNeuron ()
virtual	~AnalogPointNeuron ()
virtual double	getAnalogOutput (analog_port_id_t port=0) const
	Return the analog value currently associated with the given port.
virtual void	setAnalogInput (double i, analog_port_id_t port=0)
	Analog input to given port.
virtual int	advance (AdvanceInfo const &)
	Calculate the next state and output/propagate the result to succesors/outgoing objects.
virtual int	reset (double dt)
	Called at the beginning of a simulation at t=0.
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
virtual void	clearSynapticInput (void)
virtual void	currentInput (double i)
virtual void	conductanceInput (double g, double Erev)
Public Attributes
double	Vm
	The analog output (potential) of this neuron [readonly; units=V;].
double	Inoise
	The noise of analog neurons [readwrite; units=A^2;].
double	Iinject
	Constant current injection [readwrite; units=A^2;].
double	Rm
	The membrane resistance.
Protected Attributes
double	Isyn
double	Gsyn
Static Protected Attributes
static ThreadSpecificRandomDistribution < NormalDistribution >	noise
	Random number generator for the noise.