Stimulus

class Stimulus

Emulates the background noise in the brain by firing messages to the cells on its list

Public Fields
int id: Index into the Arrays structure to the Stimulus object that this object was created from
Stimulus* next: Pointer to the next Stimulus Object
Stimulus* prev: Pointer to the previous Stimulus Object
void* II: Info used by input stims
Random* RN: Random number generator for this stimulus object
int nFreqs: Number of frequencies (items) in input data
int CellsPerFreq: Number of cells to receive each frequency
int CellsOnNode: Number of receiving cells that are on this node
int nDataRows: Number of rows in data - 1 for INPUT
float* Data: Pointer to the data as it is read in
char** ThingPtrs: Pointers to the objects that will receive stim
int* DataIdx: Index of data corresponding to each object
int MODE: CURRENT or VOLTAGE
int PATTERN: LINEAR, SINE, ONGOING, PULSE, NOISE
int TIMING: EXACT, URAND, POISSON
double AMP_Start: Intial AMP value when starting
double AMP_End: Target AMP value for end
int iTime: Currently active time interval
int nTimes: Number of time intervals
int* TStart: Beginning time intervals
int* TStop: Ending time intervals
int nFire: Number of cells from list that will get stim in window
int* WillFire: List of cells that will fire within window
int SpikeTicks: Ticks per SpikeProb window
int FireTicks: Ticks in firing window
int nFireWin: Number of firing windows in spike window
int PulseTicks: Number of ticks pulse will fire in window
int iRow: row of Data being used for current window
int iFwTick: Current tick within firing window
int iSpTick: Current tick within spike window
int iPTicks: Current tick within pulse width
int iFireWin: Firing window counter
int Width: the width of the pulse in ticks
bool Active: true if TimeStep is within one of the specified time intervals
int Time_Elapsed: Used to determin width and values to know how far we are into the stimulus
double PulseAmp: currently used AMP value, starts at AMP_Start
double AMP_Increment: for variable amplitudes, only, otehrwise zero
double Theta: For sine function, the elapsed angle (mod 360)
double Phase: Starting angle
double dTheta: Increment added each tick
: void StimulusStateSave( FILE * );

Public Methods
void (Stimulus::*Func)(int): Function pointer to the function which the stimulus will execute
Stimulus(T_STIMULUS *, T_STINJECT *, Random *): Constructor used to build stimulus from input file
~Stimulus(): Destructor
int GetInputCells(T_STINJECT *): Determine which cells on this node will receive the stimulus and set up data areas to point to them
int GetCells(T_STINJECT *): Get cells on this node the will receive the stimulus
void ResetStim(): Resets Stimulus to the beginning so that it may be reused
bool DoStimulus(int): If within active time period, call appropriate routine to perform stimulus
void FileStim(int): Perform file based stimuls
void InputStim(int): Perform input stimulus
void OngoingStimulus(int): Perform ongoing stimulus
void NoiseStimulus(int): Perform noise stimulus
void PulseStimulus(int): Perform pulse stimulus
void LinearStimulus(int): Perform linear stimulus
void SineStimulus(int): Perform sine stimulus
void CalculateAMPIncrement(): Calculate the change in amp for a given timestep
void EmptyFunc(int): default function to call when perfroming stimulus
void Error1(T_STINJECT *): Error occured where no cells were found for the stimulus inject
void Error2(T_STINJECT *, int): Error occured where number of cells doesn't match freq rows * cells per freq
void PrintCellList(): Helper function to display cells list; not implemented (code is commented out)

Documentation

Emulates the background noise in the brain by firing messages to the cells on its list. The background noises are essentially messages that are coming into the brain from other parts of a brain - that are not modeled here (i.e. visual, olfactory). The stimulus sets are created by fourier transforms, sine waves, and chaos patterns. This object is owned by the Brain.