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2.9. Interspike Interval Histograms

Interspike interval histogram shows the conditional probability of a first spike at time t0+t after a spike

at time t0.

Parameters

Parameter Description

Min Interval Minimum interspike interval in seconds.

Max Interval Maximum interspike interval in seconds.

Bin Bin size in seconds.

Normalization Histogram units (Counts/Bin, Probability or Spikes/Second). See Algorithm

below.

Log Bins and X Axis An option to use Log10 interval scale (see Algorithm below for details).

Bins per decade A bin size option if Log option is selected (see Algorithm below for details).

Y Axis Limit (%) An option to "zoom in" small histogram values. This parameter specifies

the maximum of Y axis. If it is 100%, the Y axis maximum equals to the

maximum bin value. If it is, for example, 10%, Y axis maximum is set to

10% of the bin max and the small bin values have better visibility.

Select Data If Select Data is From Time Range, only the data from the specified (by

Select Data From and Select Data To parameters) time range will be used

in analysis. See also Data Selection Options.

Select Data From Start of the time range in seconds.

Select Data To End of the time range in seconds.

Int. filter type Specifies if the analysis will use a single or multiple interval filters.

Interval filter Specifies the interval filter(s) that will be used to preselect data before

analysis. See also Data Selection Options.

Create filter on-the-fly Specifies if a temporary interval filter needs to be created (and used to

preselect data).

Create filter around Specifies an event that will be used to create a temporary filter.

Start offset Offset (in seconds, relative to the event specified in Create filter around

parameter) for the start of interval for the temporary filter.

End offset Offset (in seconds, relative to the event specified in Create filter around

parameter) for the end of interval for the temporary filter.

Fix overlaps An option to automatically merge the overlapping intervals in the temporary

filter.

Overlay Graphs An option to draw several histograms in each graph. This option requires

that Int. filter type specifies that multiple interval filters will be used (either

Table (row) or Table (col)).

Smooth Option to smooth the histogram after the calculation. See Post-Processing

Options for details.

Smooth Filter Width The width of the smooth filter. See Post-Processing Options for details.

Add to Results / Bin left An option to add an additional vector (containing a left edge of each bin) to

the matrix of numerical results.

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Multichannel-systems NeuroExplorer Manual de usuario Pagina 55