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2.15. Perievent Rasters

This analysis shows the timestamps of the selected variable relative to the timestamps of the

reference variable.

Parameters

Parameter Description

Reference Type Specifies if the analysis will use a single or multiple reference events.

Reference Specifies a reference neuron or event (or a group of reference neurons or

events).

XMin Time axis minimum in seconds.

XMax Time axis maximum in seconds

Markers An option to display additional events (as markers - triangles, squares,

etc.) in the perievent raster.

Background Intervals An option to draw intervals in the raster background.

Trial Order This option allows you to specify how the raster lines are drawn. The raster

lines (corresponding to reference events) can be drawn in the order of

reference events (with the first event on top, the last at the bottom of the

perievent raster), or in the reverse order (the first event at the bottom of the

raster display, the last event at the top). This option is ignored if Sort trials

parameter is not None.

Sort trials An option to sort raster lines.

By default, the raster lines (corresponding to reference events) are drawn

in the order specified by the Trial Order parameter. This option allows you

to display reference events in a different order. For example, in behavioral

experiments, you can sort the trials according to the latency of the

response.

Sort event Specifies how to identify the timestamps (in Sort ref. variable) that will be

used in sorting.

Sort ref. Specifies event variable that will be used to sort trials.

Histogram An option to draw a histogram.

Bin Histogram bin size in seconds.

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

below.

No Selfcount An option not to count reference events if the target event is the same as

the reference event (prevents a histogram to have a huge peak at zero

when calculating PSTH versus itself).

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.

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