Perievent histograms – Multichannel Systems NeuroExplorer User Manual
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2.11. Perievent Histograms
Perievent Histogram shows the conditional probability of a spike at time t0+t on the condition that
there is a reference event at time t0.
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
Histogram time axis minimum in seconds.
XMax
Histogram time axis maximum in seconds
Bin
Bin size in seconds.
Normalization
Histogram units (Counts/Bin, Probability, Spikes/Second or Z-score). 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
.
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
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)).
Overlay Options
Specifies line colors and line styles for overlaid graphs.
Smooth
Option to smooth the histogram after the calculation. See
for details.
Smooth Filter Width
The width of the smooth filter. See
for details.
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