Multichannel-systems NeuroExplorer Manual do Utilizador descarregar pdf (Página 95)

2.26. PSTH Versus Time

This analysis shows the dynamics of the perievent histogram over time. It calculates multiple PST

histograms using a "sliding window" in time. Each histogram is shown as a vertical stripe with colors

representing the bin counts. Horizontal axis represents the position of the sliding window in time.

Parameters

Parameter Description

Reference Specifies a reference neuron or event.

XMinPSTH Histogram time minimum in seconds.

XMaxPSTH Histogram time maximum in seconds

BinPSTH Histogram bin size in seconds.

Start Start of the first sliding window in seconds.

Duration Duration of the sliding window in seconds.

Shift How much sliding window is shifted each time.

Number of shifts The number of sliding windows to be used.

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).

Sliding window axis

direction

Direction of the sliding window axis (horizontal or vertical).

Sliding window axis

alignment

Allows to specify what values are shown in the sliding window axis. There

are two options: Start of Window and Center of Window.

Suppose your data has the strongest correlation at 50 seconds. This

means that the window that has 50 seconds as its center will show the

highest PST values. If the window width is 20 seconds, it will be the

window [40,60]. If you are using 'Start of window' option, you will see the

peak at 40 instead of 50 seconds. However, with 'Center of window' option,

the peak will be at 50 seconds.

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.

Send to Matlab An option to send the matrix of numerical results to Matlab. See also

Matlab Options.

Matrix Name Specifies the name of the results matrix in Matlab workspace.

Matlab command Specifies a Matlab command that is executed after the numerical results

are sent to Matlab.

Send to Excel An option to send numerical results or summary of numerical results to

Excel. See also Excel Options.

Sheet Name The name of the worksheet in Excel where to copy the numerical results.

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