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Analysis Help
Analysis: Raw instantaneous spike frequency vs spike occ.

The instantaneous frequency of action potentials occurring on the waveform selected by the "Spike W.F. #" are displayed by spike occurrence within cycles on the waveform selected by the "Cycle W.F. #". That is, the X-axis is divided into a number of "bins", corresponding to individual spike occurrences in each cycle, then for each spike on the former waveform, the instantaneous frequency (inverse of the interval from the previous spike) is calculated, and plotted on the graph at the position (or spike number) in the current cycle where this spike occurred. For each cycle, the frequencies for all spikes falling into one of these "bins" are displayed, overlaid by data from all other cycles in the range to be analysed. You can also skip spikes, or sample spike occurrences from the end of the cycle, just like for the "W.F. averaging - spike occurrence in cycle" analysis, using the "Spikes to skip" parameter.

No frequency is plotted for the first spike of the first cycle, if no previous spike was found, in the selected range to be analysed, to permit an interval calculation. If the spike trains for the former waveform have been properly set, statistics will be given for activity on this waveform, relative to the above cycles. Also, in this case, frequencies are calculated and plotted only for spikes in the same spike train, and no frequency is plotted for the first spike in each train.

If the "Take interval after spike" option is enabled, the interval to the following spike, rather than the previous one, is calculated. No frequency is plotted for the last spike of the last cycle, if no following spike is found in the selected range. If spike trains have been set, no frequency is plotted for the last spike in each train.


Key sequence  Parameter Initial Value
<Esc>AGASFR  Analysis method  Raw instantaneous spike frequency vs spike occ.
<Esc>SF  Run file  ?
<Esc>SRS  Start of run  0 msec
<Esc>SRE  End of run  2.14748e_08 msec
<Esc>SRD  # of deleted sections  0
<Esc>SCW  Cycle W.F. #  ?
<Esc>Wn<CR>SCV  Cycle crossings  ?
<Esc>SCS  Base cycles on stop time  N
<Esc>SCT  Base cycles on spike trains  N
<Esc>SSWN  Spike W.F. #  ?
<Esc>Wn<CR>SS  W.F. spikes  ?
<Esc>SSWS  Spikes to skip  0
<Esc>SSWR  Reverse spike occurrences  N
<Esc>SMIA  Take interval after spike  N
<Esc>SGB  # bins- graph  100
<Esc>SDSA  Auto scale  Y
<Esc>SGR  Regression degree  0
<Esc>SSWA  Base spike stats. on start  N
<Esc>SDD  Graph description  ""
<Esc>SDM  Main graph title  ""
<Esc>SDGG  Graph type  Adaptive
<Esc>SDGD  Diamond symbol size  5
<Esc>SDGT  Graph tag symbol  ""
<Esc>SDSR  Round out scale bars  Y
<Esc>SDSXS  X scale bars  Y
<Esc>SDSYS  Y scale bars  Y
<Esc>SDSXL  Min X  0
<Esc>SDSXU  Max X  0
<Esc>SDSYL  Min Y  0
<Esc>SDSYU  Max Y  0
<Esc>SDTT  Top title display  Y
<Esc>SDUF  Freq. units  Hz
<Esc>SDUT  Time units  msec


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Copyright © 2017 G. R. Detillieux, Spinal Cord Research Centre, The University of Manitoba.