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Analysis Help
Analysis: Raw instantaneous spike frequency vs step cycle


The instantaneous frequency of action potentials occurring on the waveform selected by the "Spike W.F. #" are displayed with respect to cycles on the waveform selected by the "Cycle W.F. #". That is, for each spike on the former waveform, the instantaneous frequency (the inverse of the interval from the previous spike) is calculated, and plotted on the graph at the position in the current cycle where this spike occurred. 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.

For this graph, and for the similar raw inter-spike interval graph, when you disable normalization and "Auto scale", you can set the lower bound and upper bound of the X axis to go beyond the start and end of each cycle and the program will display the points occurring in those areas (in the previous or next cycle). This feature will not work for the averaged graphs.

 

Key sequence  Parameter Initial Value
<Esc>AGAVFR  Analysis method  Raw instantaneous spike frequency vs step cycle
<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>SMIA  Take interval after spike  N
<Esc>SDSA  Auto scale  Y
<Esc>SGN  Normalization  Y
<Esc>SCP  Percent of cycle active  0
<Esc>SGC  Cycles on graph  2
<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.