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Analysis Help
Analysis: Raw instantaneous spike frequency vs W.F. level


The instantaneous frequencies of action potentials occurring on the waveform selected by the "Spike W.F. #" are displayed with respect to the corresponding levels on the waveform selected by the "Amplitude W.F. #". That is, 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 representing the level on the latter waveform. The parameters "W.F. amplitude delay" and "W.F. amplitude window" indicate a range of points, relative to the point where the action potential occurred, used to obtain a level reading on this latter waveform. The range of voltage levels can be restricted to a smaller range, by setting the parameters "Min W.F. amplitude" and "Max W.F. amplitude". Only action potentials whose associated waveform level readings stay within these bounds will be included in the graph.

No frequency is plotted for the first spike in the selected range to be analysed, since a previous spike is needed to permit an interval calculation. If the spike trains for the former waveform have been properly set, 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 in the range to be analysed, nor for the last spike in each train, when spike trains are set.

 

Key sequence  Parameter Initial Value
<Esc>AGAWFR  Analysis method  Raw instantaneous spike frequency vs W.F. level
<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>SLTA  Active cycle phase only  N
<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>SLWN  Amplitude W.F. #  0
<Esc>SLWRL  Min W.F. amplitude  -80000 mV
<Esc>SLWRU  Max W.F. amplitude  79997.6 mV
<Esc>SLWD  W.F. amplitude delay  0 msec
<Esc>SLWW  W.F. amplitude window  0.1 msec
<Esc>SSWN  Spike W.F. #  ?
<Esc>Wn<CR>SS  W.F. spikes  ?
<Esc>SMIA  Take interval after spike  N
<Esc>SLWP  W.F. ampl. as % of max  N
<Esc>SLWF  Fixed W.F. level bins  N
<Esc>SGR  Regression degree  0
<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>SDSA  Auto scale  Y
<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>SDUL  Sample units  mV

 


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