SpikeViewer: Display spikes on up to 4 independent channels

Detection

Spikes are detected on the given {probe, channel} when the voltage crosses from above to below the given threshold (negative microvolts) and stays below threshold for at least 3 consecutive samples.

Spikes are each 64 samples long.

Up to 32 time-stamped spikes at a time are maintained in a FIFO buffer.

New spikes replace the oldest spikes. Each spike is retained no longer than 30 seconds after it was detected.

Waveforms

Individual spikes are displayed (yellow) and are used to calculate their mean waveform (green) and average spike rate (blue bar on a log scale).

Spike waveforms are aligned to their minima.

The vertical full-scale voltage is set by the yscl spinner control in microvolts. The baseline (y-axis) is adjusted automatically.

Showing the window

• Open window and apply last settings with menu item: Window/SpikeViewer...

Picking channels (Also opens window)

• Right-click on ShankViewer site; select SpikeViewer N from popup menu.

• Right-click on Graph window trace; select SpikeViewer N from popup menu.

• Use the probe and channel spinners for that viewer.

fin