event rasters

What it is

A GUI for visualizing the detailed responses of individual neurons.

How to run it

First add the spikes repository to your path, then execute "launchRasterViewer" from this repository. Using the prompts, choose the folder that contains the downloaded data, then choose a session and a probe, and the raster viewer will load.

How to use it

The viewer works best maximized on a screen with high resolution (e.g. 4k).

The controls are as follows:

• up/down arrows to switch between clusters
• left/right arrows to increase/decrease smoothing size
• h to hide/unhide behavioral icons on the rasters
• t/r to increase/decrease raster tick sizes
• c to go to a particular cluster by number
• click on anatomy at left to jump to cluster nearest there
• l to view the legend

What the plots mean

In the main plots, black tick marks indicate times of spikes and colorful icons indicate behavioral events according to the legend below.

To clarify, triangles are the detected times of actual movement onsets, whereas x's are the times at which a response is registered by the behavioral software (when this is a left or right response, this will only be registered some time after the actual movement has started).

When a visual stimulus is shown on each side at the same time, the two corresponding visual icons are superimposed (the asterisk fits inside the circle).

The vertical plot at far left is an image of the probe layout, where each dot is one site location and the size of the dot corresponds to the relative amplitude of this neuron's action potential on that site. Text labels on this plot are acronyms of brain regions.

The next column, from top to bottom, contains:

• black lines: Plot of the neuron's waveform on the peak channel and surrounding channels. The snippets are about 2 ms long.
• red/blue pair of images: Another plot of the waveform, this one with x-axis time and y-axis probe depth, where color represents voltage. These are interpolated across space, and two separate interpolations are done at the left and right sides of the face of the probe. If this plot doesn't make sense, don't worry about it.
• Autocorrelogram on linear time axis up to 100 ms. The vertical dashed line is at 2 ms, and the horizontal dashed line is at the asymptotic ACG value.
• Same autocorrelogram but on a log time axis out to 1000 ms.