Correlate voltage distributions with anatomical features.
One or more events can be selectively averaged, and standard deviation or even/odd error traces illustrate the reliability of the average. Use electrode maps other than the standard 10-20, and create new electrode maps using bitmap templates for easy electrode placement. Display a voltage plot transparently over a depth electrode placement photo (scanned bitmap) for correlation with anatomical features.

Monitor patient state or drug effects with spectral changes.
Display power spectrum by channel or by band. Create frequency band tables with up to eight bands and distinct colors for each band. Animate the topograph plots to see spatial changes in frequency content over time. Illustrate hemisphere differences with topograph symmetry plots. Show the pairwise correlation and lag between any number of channels simultaneously. Animate the correlation plot to see the onset of correlated activity. Watch for patient state changes with online CSA plots. Control the FFT calculation via the points per window, windows per epoch, overlapping windows, and smoothing. Remove artifacts from the spectral calculation by using multiple hand-selected segments.

Prism uses Insight and supports most major DEEG systems.
These two Insight PlugIns integrate seamlessly with Insight, offering superior analytical capabilities on the computer you already own. Both PlugIns allow you to export data to other programs for dipole analysis, etc.

Average Multiple Events to Remove Random Influences. Select one or more events from the event list (far right on main window). Reveal hidden details with control over every aspect of the display - electrode map, montage, reference electrode, filters, duration of average, display of error traces, interpolation method, and color palette.

See the Spatial Propagation of an Event over Time. Display the average tracings and an array of voltage maps to illustrate the spatial propagation of the averaged event over time. Click the right mouse button in the display to change the number of rows and columns, the time between plots, and the contour palette.

See it Your Way. Choose the chart type: average spectrum, hidden line CSA, contour CSA, topograph or, correlation and lag. Choose the channels to display, their plot size and layout. Choose the electrode map and frequency bands to plot. Choose the FFT parameters. Choose the start time and duration or use multiple artifact-free segments. Choose the high, low and notch filters to focus on frequencies of interest.

Hardware / Software Requirements

Minimum: Intel 486DX, Windows 95/98/ME/NT/2000/XP, 32 MB RAM, mouse, 256 color display or better.

Recommended: Pentium II, AMD K6-2 or better, Windows 98/ME/NT/2000/XP, 64MB or better, mouse, 256 color display or better.