Example Components
There are several things to look at when determining whether or not to reject a component. None of these are hard-and-fast rules; they are guidelines. You need to look at all of these plots together and make a decision. For more examples of good components and for more specific examples of non-neural components, look at the SASICA powerpoint.
SASICA PLOTS - see the SASICA powerpoint for info -->
What's What
SASICA Plots
Color Scale
Headmaps
These are a few good headmaps. Look at the SASICA paper and powerpoint for more information.
Power Spectra
A peak around 10 Hz is good.
VERY GOOD
GOOD
OKAY - USE OTHER PLOTS TO DECIDE
BAD
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Activity and Waveform Plots
Look for vertical stripes in the activity plot that correspond to the waveform plot.
Red is positive, blue is negative.
Also look at the units on the color scale. These can serve as a guideline. Neural components are
around 4 to 8. Good components can be up to 12 or 20. Anything in the 35 to 70 range is probably noise.
EXCELLENT EXAMPLES:
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Color Scale
GOOD EXAMPLES
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MIXED NEURAL & NOSIE
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SASICA Plots
See SASICA.ppt for info on the SASICA graphs