Brandon Has a P300 ... and Lives to Tell

For fun today in the lab, we decided to see whether we could measure EEG activity using our Coulbourn Instruments LabLinc V system.

So poor Brandon Nutting's forehead got scrubbed, we attached some sensors, and collected some data. We don't have a cap yet, so we were limited to the forehead.

Here you see Event Related Potentials to a 100 ms 70 dB audio tone with a 10 ms rise time.

There were 49 trials.

You can see a recognizable P300 component about 300 ms after stimulus offset. You can also see a N100 in the Fp1 component.

The black (F7) and red (F8) locations were collected at the sides of his forehead, and the blue (Fp1) location was collected at the left-center of the forehead.

You can check out the locations of the International 10-20 System here.

Thanks to Justin Keene and Wes Wise for helping this experiment today. In under three hours, we took the equipment out of the box, wrote the collection program, collected the data, reduced the data in MATLAB, and plotted it. Not bad for a Sunday afternoon.

(And, yes, Brandon and I are both wearing Indiana shirts. Go Hoosiers!)