Figure 2.
Preliminary results from a millisecond latency EEG-TMS set-up. (A) Simplified implementation of a closed-loop brain-state dependent brain-stimulation set-up consisting of EEG stage, real-time digital signal processing stage, and a triggered stimulation stage. (B) Raw EEG traces recorded from electrode C3 in the period before a TMS 100 Hz triplet pulse that is triggered by a real-time system based on the preceding 300 ms of EEG data. The system can be configured to trigger the stimulation either at the trough (top trace) or at the peak (bottom trace) of spontaneous alpha activity recorded by EEG over motor cortex.