Table 2.
Comparison of effects from sinusoidal stimulation and stimulus-triggered averaging
| Poststimulus effect | Sinusoidal stimulation effect |
|||
|---|---|---|---|---|
| pE | pI | tEI | Total | |
| n | n | n | n | |
| PStF | 488 | 79 | 332 | 899 |
| PStS | 21 | 34 | 20 | 75 |
| PStF/PStS | 64 | 17 | 51 | 132 |
| Weak or no PStE | 129 | 157 | 91 | 377 |
| Total | 702 | 287 | 494 | 1493 |
Note: Values are the total number of sinusoidal modulation effects across all stimulation sites corresponding to different types of poststimulus effects obtained from the same sites. Stimulus intensities used were 10, 15, and 30 µA. EMG modulation effects were considered significant and included if the envelope of the EMG record surpassed ±2SD above or below the mean of the baseline EMG activity.
pE: predominantly excitatory; pI: predominantly inhibitory; tEI: initially excitatory transitioning to inhibitory; n: number of measurements.