Table 1.
Frequency and amplitude of D- and I-wave generation from different cortical areas
| Cortical stimulus site | Number of sites generating D waves (percentage) | Number of sites generating I waves (percentage) | Number of sites generating neither D nor I waves (percentage) | Amplitude of D wave (mean ± SEM, μV) | Amplitude of I1 wave (mean ± SEM, μV) |
|---|---|---|---|---|---|
| New M1 | 14/18 (78%) | 15/18 (83%) | 3/18 (17%) | 31.9 ± 9.5 | 27.5 ± 9.2 |
| Border region | 5/6 (83%) | 5/6 (83%) | 1/6 (17%) | 7.5 ± 3.4 | 4.0 ± 1.3 |
| Area 3a | 2/10 (20%) | 2/10 (20%) | 8/10 (80%) | 5.8 ± 2.3 | 2.4 ± 1.3 |
| Old M1 | 10/14 (71%) | 10/14 (71%) | 4/14 (29%) | 22.4 ± 9.4 | 28.5 ± 12.8 |