Table II.
Talairach locations of peak activations in group averaged ER‐SAM images
| Brain area | Right index finger | pseudo‐Z | Left index finger | pseudo‐Z |
|---|---|---|---|---|
| x, y, z | x, y, z | |||
| MF (−50 ms) | ||||
| Left precentral gyrus | −33, −15, 59 | 2.51 | −30, −17, 60 | 1.27 |
| Right precentral gyrus | 39, −21, 56 | 1.57 | 36, −17, 60 | 3.72 |
| Left inferior parietal cortex | −45, −19, 37 | 1.66 | −45, −21, 43 | 1.32 |
| Supplementary motor area | 0, 12, 66 | 1.09 | ||
| Left premotor area | −33, 17, 49 | 1.46 | ||
| Right premotor area | 45, 10, 35 | 1.22 | 39, 16, 24 | 1.05 |
| MEFI (40 ms)** | ||||
| Left postcentral gyrus | −38, −22, 56 | 6.21 | ||
| Right postcentral gyrus | 40, −23, 59 | 4.41 |
Mean locations and amplitudes of the six largest peak activations in the group averaged event‐related SAM images preceding (MF) and following (MEFI) onset of left and right index finger movements. Talairach coordinates are presented (mm).
**
For MEFI only the location of the largest peak in the contralateral hemisphere is listed, showing a posterior shift in peak location of the precentral gyrus sources. Peaks with pseudo‐Z values < 1.0 were excluded.