Table 3. Detailed representation of BOLD effects and comparison between 32/64 channel EEG.
| positive BOLD | negative BOLD | ||||||
|---|---|---|---|---|---|---|---|
| Spike topography | 32 electrodes | Comparison 32/64 | 64 electrodes | 32 electrodes | Comparison 32/64 | 64 electrodes | |
| 1 | TP right | + | = | + | − | − | |
| T right | + | = | + | − | − | ||
| 2 | Fp right | + | = | + | + | = | + |
| 3 | CP right | − | − | − | − | ||
| F left | + | = | + | − | − | ||
| 4 | Fp right | + | = | + | − | − | |
| C left | − | − | + | = | + | ||
| Fp right | + | = | + | − | − | ||
| 5 | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. |
| 6 | C left | + | = | + | − | − | |
| TP left | + | = | + | − | − | ||
| FT left | + | < | + | − | − | ||
| C left | + | = | + | − | − | ||
| 7 | T left | − | − | − | − | ||
| 8 | Fp right | + | = | + | − | − | |
| PO central | + | = | + | − | − | ||
| 9 | F left | − | − | + | = | + | |
| PO central | − | − | + | = | + | ||
| TP left | + | = | + | − | − | ||
| 10 | F left | − | − | − | − | ||
| TP left | + | = | + | − | − | ||
| TP right | − | < | + | − | − | ||
| 11 | FT right | + | < | + | − | − | |
| 12 | FT left | − | − | + | > | − | |
| Fp left | − | − | + | = | + | ||
| 13 | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. |
| 14 | F left | − | − | − | < | + | |
| 15 | FT right | − | − | + | < | + | |
| TP left | + | = | + | − | − | ||
| P rigth | − | − | − | − | |||
| 16 | Fp central | + | < | + | − | − | |
| F right | + | = | + | − | − | ||
| 17 | F left | − | − | − | − | ||
| FT left | − | − | − | − | |||
| Summary | 18 | 4 (0/4) | 19 | 7 | 3 (1/2) | 7 | |
C, central; CP, centroparietal; F, frontal; FC, frontocentral; FP, frontoparietal; FT, frontotemporal; n.a., not available; P, parietal; PO, parietooccipital; T, temporal; TP, temporoparietal; +, concordance between BOLD and spike topography; -, no concordance between BOLD and spike topography; <, predominance of the 64-channel-EEG; >, predominance of the 32-channel EEG; = or free field, there was no difference between the 32- and the 64-channel map.