Table 3.
Number of different measures of motor cortex excitability with increases, no changes (null findings), and decreases with respect to the different stimulation sites.
| Resting motor threshold | Motor evoked potential | Short-interval intracortical inhibition | Intracortical facilitation | Cortical silent period | ||
|---|---|---|---|---|---|---|
| Frontal | ↑ | 3 | 3 | 2 | 0 | 2 |
| ↔ | 9 | 1 | 1 | 3 | 1 | |
| ↓ | 3 | 1 | 0 | 0 | 1 | |
| Temporal | ↑ | 0 | 0 | 1 | 1 | 3 |
| ↔ | 2 | 0 | 2 | 3 | 1 | |
| ↓ | 1 | 1 | 1 | 0 | 0 | |
| Cerebellum | ↑ | 0 | 4 | 1 | 2 | 0 |
| ↔ | 4 | 0 | 4 | 3 | 1 | |
| ↓ | 0 | 2 | 1 | 2 | 0 | |
| Frontal + temporal + cerebellum (sum) | ↑ | 3 | 7 | 4 | 3 | 5 |
| ↔ | 15 | 1 | 7 | 9 | 3 | |
| ↓ | 4 | 4 | 2 | 2 | 1 |
Please note that numbers are not consistent with numbers of studies as several studies used several stimulation protocols.
↑, increases; ↔, no changes; ↓, decreases over the course of the repetitive transcranial magnetic stimulation.