Table 1.
Pulse configurations used in Experiment 2
| State | CCS40 | CS10 | CS2 | TS |
|---|---|---|---|---|
| 2A | – | – | – | 1 mV |
| 2B | – | – | 0.8 RMT | 1 mV |
| 2C | – | 0.8 RMT | – | 1 mV |
| 2D | + | – | – | 1 mV |
| 2E | – | – | – | 1mVCCS40 |
| 2F | – | – | 0.8 RMT | 1mVCCS40 |
| 2G | – | 0.8 RMT | – | 1mVCCS40 |
| 2H | + | – | – | 1mVCCS40 |
| 2I | + | – | 0.8 RMT | 1mVCCS40 |
| 2J | + | 0.8 RMT | – | 1mVCCS40 |
Experiment 2 investigated the effect of long interhemispheric inhibition (LIHI) on short interval intracortical inhibition (SICI) and intracortical facilitation (ICF). In conditions 2A to 2D, the effects of SICI, ICF and SAI on 1 mV test motor evoked potential (MEP) were assessed whereas in conditions 2E to 2J, test stimulus intensity was increased in order to produce 1 mV test MEP in the presence of CCS40 (1mVCCS40). CS2, conditioning stimulus given 2 ms prior to TS; CS10, conditioning stimulus given 10 ms prior to TS; CCS40, contra lateral hemisphere stimulation given 40 ms prior to test TS; RMT, resting motor threshold; TS, test stimulus.