Table 2.
Summary of results from hypothesis-driven analyses conducted on 8 ms-IPI Experiment 1 and control Experiment 2 (IPI of 500 ms)
| Expt 1 (IPI 8 ms) | Expt 2 (IPI 500 ms) | Expt 1 vs Expt 2 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PMv-M1 | AIP-PMv | pSPL-PMd | PMd-M1 | PMv-M1 | AIP-PMv | pSPL-PMd | PMd-M1 | PMv-M1 | AIP-PMv | pSPL-PMd | PMd-M1 | ||
| Functional connectivity (fc) | grasp | t(13) = −2.59; p = 0.023* | t(13) = 0.94; p = 0.36 | F(1,26) = 4.64; p = 0.041* | |||||||||
| rest | t(14) = −0.07; p = 0.94 | t(14) = 0.07; p = 0.95 | n.a. | ||||||||||
| partial correlation fc | grasp | t(13) = −3.72; p = 0.003* | n.s. | n.s. | n.s. | t(13) = 1.00; p = 0.34 | n.s. | n.s. | n.s. | F(1,26) = 7.76; p = 0.011* | n.s. | n.s. | n.s. |
| rest | t(14) = −0.07; p = 0.95 | t(14) = −2.50; p = 0.025* | t(14) = 2.22; p = 0.04* | t(14) = 2.84; p = 0.013* | t(14) = −0.39; p = 0.70 | t(14) = 1.08; p = 0.30 | t(14) = −1.24; p = 0.24 | t(14) = 0.47; p = 0.65 | n.a. | F(1,28) = 7.15; p = 0.012* | F(1,28) = 5.29; p = 0.029* | F(1,28) = 5.92; p = 0.08 | |
| Psycho-physiological interaction (PPI) | grasp | t(13) = −4.78; p = 0.0004* | t(13) = 0.98; p = 0.35 | F(1,26) = 6.92; p = 0.014* | |||||||||
| rest | t(14) = 0.08; p = 0.93 | t(14) = 0.20; p = 0.85 | n.a. | ||||||||||
| multiple regression PPI | grasp | t(13) = −2.53; p = 0.0064* | n.s. | n.s. | n.s. | t(13) = 1.18; p = 0.26 | n.s. | n.s. | n.s. | F(1,26) = 7.47; p = 0.011* | n.s. | n.s. | n.s. |
| rest | n.a. | t(14) = −2.55; p = 0.023* | t(14) = 1.78; p = 0.097 | t(14) = 2.84; p = 0.013* | n.a. | t(14) = 0.41; p = 0.96 | t(14) = −1.18; p = 0.26 | t(14) = 0.01; p = 0.99 | n.a. | F(1,28) = 5.74; p = 0.024* | F(1,28) = 3.66; p = 0.066 | F(1,28) = 4.44; p = 0.044* | |
Analyses were conducted on rest and task data. Moreover in order to show that specific effects relate to plasticity induction (8 ms IPI) several higher-level analyses contrasting Experiment 1 and 2 are presented. T-tests were conducted as two-tailed paired t-tests (within subjects). Mixed-model ANOVAs were conducted between experiments (across subjects). Detailed information on all analyses is provided in the ‘Materials and methods’ section. Asterisks indicate significant results, p < 0.05. Abbreviations: n.s. = non-significant.