Table 5. The functional connectivity between the DMN key nodes and their alterations induced by acupuncture within the alpha band (8–13 Hz).
| Functional Connectivity | Alpha | ||||
| Rest | NAP | P-value | ST36 | P-value | |
| MFG-SFG | 0.3511 | 0.3768 | 0.564 | 0.3491 | 0.988 |
| SFG-ACC | 0.0997 | 0.1573 | 0.066 | 0.1103 | 0.078 |
| ACC-PCC | 0.0908 | 0.0778 | 0.034 | 0.1063 | 0.403 |
| PCC-STG | 0 | 0 | – | 0 | – |
| STG-AG | 0.0303 | 0 | – | 0.0800 | 0.148 |
| AG-IPL | 0.6003 | 0.6231 | 0.262 | 0.6070 | 0.768 |
| IPL-MTG | 0.1620 | 0.1753 | 0.362 | 0.1583 | 0.487 |
| MTG-MFG | 0 | 0 | – | 0 | – |
| MFG-ACC | 0.4672 | 0.3990 | 0.667 | 0.4492 | 0.116 |
| SFG-PCC | 0.0489 | 0.0460 | 0.912 | 0 | – |
| ACC-STG | 0.0925 | 0.0929 | 0.496 | 0.0908 | 0.684 |
| PCC-AG | 0.2084 | 0.1649 | 0.111 | 0.1593 | 0.157 |
| STG-IPL | 0.1000 | 0.0991 | 0.711 | 0.0984 | 0.689 |
| AG-MTG | 0.2778 | 0.3513 | 0.007 | 0.2971 | 0.731 |
| IPL-MFG | 0 | 0 | – | 0 | – |
| MTG-SFG | 0.0649 | 0.0544 | 0.482 | 0.0733 | 0.721 |
| MFG-PCC | 0 | 0.0451 | – | 0 | – |
| SFG-STG | 0.0388 | 0 | – | 0.0580 | 0.299 |
| ACC-AG | 0 | 0 | – | 0 | – |
| PCC-IPL | 0.3218 | 0.3922 | 0.197 | 0.3020 | 0.606 |
| STG-MTG | 0.2581 | 0.2926 | 0.501 | 0.2536 | 0.616 |
| AG-MFG | 0 | 0 | – | 0.0524 | – |
| IPL-SFG | 0.0604 | 0.0544 | 0.697 | 0.0622 | 0.696 |
| MTG-ACC | 0 | 0.0556 | – | 0 | – |
| MFG-STG | 0.1160 | 0.0957 | 0.155 | 0.1151 | 0.889 |
| SFG-AG | 0 | 0 | – | 0.0543 | – |
| ACC-IPL | 0.1708 | 0.1638 | 0.479 | 0.1697 | 0.749 |
| PCC-MTG | 0.0588 | 0.0508 | 0.633 | 0.0955 | 0.379 |
The maximum of the 4 pairwise connections obtained from the two ROIs located in both hemispheres was defined as the connectivity between the two nodes (one sample t-test, P<0.05). Significant alterations induced by acupuncture at ST36 relative to NAP were based on the paired t-test (P<0.05) or with the emergence/suspension of functional connectivity following acupuncture compared with the resting state.