| MDD | Major depressive disorder |
| HC | Healthy control |
| Hb | Hemoglobin |
| fNIRS | Functional near-infrared spectroscopy |
| VFT | Verbal fluency task |
| BDI-II | Beck’s depression inventory-II |
| SAI | State anxiety inventory |
| HAM-D | Hamilton’s depression rating scale |
| EEG | Electroencephalogram |