| TDS | Time Delay Stability |
| DisEn | Dispersion Entropy |
| PEn | Permutation Entropy |
| ApEn | Approximate Entropy |
| SampEn | Sample Entropy |
| FuzzyEn | Fuzzy Entropy |
| EEG | Electroencephalogram |
| RESP | Nasal Respiratory |
| BP | Arterial Blood Pressure |
| ECG | Electrocardiogram |
| MPD | Mean Percentage Difference |