Table 1.
Main characteristics of sleep spindle (SS). SWO: Slow Wave Oscillations; coord: coordinates.
| Parameters of SS | Measurement | Units |
|---|---|---|
| Individual properties | ||
|
| ||
| Main frequency | Mean intraspindle frequency | Hz |
| Intraspindle frequency | Rate of frequency changes | Hz/s |
| Duration | Time between start and end | s |
| Shape | Skewness and kurtosis | — |
| Scalp localization | EEG channel | coord(x, y) |
| Source localization | Spindle origin | coord(x, y, z) |
| Interplay | Delay between the nearest SWO and SS | s |
|
| ||
| Ensemble properties | ||
|
| ||
| Count | Number of SS | — |
| Density | Count by min (within cycles and sleep stages) | min−1 |
| Rate | Time interval between successive SS | s |