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Axial motion statistics (median ± standard deviation) over the 14-subject population.
| PV (μm) | Mean deviation (μm) | RMS (μm) | Speed (μm/s) | |
|---|---|---|---|---|
| Normal breathing | 276 ± 154 | 57 ± 36 | 68 ± 42 | 941 ± 194 |
| Holding breath | 230 ± 98 | 42 ± 24 | 52 ± 28 | 988 ± 209 |
Statistics were drawn in both normal breathing and breath-holding conditions in time series of 3-s duration. PV, peak-to-valley amplitude.
