Table 1. Lower back quantitative sensory testing profile after sleep restriction without or with napping.
| Area: | “Sleep restriction” session | “Sleep restriction + nap” session | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lower back | ||||||||||||
| Sleep condition | Control | Sleep | Recovery | Control | Sleep restriction | Recovery | ||||||
| restriction | + nap | |||||||||||
| Test time | 10:00 | 16:00 | 10:00 | 16:00 | 10:00 | 16:00 | 10:00 | 16:00 | 10:00 | 16:00 | 10:00 | 16:00 |
| Warm detection threshold (°C) | 34.8 | 34.8 | 34.8 | 35 | 35 | 34.6 | 34.3 | 34.6 | 34.4 | 34.7 | 34.5 | 35.9 |
| ±1.4 | ±1.3 | ±1.5 | ±1.4 | ±1.1 | ±1.4 | ±0.9 | ±1.2 | ±0.9 | ±1.1 | ±1.1 | ±2.2 | |
| Heat pain threshold | 44.1 | 44.1 | 42.6* | 42.7* | 43.9 | 44.6 | 43 | 43 | 42.8 | 42.5 | 43,8 | 43,4 |
| (°C) | ±0.9 | ±1.9 | ±0.9 | ±1.2 | ±1.8 | ±1.6 | ±0.9 | ±1.4 | ±0.6 | ±1 | ±1.8 | ±1.7 |
| Cold detection threshold | 29.4 | 29.1 | 29.1 | 29.2 | 28.9 | 29.2 | 29.7 | 29.2 | 29.5 | 29.5 | 29.5 | 29.6 |
| (°C) | ±0.7 | ±0.7 | ±0.6 | ±1.1 | ±0.9 | ±0.8 | ±1.3 | ±1.0 | ±1.4 | ±1.2 | ±1.3 | ±1.2 |
| Cold pain threshold | 5.5 | 5.9 | 5.3 | 5.6 | 5.4 | 5.1 | 6.8 | 5.2 | 5.6 | 6.3 | 5.1 | 5.8 |
| (°C) | ±1.1 | ±1.6 | ±0.5 | ±1.0 | ±0.7 | ±0.2 | ±3.3 | ±0.4 | ±1.1 | ±2.4 | ±0.2 | ±1.4 |
| Pressure pain | 1369 | 1373 | 1349 | 1337 | 1210 | 1239 | 1284 | 1290 | 1173 | 1186 | 1228 | 1307 |
| threshold (kPa) | ±434 | ±397 | ±372 | ±378 | ±336 | ±452 | ±421 | ±434 | ±413 | ±351 | ±366 | ±375 |
Quantitative sensory testing was performed twice daily, at 10:00 and 16:00, on the lower back area. Warmth and cold detection thresholds, and the thresholds for heat, cold and pressure pain were assessed in control, post-sleep restriction and recovery conditions in the “sleep restriction” and “sleep restriction + nap” sessions for each subjects.
Mean ± SEM;
* significant vs. corresponding control values obtained at the same time of day.