Table 1.
Period and phase of Tb andTa rhythms during deep torpor in LL
| Group1-a | n | Period (h)1-b | Nadir Interval (hr)1-c | Bout duration (d) | ||
|---|---|---|---|---|---|---|
| Tb | Ta | Tb-Ta | ||||
| Synchronous | ||||||
| CON | 21 | 23.92 ± 0.11 | 23.88 ± 0.15 | 0.04 ± 0.10 | 0.8 ± 0.3 | 4.9 ± 1.7 |
| SCNx-NCH | 10 | 23.36 ± 0.28 | 23.11 ± 0.22 | 0.25 ± 0.19* | 4.0 ± 0.6* | 3.9 ± 0.7 |
| Asynchronous | ||||||
| CON | 6 | 24.43 ± 1.09 | 22.84 ± 1.07 | 1.60 ± 0.94* | 10.3 ± 1.1* | 4.5 ± 0.3 |
| SCNx-NCH | 6 | NS | 23.81 ± 0.36 | — | — | 3.5 ± 0.2 |
F1-a
Torpor bouts were categorized as in phase if cyclic increases in Tb occurred shortly after cyclic increases in Ta and as out of phase if Tb increases occurred asTa decreased or remained stable.
F1-b
Rhythm periods were determined by periodogram analysis. Absolute differences betweenTb and Ta were calculated for each torpor bout.
F1-c
Nadir interval represents the time lag between the daily nadirs of Ta andTb rhythms.
*
p < 0.001 compared with CON for synchronous torpor bouts. NS, No significant circadian periodicity.