Table 2.
Mechanical and structural parameters collected in experiments with FReLoN detector
| A FReLoN | Rest | T0 | V0,start |
|---|---|---|---|
| SM3 (nm) | 14.340 ± 0.004 | 14.561 ± 0.001 | 14.333 ± 0.007 |
| SM6 (nm) | 7.157 ± 0.003 | 7.284 ± 0.004 | 7.170 ± 0.010 |
| B FReLoN | t1/2,force (ms) | t1/2,SM3 (ms) | t1/2,SM6 (ms) |
|---|---|---|---|
| Isometric | 47.0 ± 1.8 | 37.3 ± 1.1 | 21.7 ± 1.1 |
| V0,start | 55.2 ± 2.4 | 46.4 ± 1.1 | 32.6 ± 1.3 |
A, spacing of M3 and M6 reflections at rest, at the isometric tetanus plateau (T0) and during steady shortening at V0 imposed 5 ms after the start of stimulation (V0,start). Means ±s.d. from n = 3 fibres. The V0,start value is the mean of the last two frames before the end of shortening. V0 in these fibres was 2.16 ± 0.06 μm s−1 (half-sarcomere)−1. B, half-times of changes of force (t1/2,force), spacing of M3 (t1/2,SM3) and spacing of M6 (t1/2,SM6) in the isometric tetanus (first row) and in the tetanus with shortening at V0 imposed 5 ms after the start of stimulation (second row). The half-time of force is the mean ±s.d. of n = 3 fibres. The error for spacing is provided by the sigmoid fitting program.