Characteristics of isometric twitch contractions of the extensor digitorum longus and the soleus muscles of Suncus etruscus (body mass 2.2±0.3 g, N=12) at 25°C
| Muscle . | Muscle mass (mg) . | tp (ms) . | tr50 (ms) . | tr75 (ms) . | tr90 (ms) . |
|---|---|---|---|---|---|
| Soleus (N=5) | 0.37±0.04 | 12.7±2.3 | 17.3±4.6 | 27.7±6.5 | 42.2±10.8 |
| EDL (N=6) | 0.45±0.08 | 11.0±1.1 | 11.6±2.6* | 16.7±2.9** | 27.0±3.8** |
| Muscle . | Muscle mass (mg) . | tp (ms) . | tr50 (ms) . | tr75 (ms) . | tr90 (ms) . |
|---|---|---|---|---|---|
| Soleus (N=5) | 0.37±0.04 | 12.7±2.3 | 17.3±4.6 | 27.7±6.5 | 42.2±10.8 |
| EDL (N=6) | 0.45±0.08 | 11.0±1.1 | 11.6±2.6* | 16.7±2.9** | 27.0±3.8** |
Values are means ± S.D. for N muscles.
tp, time to peak force; tr50, tr75, tr90, 50, 75 and 90% relaxation times.
Significance levels are calculated for the difference between extensor digitorum longus (EDL) and soleus muscle: *P<0.05, **P<0.01 (unpaired t-test).