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Table 1.

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

MuscleMuscle 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** 
MuscleMuscle 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).

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