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Table 4 Average parameters of twitch and tetanus of EDL and soleus muscles

From: Dietary selenium augments sarcoplasmic calcium release and mechanical performance in mice

  Contraction type Control Selenate NanoSe
0.5 ppm 5 ppm 0.5 ppm 5 ppm
EDL SOL EDL SOL EDL SOL EDL SOL EDL SOL
Peak (mN/mm2) Single twitch 0.72 ± 0.09 0.52 ± 0.10 0.68 ± 0.11 0.93 ± 0.13* 0.98 ± 0.08* 1.06 ± 0.15* 0.82 ± 0.13 1.04 ± 0.20* 0.96 ± 0.08* 1.26 ± 0.12*
Tetanus 2.55 ± 0.39 2.72 ± 0.41 2.81 ± 0.09 5.72 ± 0.73* 3.81 ± 0.46* 6.46 ± 0.90* 3.29 ± 0.44 5.36 ± 1.31* 3.97 ± 0.56* 7.12 ± 0.37*
Time to peak (ms) Single twitch 26.7 ± 2.0 63.5 ± 4.1 28.9 ± 1.6 68.4 ± 3.2 30.0 ± 1.3 68.2 ± 2.7 29.4 ± 1.5 65.7 ± 3.4 27.9 ± 0.73 69.4 ± 7.5
Tetanus 142.2 ± 15.6 475.2 ± 21.2 140.1 ± 25.6 530.5 ± 4.2* 144.1 ± 10.6 458.4 ± 45.2 128.1 ± 14.4 475.5 ± 49.9 147.2 ± 12.6 493.3 ± 27.8
Fatigue after 150 tetani (%) 31.8 ± 5.4 29.5 ± 2.7 38.8 ± 10.5 43.3 ± 3.9 41.1 ± 3.6 47.5 ± 5.6 42.9 ± 3.2 45.7 ± 6.2 43.9 ± 6.3 49.7 ± 8.0
Number of muscles tested Single twitch 14 10 11 12 14 15 10 10 7 7
Tetanus 14 15 5 8 14 11 8 8 5 6
  1. *denotes significant difference (P < 0.05) compared to control. The amplitude of the 150th tetani were normalized to the first tetanus