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Fig. 6. The effects of temperature on stretch-induced enhancement of twitch force
in indirectly stimulated muscle. Twitch forces are expressed as values
relative to the force obtained by direct stimulation at one muscle length
(l0). The thick line is the same regression curve as shown
in Fig. 5A. Forces were
measured 2 min after stretching each preparation from l0
to the length indicated on the abscissa at three different temperatures; open
circles, 4°C (N=5); filled triangles, 12°C (N=4);
open squares, 22°C (N=4). All animals had been kept for more than
2 months at room temperature before the experiment.