Characteristics of Tetanic Force Produced by the Sternomastoid Muscle of the Rat

Figure 4

Muscle force as a function of stimulation current. This group average shows the density of force produced by the SM muscle and normalized by its cross-section area at different stimulation currents. Vertical bars represent the standard error of the mean. The passive tension was at a moderate level (0.08 N). The nerve was stimulated at 200 Hz.