Fig. 11. Ensemble averages of electromyographic (EMG) activity of the longissimus dorsi, revealing a consistent locomotor function but no ventilatory function. Samples are from three dogs (A-C), and the average across three dogs (D), with ventilatory (bold lines) and acceleration (thin lines) traces to reveal relationships to breath and stride (E). IF indicates ipsilateral forelimb support and CF contralateral forelimb support in the footfall bars at the bottom. All traces are on the same time scale. Exp., expiration; Insp., inspiration.