Fig. 8. Ensemble averages of electromyographic (EMG) activity of the abdominal
portion of the internal oblique muscle. As in
Fig. 7, this muscle has a
locomotor function but no ventilatory function during running. Samples are
from four dogs (A-D), and the average across four dogs (E), with ventilatory
(bold lines) and acceleration (thin lines) traces to reveal relationships to
breath and stride (F). 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.
