Figure 6.

EMG patterns in different locomotor tasks. Averaged EMGs in different tests for six muscles: Bra-R, Tric-R, Tib-R, Gast-R, Vast-R, and Glut-R. Phase histograms were obtained for each of the periods (1–4) of the normalized locomotor cycle in one cat. Averaging was performed for 15–30 locomotor cycles in each test. SD is indicated by interrupted line. Ordinate, Arbitrary units (the same for all tests). The histograms for the control quadrupedal locomotion are colored black, for the bipedal tests in which a limb containing the muscle was walking are colored dark gray, and those for the bipedal tests in which the limb was standing are colored light gray. The CCs of the EMG pattern in a given bipedal test to the pattern in the control test are indicated.