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Figure 1


Fig. 1. In vivo zebra finch pectoralis fascicle strain and EMG activity. Traces show representative data obtained at a flight speed of 10 m s–1. Fascicle segment length was measured in situ by sonomicrometry. Muscle activity was measured using a bipolar EMG electrode (see text). Fascicle length is shown relative to resting length L0 measured with the bird resting on a perch.





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