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Fig. 2. Illustration of variables extracted from the strain data. Plot of
1 magnitude recorded from lateral aspect of the mandibular
corpus of owl monkey 1 in experiment 9 (data from C.F.R. and W.L.H., recorded
at Duke University). Three chews ipsilateral to the strain gage are shown. The
strain profile between power strokes does not return to zero because of strain
in the mandible during opening. The following data were extracted from each
power stroke: time (open circles) and magnitude (black circles) of peak
strain, and time at which 5% of peak strain was reached in loading (grey
circles). The duration of loading was calculated as the time from 5% of peak
to strain to peak strain; the loading rate was calculated as peak strain
magnitude divided by duration of loading. Cycle time for each cycle was
estimated as the duration of time from the preceding peak to the following
peak, divided by 2. In the case of the middle cycle in this figure, cycle
time=(T3T1/2)