2010, Vol.13, No.3, pp.277-285
The numerical analysis of kinematic
data of Drosophila melanogaster tethered flight is
presented. For a reliable detection of regimes of wing vibration a
two-step numerical procedure is proposed. The notion of a
cumulative phase drift is used to identify different scales of
wings phase modulation. By means of wavelets the time-frequency
domain of wing oscillations is studied. The wingbeat undergoes an
intermittent
oscillations of irregular character during unstimulated flight (no mechanical or visual stimulation is used). It is shown that the wing phase grows non-monotonically with short-time intervals
of alternating variations in phase. The frequency plots of
long-time ( 20 s) continuous data recordings reveal rapid
switches between different frequency regimes.
Key words:
biomechanics, neuro-motor activity, wavelet analysis
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