Animal Movement Pattern Model Identification based on Detrended Fluctuation Analysis

Video-based marker-free tracking and multi-scale analysis of mouse locomotor activity and behavioral aspects in an open field arena: A perspective approach to the quantification of complex gait disturbances associated with Alzheimer's disease

“…We have also noted that the crossover location that represents the only free parameter in the animal movement model explicitly reflected behavioral alterations in the presence of various stimulative and sedative pharmacological stimuli. Our current results are closely reminiscent to those previously observed, with similar correlation exponents H ≈2 observed at small scales, although smaller correlation exponents close or slightly above H ≈1/2 observed at large scales, in contrast to H ≈1 estimated in previous studies (Lyanova et al, 2022 ; Bogachev et al, 2023 ). While there is no obvious reason for the latter discrepancy, there could be potentially multiple contributing effects, ranging from finite size effects associated with the test recording duration to differences in video analysis and data pre-processing (e.g., smoothing for background noise reduction) algorithms.…”

“…The conventional fluctuation functions shown in Figure 3 characterize the dynamics of individual body parts, similar to those recently used to characterized the whole-animal movements of rats R. norvegicus in an open field test (Lyanova et al, 2022) and of fishes D. rerio in a novel tank test (Bogachev et al, 2023), respectively. In this work, we additionally considered joint fluctuation functions that characterize mutual interactions of different body parts obtained by detrended cross-correlation analysis (DCCA), indicated in Figure 3.…”

“…There are several other indicators supporting contribution of behavioral aspects to the emergence and location of the crossover, in particular, (a) observation of a similar crossover not only in body part movements, but also in the animal midpoint dynamics; (b) observation of a similar crossover in a recent work characterizing walking patterns in rats R.norvegicus where the open field have been observed from above, and thus no tracking of individual body parts have been performed (Lyanova et al, 2022), as well as (c) observation of a similar crossover in a recent work characterizing movement patterns in fishes D.rerio in a novel tank test unrelated to walking (although swimming patterns also contain oscillatory patterns) (Bogachev et al, 2023).…”

“…In a recent study of the whole-animal movements we have characterized the behavioral patterns of R. norvegicus in a rodent open field test (Lyanova et al, 2022 ) and for D. rerio in a novel tank test (Bogachev et al, 2023 ). In the above studies, we have already observed two asymptotic scaling regimes separated by a characteristic crossover s × that also appeared a single characteristic scale parameter.…”