Title: Learning Task-Agnostic Motifs to Capture the Continuous Nature of Animal Behavior
Primary area: applications to neuroscience & cognitive science
Keywords: behavioral neuroscience, animal behavior, compositional behavior modeling, behavior segmentation, neuroethology

Abstract: Animals flexibly recombine a finite set of core motor motifs to meet diverse task demands, but existing behavior segmentation methods oversimplify this process by imposing discrete syllables under restrictive generative assumptions. To better capture the continuous structure of behavior generation, we introduce motif-based continuous dynamics (MCD) discovery, a framework that (1) uncovers interpretable motif sets as latent basis functions of behavior by leveraging representations of behavioral transition structure, and (2) models behavioral dynamics as continuously evolving mixtures of these motifs. We validate MCD on a multi-task gridworld, a labyrinth navigation task, and freely moving animal behavior. Across settings, it identifies reusable motif components, captures continuous compositional dynamics, and generates realistic trajectories beyond the capabilities of traditional discrete segmentation models. By providing a generative account of how complex animal behaviors emerge from dynamic combinations of fundamental motor motifs, our approach advances the quantitative study of natural behavior.

TL;DR: We introduce motif-based continuous dynamics (MCD) model, which discovers interpretable motor motifs and their dynamic compositions, offering a principled account of the continuous nature of animal behaviors beyond traditional discrete segmentation.