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Static stability predicts the continuum of interleg coordination patterns in Drosophila

Static stability predicts the continuum of interleg coordination patterns in Drosophila

来源:bioRxiv_logobioRxiv
英文摘要

Abstract During walking, insects must coordinate the movements of their six legs for efficient locomotion. This interleg coordination is speed-dependent; fast walking in insects is associated with tripod coordination patterns, while slow walking is associated with more variable, tetrapod-like patterns. To date, however, there has been no comprehensive explanation as to why these speed-dependent shifts in interleg coordination should occur in insects. Tripod coordination would be sufficient at low walking speeds. The fact that insects use a different interleg coordination pattern at lower speeds suggests that it is more optimal or advantageous at these speeds. Furthermore, previous studies focused on discrete tripod and tetrapod coordination patterns. Experimental data, however, suggest that changes observed in interleg coordination are part of a speed-dependent spectrum. Here, we explore these issues in relation to static stability as an important aspect of interleg coordination in Drosophila. We created a model that uses basic experimentally measured parameters in fruit flies to find the interleg phase relationships that maximize stability for a given walking speed. Based on this measure, the model predicted a continuum of interleg coordination patterns spanning the complete range of walking speeds. Furthermore, for low walking speeds the model predicted tetrapod-like patterns to be most stable, while at high walking speeds tripod coordination emerged as most optimal. Finally, we validated the basic assumption of a continuum of interleg coordination patterns in a large set of experimental data from walking fruit flies and compared these data with the model-based predictions. Summary statementA simple stability-based modelling approach can explain why walking insects use different leg coordination patterns in a speed-dependent way.

Bockem¨1hl Till、Szczecinski Nicholas S.、Chockley Alexander S.、B¨1schges Ansgar

Department of Animal Physiology, Zoological Institute, University of CologneDepartment of Animal Physiology, Zoological Institute, University of CologneDepartment of Animal Physiology, Zoological Institute, University of CologneDepartment of Animal Physiology, Zoological Institute, University of Cologne

10.1101/374272

昆虫学生物科学理论、生物科学方法生物科学研究方法、生物科学研究技术

motor controllocomotioninsect walkingstabilityinterleg coordination

Bockem¨1hl Till,Szczecinski Nicholas S.,Chockley Alexander S.,B¨1schges Ansgar.Static stability predicts the continuum of interleg coordination patterns in Drosophila[EB/OL].(2025-03-28)[2025-04-26].https://www.biorxiv.org/content/10.1101/374272.点此复制

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