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• W2773588873 abstract "Many legged animals change gaits when increasing speed. In insects, only one gait change has been documented so far, from slow walking to fast running, which is characterised by an alternating tripod. Studies on some fast-running insects suggested a further gait change at higher running speeds. Apart from speed, insect gaits and leg co-ordination have been shown to be influenced by substrate properties, but the detailed effects of speed and substrate on gait changes are still unclear. Here we investigate high-speed locomotion and gait changes of the cockroach Nauphoeta cinerea, on two substrates of different slipperiness. Analyses of leg co-ordination and body oscillations for straight and steady escape runs revealed that at high speeds, blaberid cockroaches changed from an alternating tripod to a rather metachronal gait, which to our knowledge, has not been described before for terrestrial arthropods. Despite low duty factors, this new gait is characterised by low vertical amplitudes of the centre of mass (COM), low vertical accelerations and presumably reduced total vertical peak forces. However, lateral amplitudes and accelerations were higher in the faster gait with reduced leg synchronisation than in the tripod gait with distinct leg synchronisation. Temporally distributed leg force application as resulting from metachronal leg coordination at high running speeds may be particularly useful in animals with limited capabilities for elastic energy storage within the legs, as energy efficiency can be increased without the need for elasticity in the legs. It may also facilitate locomotion on slippery surfaces, which usually reduce leg force transmission to the ground. Moreover, increased temporal overlap of the stance phases of the legs likely improves locomotion control, which might result in a higher dynamic stability." @default.
• W2773588873 created "2017-12-22" @default.
• W2773588873 creator A5000765538 @default.
• W2773588873 creator A5057722932 @default.
• W2773588873 creator A5090762977 @default.
• W2773588873 date "2017-12-01" @default.
• W2773588873 modified "2023-10-13" @default.
• W2773588873 title "Speed dependent phase shifts and gait changes in cockroaches running on substrates of different slipperiness" @default.
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• W2773588873 doi "https://doi.org/10.1186/s12983-017-0232-y" @default.
• W2773588873 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5719566" @default.
• W2773588873 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29225659" @default.
• W2773588873 hasPublicationYear "2017" @default.
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