Lateral bending of the trunk during terrestrial, quadrupedal locomotion was analyzed in four species of lizards, using high-speed videography and computerized motion analysis. The focus of the analysis was whether lizards produce a standing or a traveling wave of bending in the trunk during locomotion. Lizards with well-developed limbs (Cnemidophorus tigris and Dipsosaurus dorsalis) exhibit a standing wave of lateral bending at low speeds, which is replaced by a traveling wave of bending as velocity increases. Lizards with diminutive limbs (Gerrhonotus kingii and Eumeces multivirgatus) exhibit a traveling wave of lateral bending, even at the lowest speeds recorded. These results are not consistent with the ideas that lizards produce a standing wave of lateral bending during locomotion or that amniote vertebrates have lost the ability to produce a traveling wave of lateral flexion due to a change in the central pattern generator that controls locomotion.
JOURNAL ARTICLE| 01 December 1992
LATERAL BENDING DURING LIZARD LOCOMOTION
Online Issn: 1477-9145
Print Issn: 0022-0949
© 1992 The Company of Biologists Limited
J Exp Biol (1992) 173 (1): 1–10.
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R. Ritter; LATERAL BENDING DURING LIZARD LOCOMOTION. J Exp Biol 1 December 1992; 173 (1): 1–10. doi: https://doi.org/10.1242/jeb.173.1.1
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