Bipedal Lizards
نویسندگان
چکیده
منابع مشابه
Why go bipedal? Locomotion and morphology in Australian agamid lizards.
Bipedal locomotion by lizards has previously been considered to provide a locomotory advantage. We examined this premise for a group of quadrupedal Australian agamid lizards, which vary in the extent to which they will become bipedal. The percentage of strides that each species ran bipedally, recorded using high speed video cameras, was positively related to body size and the proximity of the b...
متن کاملPerformance and three-dimensional kinematics of bipedal lizards during obstacle negotiation.
Bipedal running is common among lizard species, but although the kinematics and performance of this gait have been well characterized, the advantages in biologically relevant situations are still unclear. Obstacle negotiation is a task that is ecologically relevant to many animals while moving at high speeds, such as during bipedal running, yet little is known about how obstacles impact locomot...
متن کاملComparative three-dimensional kinematics of the hindlimb for high-speed bipedal and quadrupedal locomotion of lizards
Although lizards have been model organisms for testing locomotor performance and in ecomorphological studies, the limb movements of lizards during high-speed locomotion are poorly understood. Thus, we quantified the three-dimensional kinematics of the hindlimb, body and tail for five morphologically distinct species of lizard during steady-speed locomotion near maximum sprinting speed (2-5 m s-...
متن کاملIn search of the pitching momentum that enables some lizards to sustain bipedal running at constant speeds.
The forelimbs of lizards are often lifted from the ground when they start sprinting. Previous research pointed out that this is a consequence of the propulsive forces from the hindlimbs. However, despite forward acceleration being hypothesized as necessary to lift the head, trunk and forelimbs, some species of agamids, teiids and basilisks sustain running in a bipedal posture at a constant spee...
متن کاملTowards Smooth Bipedal Walking
mission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Abstract In this paper we examine exchange-of-support for a simple planar bipedal robot. We derive a set of conditions which will...
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ژورنال
عنوان ژورنال: Nature
سال: 1898
ISSN: 0028-0836,1476-4687
DOI: 10.1038/057365e0