Research Output per year
Some frog species, such as Kassina maculata (red-legged running frog), use an asynchronous walking/running gait as their primary locomotor mode. Prior comparative anatomy work has suggested that lateral rotation of the pelvis improves walking performance by increasing hindlimb stride length; however, this hypothesis has never been tested. Using non-invasive methods, experimental high-speed video data collected from eight animals were used to create two three-dimensional kinematic models. These models, each fixed to alternative local anatomical reference frames, were used to investigate the hypothesis that lateral rotation of the mobile ilio-sacral joint in the anuran pelvis plays a propulsive role in walking locomotion by increasing hindlimb stride length. All frogs used a walking gait (duty factor greater than 0.5) despite travelling over a range of speeds (0.04–0.23 m s−1). The hindlimb joint motions throughout a single stride were temporally synchronized with lateral rotation of the pelvis. The pelvis itself, on average, underwent an angular excursion of 12.71° (±4.39°) with respect to the body midline during lateral rotation. However, comparison between our two kinematic models demonstrated that lateral rotation of the pelvis only increases the cranio-caudal excursion of the hindlimb modestly. Thus, we propose that pelvic lateral rotation is not a stride length augmenting mechanism in K. maculata.
|Date made available||1 May 2019|
The impact of pelvic lateral rotation on hindlimb kinematics and stride-length in the red-legged running frog, Kassina maculataCollings, A., Porro, L., Hill, C. & Richards, C. T., 8 May 2019, In : Royal Society Open Science. 6, 5, 190060.
Research output: Contribution to journal › Article
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Collings, A. J. (Contributor), Porro, L. B. (Creator), Hill, C. (Creator), Richards, C. T. (Creator) (1 May 2019). Supplementary material from "The impact of pelvic lateral rotation on hindlimb kinematics and stride length in the red-legged running frog, Kassina maculata". figshare. 10.6084/m9.figshare.c.4491278.v1