Exploring differential limb function and limb asymmetry in quadrupedal walking frogs
Specialized running/walking frogs accommodate a quadrupedal gait by moving away from the very short forelimbs typical of a frog and have limb proportions more similar to cursorial mammalian quadrupeds. Our lab seeks to understand how differences in fore- and hindlimb length asymmetries within the body impact limb function and overall quadrupedal locomotor performance. Our lab uses 3D high-speed videography and force-plate ergometry to quantify ground reaction force vectors and joint torques relative to 3D limb postures to determine the constraints on limb asymmetry and quadrupedal locomotion.
Navigating the impact and trade-offs of variables substrates on specialized locomotor modes
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Frogs face challenges when navigating various natural structures. The mechanical properties of the structures they interact with can affect locomotor performance. Our lab investigates how specialized forms of locomotion, from tendon to muscle powered systems may result in differing locomotor outcomes when encountering variable or unpredictable environments. We used various in vivo and in vitro techniques in the lab to investigate the motor control strategies and muscle-tendon properties when interacting with complex environments.
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Unraveling tendon ultra-structure and elastic properties in specialized locomotor modes
Passive elastic structures within muscle and tendon have a profound impact on locomotor performance. Elastic muscle properties with muscle have been shown to vary within frogs of differing locomotor types. Like muscle, tendon is organized in a hierarchical structure made up of bundled collagen fibrils, making up whole tendon fascicles. Our lab is investigating the characteristic crimping or helical patterns of tendon fascicles across frogs species to understand how the tendon organization may be tuned to the mechanical demands based upon locomotor specialization.
External Collaborators: Becky Wells, University of Pennsylvania
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